Статті в журналах: "CBR VALUE"

1

Dobrzycki, Patryk. "The Impact of Polypropylene Fibre Addition on the CBR Value." Architecture, Civil Engineering, Environment 16, no. 2 (June 1, 2023): 81–88. http://dx.doi.org/10.2478/acee-2023-0017.

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Abstract The classic test for soil or aggregate bearing capacity in road construction is the CBR test. The results of the CBR were determined for gravelly sand and sand with the addition of 1.5% cement, as well as for their mixtures with 18 mm long polypropylene fibres in the amounts of 0.1%, 0.2% and 0.3%. The effect of compaction and time of curing of samples stabilised with hydraulic binder were also determined. The natural soil without cement and fibre additions had relatively high CBR values. The additions of 0.1% and 0.2% polypropylene fibres to the dry mass of the soil resulted in an approximately 2-fold increase in the CBR value for the samples compacted using the standard method. Increasing the amount of fibres to 0.3% caused a reduction in the CBR value to that obtained without fibre addition. For samples compacted using the modified Proctor method, the observations are different. Only the sample with 0.2% fibre addition achieved a slightly higher CBR value. Moreover, the addition of 1.5% cement and the length of treatment increased the CBR values.

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Suthar, Manju, and Praveen Aggarwal. "Modeling CBR Value using RF and M5P Techniques." MENDEL 25, no. 1 (June 24, 2019): 73–78. http://dx.doi.org/10.13164/mendel.2019.1.073.

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Two modeling techniques namely (i) Random forest (RF) and (ii) M5P model tree are used to model, soaked California bearing ratio (CBR) value of thermal power plant generated stabilized pond ash. Pond ash was stabilized with the help of commercially available lime and industrial waste lime sludge. CBR data generated from exhaustive experimental programme was used in the study. Variations in doses of stabilizer i.e. lime (L) and lime sludge (LS), curing duration (CP) and proctor test results density (MDD) & moisture (OMC) are considered as input variables. Experimentally observed CBR value was used as output variable. Performance of models was measured using standard statistical parameters. Although, both the model’s performance in predicting CBR value is satisfactory however from the statistical parameters it is evident that RF method perform better in comparison to M5P model. Sensitivity analyses identify CP as the most influencing factor that affects CBR value of the stabilized pond ash.

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Heldita, Dina. "ANALISIS KEPADATAN TANAH PADA RUAS JALAN MASUK KEMAKAM GURU CANTUNG KECAMATAN KELUMPANG HULU KABUPATEN KOTABARU." AL ULUM JURNAL SAINS DAN TEKNOLOGI 5, no. 1 (November 1, 2019): 37. http://dx.doi.org/10.31602/ajst.v5i1.2715.

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Support for highway planning that must be determined according to the optimal traffic requirements for traffic that is in accordance with its function. Analysis of soil density on the Banian-Sungai Durian road uses a Dynamic Cone Penetrometer (DCP) tool with the aim of finding the CBR value of the soil. The value supported is to get the DCP value, the California Bearing Ratio (CBR) value, and the Land Carrying Capacity (DDT) value. Tests carried out along the 1,550 m with a width of 4m. For the point of data collection zigzag per 100 m. The test results show the average value of DCP is 29.32 mm, while the average value of CBR is 5.07%. Design CBR value is 2.24%, with DDT is 4.47%. The CBR value of the design obtained does not meet the standard CBR value requirements that have been set at 6%. It needs to be re-compacted on the ground because it does not meet the CBR value standards that have been determined and approved to add road pavement.Keywords: Land density, DCP, Field CBR, Banian Village

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Amrullah, Arif, and Mega Yunanda. "ANALISA DAYA DUKUNG TANAH (CBR) MENGGUNAKAN BAHAN PENAMBAH KAPUR + SEMEN DALAM PROSENTASE TERTENTU." JURNAL ILMIAH BERING'S 7, no. 02 (October 5, 2020): 62–76. http://dx.doi.org/10.36050/berings.v7i02.288.

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The phenomenon of development (swelling) of clay soil which causes various impacts on the construction of civil buildings, especially road construction, especially in the area of South Sumatra where most of the area is swampy. One of the mixtures to improve soil quality can use lime and cement with certain levels. The research method is experimental in the laboratory. The results of the physical properties test, namely the Sieve Analysis to pass No.200, obtained a value of 82.70%, Density obtained a value of 2.523, Liquid Limit obtained a value of 76.84%, Plastic Limit obtained a value of 44.78%, Plasticity Index obtained a value of 32.06%. The results of mechanical properties testing, namely Standard Density, obtained a Yd value of 1.216 gr / cm3 at the optimum water content of 37.20%, laboratory CBR obtained a CBR value of 3.73%. The CBR test results of the original Soil Laboratory showed that the CBR value was 3.73%. The results of laboratory CBR testing with the addition of 2% lime + 2% cement obtained CBR values of 16.46%. The results of laboratory CBR testing with the addition of 4% lime + 4% cement obtained CBR values of 28.60%. The results of laboratory CBR testing with the addition of 6% lime + 6% cement, obtained a CBR value of 34.48%.

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5

Wu, Xi Rong, and Jun Ming Shen. "Research on the Impact of Moisture Content on the CBR Value of Shanxi Loess." Advanced Materials Research 838-841 (November 2013): 80–83. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.80.

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Several typical soil samples in Shanxi Province were selected. Laboratory experiments were adopted to study the CBR of the three kinds of soil samples with different compaction and different water content. Orthogonal experiment was used to analyze the impact of factors including water content, compaction and soil sample category on the CBR value. The result shows that the moisture content has great impact on CBR value and the CBR value is maximize under optimum moisture content and maximum degree of compaction condition, while the not flooded CBR is decrease with the increasing of water content.

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Santoso, Gatot, and Achmad Munajir. "Nilai CBR Agregat Laterit Exs.Makroman Dengan Penambahan Tanah Pilihan Sebagai Material Lapis Pondasi Bawah (LPB)." Kurva S : Jurnal Keilmuan dan Aplikasi Teknik Sipil 8, no. 3 (December 6, 2020): 163. http://dx.doi.org/10.31293/teknikd.v8i3.6242.

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From the results of the CBR test, only one variation of the mixture qualifies as a bottom foundation layer material, namely with a 20% soil mixture who’s minimum CBR value is 60%. Furthermore, the test was carried out combined with the hammer aggregate with composition (laterite aggregate 35%, hammer aggregate 50%, soil 15%) obtained a CBR value of 78% with a value of Gs = 2,748 gr / cc, γd max = 1.667 gr / cm3, at Wopt = 17.02%. In the composition (laterite aggregate 25%, hammer aggregate 50%, soil 25%) obtained a CBR value of 96% with a value of Gs = 2.748 gr / cc, γd max = 1.702 gr / cm3, in Wopt = 18.02%. While in the composition (laterite aggregate 20%, hammer aggregate 60%, soil 20%) obtained a CBR value of 88% with a value of Gs = 2.748 gr / cc, γd max = 1,740 gr / cm3, in Wopt = 16.02%. So that the CBR value meets the lower foundation layer material standard, where the minimum CBR standard is 60%.Dari hasil pengujian CBR hanya satu variasi campuran yang memenuhi syarat sebagai material lapis pondasi bawah yaitu dengan campuran tanah 20% yang nilai CBR minimumnya 60%. Selanjutnya dilakukan pengujian dikombinasikan dengan agregat palu dengan komposisi (agregat laterit 35%, agregat palu 50%, tanah 15%) diperoleh nilai CBR sebesar 78% dengan nilai Gs = 2,748 gr/cc, γd max = 1,667 gr/cm3, pada Wopt = 17,02%. Pada komposisi (agregat laterit 25%, agregat palu 50%, tanah 25%) diperoleh nilai CBR sebesar 96% dengan nilai Gs = 2,748 gr/cc, γd max = 1,702 gr/cm3, pada Wopt = 18,02%. Sedangkan pada komposisi (agregat laterit 20%, agregat palu 60%, tanah 20%) diperoleh nilai CBR sebesar 88% dengan nilai Gs = 2,748 gr/cc, γd max = 1,740 gr/cm3, pada Wopt = 16,02%. Sehingga nilai CBR memenuhi standar material lapis pondasi bawah, dimana standar CBR minimumnya sebesar 60%.

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Wu, Xi Rong, and Li Li Zhu. "Analysis of the Influence of Water Content on Shanxi Loess CBR and Rebound Module." Advanced Materials Research 919-921 (April 2014): 820–23. http://dx.doi.org/10.4028/www.scientific.net/amr.919-921.820.

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Selection of five typical loess in Shanxi Province, the paper adopt the indoor test methods to prepares the different compaction and different moisture content specimens which were used to test CBR value and rebound module, analyzes the impact of compactness and moisture content on the CBR value and resilient modulus and establishes the relationship of CBR and moisture content. The result shows that the level of moisture content has great impact on CBR value and rebound module. The CBR value is maximal under optimum moisture content and maximum degree of compaction condition. The times of compaction have little effect on the improvement of CBR with increasing water content. The relationship of the soaking CBR,resilient modulus and the moisture content shows a certain regularity.Key words: Loess filler;the CBR;resilient modulus;compactness;moisture content;relationship

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8

Fajri, Aswantu, and Sazuatmo Sazuatmo. "Pemanfaatan Limbah Tutup Botol Air Mineral Sebagai Filler Pada Lapis Perkerasan Base a." MAJALAH TEKNIK SIMES 15, no. 2 (July 31, 2021): 15. http://dx.doi.org/10.32663/simes.v15i2.2064.

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One of the most common plastic wastes found around us is the cap of mineral water bottles. The waste of mineral water bottle caps as a filler on the basis is expected to reduce the impact of plastic waste it self and reduce rock waste in the quarry. Tests carried out by adding fillers of mineral water bottle cap waste as much as 0%, 10%, 20%, and 30%. The ability of mineral water bottle cap waste as a filler can be tested by looking at the value of the California Bearing Ratio (CBR) generated after addition. CBR testing is carried out by the laboratory CBR test method using a CBR penetration tool. From the examiners, the results show that; base A aggregate without the addition of mineral water bottle cap waste with a CBR value of 93.38%; the addition of 10% of mineral water bottle cap waste resulted in a CBR value of 98.73%. The addition of 20% obtained a CBR value of 96.55%; and an addition of 30% resulted in a CBR value of 87.65%. The addition of 10% and 20% of mineral water bottle cap waste filler can increase the CBR base A value, because it produces a larger CBR value without addition. Meanwhile, an increase of 30% will actually reduce the strength of the base itself because the resulting CBR value is smaller. The addition of filler of mineral water bottle cap waste can increase the CBR value of base A with the right composition. Utilization of mineral water bottle cap waste at base A will reduce the amount of plastic waste and reduce environmental pollution, as well as reduce the overexploitation of rocks for base A raw material.

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9

Arbianto, Reki, Teguh Yuono, and G. Gunarso. "Comparison of California Bearing Ratio (CBR) Value Based on Cone Penetration Test (CPT) and Dynamic Cone Penetrometer (DCP)." Journal of Advanced Civil and Environmental Engineering 4, no. 2 (November 12, 2021): 70. http://dx.doi.org/10.30659/jacee.4.2.70-78.

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In civil engineering, land is important because as a place for building infrastructure to be built, so that the building infrastructure on it is stable, adequate carrying capacity is needed. The amount of soil bearing capacity can be determined in several ways, including the California Bearing Ratio (CBR) Field Test, Cone Penetration Test (CPT) and Dynamic Cone Penetrometer (DCP). The CBR and DCP tests are often used to determine the level of surface soil density on road structures, while CPT is usually used to determine the hard soil layer on the building structure. However, in certain situations Sondir and DCP data are often used to predict the CBR value, because the test is quite practical and efficient compared to the CBR test. CBR testing requires heavy equipment which in most small-scale projects is not available. In this study, we compared the CBR value based on the data obtained from the Sondir and DCP tests. Data collection was carried out in Surakarta and its surroundings. Based on the test results, the CBR value generated from the DCP test tends to be smaller than that from the CPT test with a ratio of 0.62: 1. This study resulted in the relationship between CBR values from the results of the CPT and DCP tests shown in the following equation: CBR (DCP) % = 0.2552 CBR(CPT) + 2.6306 and CBR (DCP) % = 0.617 CBR(CPT).

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10

Handayani, Noviyanthy, and Norseta Ajie Saputra. "Persamaan Nilai Korelasi Indeks Plastisitas (PI) Tanah Dengan California Bearing Ratio (CBR) Tanah Lempung Palangka Raya." Media Ilmiah Teknik Sipil 8, no. 1 (December 1, 2019): 63–71. http://dx.doi.org/10.33084/mits.v8i1.1150.

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During this time to get the value of California Bearing Ratio (CBR) planners will conduct field tests and/or laboratory tests. This takes time and is relatively large. For this reason, it is needed a practical matter or formulation about the relationship between soil parameters so that planners do not need to test the overall soil parameters. This study aims to obtain a graph or correlation of the Plasticity Index (PI) with California Bearing Ratio (CBR) for clay soils in the Palangka Raya region. Clay soil samples were taken at 3 (three) locations in the City of Palangka Raya. Based on the results of tests on several samples obtained the largest CBR value in soil samples from Tangkiling village which reached a value of 6.56%. While the lowest CBR value obtained from the village of Kereng Bengkirai is 3.14%. For the PI value, the biggest value obtained in Bukit Rawi village is the largest, namely 20.54% and the smallest PI value obtained in Tangkiling village is 9.01%. In general, it can be concluded that the CBR value of clay is inversely proportional to the value of PI. Wherein it is known that the greater the CBR value, the smaller the PI value and vice versa. The overall correlation results of the PI value (plasticity index) to the CBR (California Bearing Ratio) obtain the correlation results using the linear graph CBR = -0.28383 PI + 8,9843. While the correlation value based on analytical calculations obtained CBR = -0,3006X + 9,0190. This test shows that the correlation value has a very high relationship when viewed from the benchmark correlation results (R = 0.80-1.00). The results of the correlation value using linear regression graphs worth R = 0.8489 and using analytical correlation methods worth R = 0.9283. So the final result of this study is to look for a relationship between PI values ??and CBR values. Then for the value of R is taken the smallest value that is R = 0.8489.

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11

Waruwu, Aazokhi, Arif Darmawandi, Tematius Halawa, and Muammar Muammar. "PERBANDINGAN ABU VULKANIK DAN KAPUR SEBAGAI MATERIAL STABILISASI TANAH LEMPUNG." Jurnal Proyek Teknik Sipil 5, no. 1 (June 19, 2022): 8–15. http://dx.doi.org/10.14710/potensi.2022.12042.

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Clay soil as a subgrade is problematic if it has a low California Bearing Ratio (CBR) value. There are many choices of stabilizing materials that can improve the CBR value, but it is necessary to consider the availability of materials around the project. This study examines partial soil improvement in CBR specimens by differentiating thickness and soil stabilizing materials. The clay stabilization materials used were volcanic ash and lime as much as 6% and 12% of the dry weight of the soil. Laboratory CBR tests were carried out on original soil specimens, 1/3 and 2/3 parts of stabilized soil, and entirely of stabilized soil. The results showed that the CBR value of the stabilized soil with lime was higher than the volcanic ash. The thickness of the stabilized soil has an effect on the CBR value, the overall CBR value is obtained stable in the stabilized soil 2/3 part of the thickness of the soil and the rest is the original compacted soil.

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Patel, Mehul l., and N. G. Raval N.G.Raval. "Study on Relation Between CBR Value of Subgrade Soil and Miosture Content." Indian Journal of Applied Research 1, no. 10 (October 1, 2011): 86–87. http://dx.doi.org/10.15373/2249555x/jul2012/28.

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Carlina, M., Y. Apriyanti, and F. Fahriani. "The Effect of Addition of Bagasse Ash and Eggshell Powder on CBR Value of Clay Soil." IOP Conference Series: Earth and Environmental Science 926, no. 1 (November 1, 2021): 012102. http://dx.doi.org/10.1088/1755-1315/926/1/012102.

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Abstract In the construction of road construction, soil bearing capacity, such as the CBR value, needs to be considered. In clay soil, the CBR value of the soil is low, so that stabilization material can be added to its repair. In this study, the stabilization materials used were waste materials in the form of bagasse ash and eggshell powder. Variations in the mixture of bagasse ash mixture used in this study were 7%, 10%, and 13% plus 3% eggshell powder. Testing in this study includes testing moisture content, sieve analysis, specific gravity, consistency limits, compaction testing, and CBR. The soil classification system used is the Unified classification (USCS), a test guideline based on SNI. From the CBR soaked test, it was found that the CBR value of clay soil increased along with the increase in the percentage of bagasse ash plus 3% eggshell powder and the increase in collisions on the soil. The percentage increase in the CBR value of clay soil with a mixture of stabilization to clay soil is 92.303%. at 65 blow. So that bagasse ash and eggshell powder greatly affect the increase in the CBR value of clay soil.

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Nugroho, Soewignjo Agus, Ferry Fatnanta, and Muhammad Khadafi Lembasi. "Perubahan Nilai CBR Terhadap Penambahan Fly Ash dan Bottom Ash pada Tanah Lempung." Rekayasa Sipil 16, no. 1 (May 12, 2022): 15–24. http://dx.doi.org/10.21776/ub.rekayasasipil.2022.016.01.3.

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Clay soil has a characteristic that is wet, it will be soft and plastic and cohesive. To overcome this problem, clay soil with high plasticity needs stabilization. The stabilization method using additives such as chalk, fly ash and bottom ash can be used as a stabilization material to increase the carrying capacity of high plasticity clay. This study is commended to know the behavior of high plasticity clay which is stabilized with lime, fly ash and bottom ash. Increased crease of the stabilized clay soil is seen from the CBR test. CBR testing is done under curing conditions for 0, 14, and 28 days and soaking for 0 and 4 days. The results showed that the CBR value increased with duration of curing and decreased throughout the duration of immersion. Then the CBR value increases with the addition of lime percentage and each mixture in a mixture variation. The highest CBR value occurred in soil L 5% + MS5 95% with a CBR value of 75.37% under conditions for 28 days of curing and 4 days of immersion. The lowest CBR value occurs in soil L 5% + MS2 95% with a CBR value of 12.85% in conditions without curing and without immersion.

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Zabielska-Adamska, Katarzyna, Patryk Dobrzycki, and Mariola Wasil. "Estimation of Stiffness of Non-Cohesive Soil in Natural State and Improved by Fiber and/or Cement Addition under Different Load Conditions." Materials 16, no. 1 (January 1, 2023): 417. http://dx.doi.org/10.3390/ma16010417.

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The aim of this study was to compare the stiffness of gravelly sand under various load conditions—static conditions using the CBR test and cyclic conditions using the resilient modulus test. The tests were conducted on natural soil and soil improved by the addition of polypropylene fibers and/or 1.5% cement. The impacts of the compaction and curing time of the stabilized samples were also determined. The soil was sheared during the Mr tests, even after fiber reinforcement, so the resilient modulus value for the unbound sand could not be obtained. The cement addition improved Mr, and the curing time also had an impact on this parameter. The fiber addition increased the value of the resilient modulus. The CBR value of the compacted gravelly sand was relatively high. It increased after adding 0.1% fibers in the case of the standard compacted samples. The greater fiber addition lowered the CBR value. For the modified compacted samples, each addition of fibers reduced the CBR value reduced the CBR value. The addition of cement influenced the CBR increase, which was also affected by the compaction method and the curing time. The addition of fibers to the stabilized sample improved the CBR value. The relationship Mr=f(CBR) obtained for all data sets was statistically significant but characterized by a large error of estimate.

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16

Dahre, Jayant Kumar. "Increasing Strength of Sub-grade Layer of Pavement using Geo-grid." International Journal for Research in Applied Science and Engineering Technology 10, no. 1 (January 31, 2022): 305–7. http://dx.doi.org/10.22214/ijraset.2022.39808.

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Abstract: This Paper describes the beneficial impact of reinforcing the sub-grade layer with a single layerof geo-grid at different positions and thereby determination of optimum position of reinforcement layer. The( best) optimum position was determined based on California Bearing Ratio (CBR value) and unconfined compression tests were conducted to decide the optimum position of geo-grid. The CBR value of a soil increases by 50-100% when it is reinforced with a single layer of geogrid. The amount of development (Improvement) depends upon the type of soil and position of geo-grid. CBR of sub-grade soil is 6.53% without reinforcement and when geo-grid was placed at 0.2H from the top, the CBR value increased to 19.66%. Soaked Condition CBR of sub-grade soil is 4.77% without reinforcement and when geo-grid was placed at 0.2H from the top, the CBR value increased to 4.46%. Keywords: Pavement, Geo-grid, Reinforced, Sub-grade, CBR, Filtration, Reinforcing

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17

Walsh, Gianfranco, Mario Schaarschmidt, and Stefan Ivens. "Assessing the effects of multichannel service provider corporate reputation on customer new product adoption and RFM value." Journal of Service Management 29, no. 4 (July 2, 2018): 680–702. http://dx.doi.org/10.1108/josm-08-2017-0211.

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Purpose Service providers leverage their corporate reputation management efforts to increase revenues by shaping customer attitudes and behaviours, yet the effects on customer innovation adoption and customer value remain unclear. In an extended conceptualisation of customer-based corporate reputation (CBR), the purpose of this paper is to propose that customer perceived risk, perceived value, and service separation are contingencies of the relationship between CBR and two key customer outcomes: customer new product adoption proneness (CPA) and recency-frequency-monetary (RFM) value. Design/methodology/approach Using a predictive survey approach, 1,001 service customers assess the online or offline operations of six multichannel retailers. The hypothesised model is tested using structural equation modelling and multigroup analysis. Findings The analysis reveals significant linkages of CBR with perceived risk and perceived value, as well as between perceived risk and perceived value and from perceived value to CPA and RFM value. These linkages vary in strength across unseparated (offline) and separated (online) services. Research limitations/implications This study uses cross-sectional data to contribute to literature that relates CBR to relevant customer outcomes by considering CPA and RFM value and investigating contingent factors. It provides conceptual and empirical evidence that price appropriateness represents a new CBR dimension. Practical implications The results reveal that CBR reduces customers’ perceived risk and positively affects their perceived value, which drives CPA and RFM value. Multichannel retailers can create rewarding customer relationships by building and nurturing good reputations. Originality/value This study is the first to link CBR with customer product adoption proneness and value, two important customer measures. It proposes and tests an extended conceptualisation of CBR.

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Fitramsya, Sendi, and Elly Tri Pujiastutie. "Pengaruh Penambahan Abu Tandan Kelapa Sawit Terhadap Daya Dukung Tanah Lempung." MAJALAH TEKNIK SIMES 16, no. 1 (January 25, 2022): 37. http://dx.doi.org/10.32663/simes.v16i1.2536.

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ABSTRACT One of the most important material that has great impat to a structure or onstrution in civil engineering job is soil, either that job is building or road pavement construction. One of problem which may happen faced by consultant or contractor ( especially for road pavement construction ) is take care of soil and other bad component to make sure those components can be used as ingredient for that pavement construction. Thing can be done to fix the mechanic property in this research is by using chemical way like adding oil palm ‘s stem ashes with 0%, 6,5%, 7%, 8%, and 8,5 % variation from clay. Biggest CBR value happen when 0,2 penetration with CBR value was 18,078% by using 8,5 % oil palm’s stem addictive. This value has increased by 2,288 % from the CBR value from the original soil which is 15,790%. With adding 6,5% oil palm’s stem ashes the CBR value increased 0,703%, when adding 7% increased by 0,273% and also when adding 8% increased 1,168%. This CBR value qualified Bina Marga 2018 general specification ( Third revision ) where CBR value > 6%.

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Koirala, Dipak, Keshab Datt Awasthi, and Niraj Bohara. "Association between CBR and Soil Index Properties: Empirical Analysis from Chitwan and Makwanpur District Soil Samples." Journal of UTEC Engineering Management 1, no. 01 (June 20, 2023): 7–15. http://dx.doi.org/10.36344/utecem.2023.v01i01.002.

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The California Bearing Ratio (CBR) value is a crucial soil parameter in road construction and design. Obtaining representative CBR values is challenging, requiring time-consuming and expensive testing procedures. To address this issue, regression equations were developed to establish correlations between CBR and soil index properties. Laboratory tests were conducted to determine the soaked CBR, Liquid Limit (LL), Plastic Limit (PL), Plasticity Index (PI), Maximum Dry Density (MDD), and Optimum Moisture Content (OMC) of soil samples. Regression models were then created between CBR and different sets of soil index properties using Microsoft Excel 2007. Strong correlations were observed between soaked CBR, PL, PI, OMC, and MDD (R2 = 0.744); CBR, LL, PL, OMC, and MDD (R2 = 0.702); CBR, PI, OMC, and MDD (R2 = 0.643); CBR, LL, OMC, and MDD (R2 = 0.621); and CBR, OMC, and MDD (R2 = 0.602). Among all equations, the relation CBR = 0.72 PL – 1.22 PI + 2.34 OMC + 106.97 MDD – 222.46 exhibited the strongest correlation with a P-value of 0.005 and R2 of 0.744.

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20

Ningrum, Puspa, Muhammad Toyeb, and Husnah Husnah. "Perubahan Nilai CBR Pada Tanah Lempung Yang Dicampur Abu Tandan Sawit." Journal of Infrastructure and Civil Engineering 2, no. 2 (July 31, 2022): 127–33. http://dx.doi.org/10.35583/jice.v2i2.25.

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CBR (California Bearing Ratio) value is usually used to determine the bearing capacity of a soil type. Soil conditions with low bearing capacity are often found in clay soil types. There are several ways to increase the CBR value of clay, one of which is by adding palm bunch ash. In this research, an analysis of changes in the CBR value of clay with addition of 5%, 7.5%, and 10% palm oil bunch ash. The results showed that the largest CBR value was obtained at the addition of 10% of palm oil bunch ash, which was 7.493%.

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21

Laili, Alvina Praha, Akhmad Hasanuddin, and Luthfi Amri Wicaksono. "Perbandingan Tebal Perkerasan Menggunakan Nilai CBR Laboratorium dan CBR Lapangan (DCP) (JLS Jarit-Puger)." Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil 10, no. 1 (January 7, 2022): 11–28. http://dx.doi.org/10.33558/bentang.v10i1.2891.

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CBR (California Bearing Ratio) data is used to find out the level of subgrade density, so that a safe pavement thickness can be planned. The calculation of the CBR (California Bearing Ratio) can be done by testing CBR laboratory and DCP. CBR results have a high effect on the surface layer, so that the layer becomes thinner. This condition, if converted to the working price, will be more affordable and efficient. Therefore, this study aims to compare the results of laboratory CBR and Field Cbr (Dcp) to the thickness of flexible pavements in the Development of Trans South-South Java Road Project (TRSS) Lot 8 Jarit - Puger. The method used is Bina Marga Pd T-01-2002-B. Secondary data obtained by weigh bridges and service providers, namely PT. Brantas Abipraya (Persero). Field CBR value using DCP tool is 25.19% while Laboratory CBR value is 21.616%. The results of pavement thickness using Field CBR values for UR 10 years are D1 7.5 cm, D2 10cm, for UR 20 years D1 10 cm, D2 11 cm, for UR 30 years D1 11 cm, D2 12 cm, and for UR 40 years obtained D1 13 cm, D2 14 cm. The greater the CBR value, the thinner the pavement thickness.

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Rashed, Kamal Ahmed, Nihad Bahaaldeen Salih, and Tavga Aram Abdalla. "Prediction of California Bearing Ratio from Consistency and Compaction Characteristics of Fine-grained Soils." Al-Nahrain Journal for Engineering Sciences 24, no. 2 (December 31, 2021): 123–29. http://dx.doi.org/10.29194/njes.24020123.

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Soil’s characteristics are essential for the successful design of projects such as airports runway and flexible pavement. CBR (California Bering Ratio) is one of the significant soil characteristics for highways and airports projects. Thus, the CBR property can be used to determine the subgrade reaction of soil through correlations. Many of the soil geotechnical parameters such as compaction characteristics (Maximum Dry Density, MDD; Optimum Moisture Content, OMC), and consistency parameters (Liquid Limit, LL; Plastic Limit, PL; Plasticity Index, PI) can be in charge of changes that happen in soil CBR value. Soaked and/or non-soaked conditions of soils also affect CBR value. Hence, testing soils in a laboratory for CBR calculation is time-consuming that needs notable effort. Therefore, this study aims to generate some useful correlations for soil’s CBR with compaction and consistency parameters for 85 samples of fine-grained soils. The study trials were applied on natural soil samples of various places in Sulaimani Governorate, Northern Iraq. Statistical analysis has been carried out by using SPSS software (Version 28). Soaked CBR is counted, which is important for conditions such as rural roads that remain prone to water for few days. Based on the statistical analysis, there is a significant correlation between LL, PL, PI, MDD, and OMC with CBR as the dependent variable as a single variable equation with R2 of 0.7673, 0.5423, 0.5192, 0.6489, and 0.51, respectively. In addition, the highest value of R2 correlation was obtained between CBR value with consistency and compaction properties as a multiple regression equation with R2 of 0.82. The obtained equations for correlation purposes are successfully achieved and can be used, notably, to estimate CBR value.

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Dyas, Amalia Varyezqa, Gerard Aponno, and Armin Naibaho. "ANALISIS PENAMBAHAN PASIR DAN SEMEN TERHADAP NILAI CBR TANAH DASAR DESA SUKODADI KABUPATEN LAMONGAN." Jurnal JOS-MRK 2, no. 3 (September 20, 2021): 261–66. http://dx.doi.org/10.55404/jos-mrk.2021.02.03.261-266.

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Soil is a factor that can affect the structure of road construction. The CBR value is one of the parameters to determine the bearing capacity of the soil, if the CBR value is high then the soil bearing capacity is good, while if the CBR value is low then the soil needs to be stabilized. The purpose of this thesis is to determine the characteristics of the soil, determine the CBR value of the soil before and after stabilization, develop an implementation method and budget plan for the stabilized earthwork. This research includes water content test, density test, specific gravity test, grain analysis with hydrometer, limit Atterberg test, compaction test (modified), and CBR test (modified, soaked-unsoaked). In this test, variations of the addition of sand and cement were 5%, 10%, 15%, 20%, and 25% of the dry weight of the soil, respectively. From the test results, showing soil classification according to AASHTO A-7-6 with a value of soaked CBR 2.98%. Variations addition of sand and cement by 5% is used as a soil stabilization with the value of soaked CBR 26.31%. Stabilization work using Soil Stabilizer/Pulvi Mixer, Watertank Truck, Motor Grader, Vibro Roller, Sheepfoot Roller, Dump Truck, etc. with a Budget Plan of IDR. 6,505,291,980 (Six Billions Five Hundred Five Millions Two Hundred Ninety One Thousands Nine Hundred Eighty Indonesian Rupiahs) .

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Nuryasin, Dwi, Gerard Aponno, and Moch Sholeh. "PERBANDINGAN ANTARA PENGGUNAAN KAPUR DAN ABU SEKAM PADI UNTUK STABILISASI TANAH DASAR." PROKONS Jurusan Teknik Sipil 12, no. 1 (July 17, 2019): 50. http://dx.doi.org/10.33795/prokons.v12i1.152.

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The subgrade used for road construction should have a good bearing capacity, because the loads applied on the road construction are static and dynamic loads. If the CBR (California Bearing Ratio) value low so the subgrade of bearing capacity is not good. The purpose is to get the results of physical of the original soil, get the value of CBR laboratory of the original soil, get the CBR laboratory that has been stabilized using lime and rice husk ash, find out the optimum needs of lime and rice husk ash.Four original soil samples each of lime and rice husk had to go through an experiment by using 5%, 8%, 10% and 12% of lime and rice husk ash. The experiment results in water content w = 58.12%, weight of the soil γt= 1.44 grm/cm3, specific gravity Gs=2.11, Liquid Limit LL = 67.28%, Plastic Limit PL=54.06%, Plasticity Index =13.21%, maximum dry matter weight = 1.342 gr/m3 CBR= 5.13% physical properties of original soil; medium plasticity properties; 10% maximum CBR value at 69.046% lime; 10% maximum CBR value at 8.476% rice husk ash. Keywords: lime, rice husk ash, stabilization, CBR

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25

Bhupathi, Sridhar, Jayasree Kuchu, and M. V. S. S. Sastri. "A Study of Cost Comparison of Flexible Pavement Using Different Soils." IOP Conference Series: Earth and Environmental Science 1084, no. 1 (October 1, 2022): 012058. http://dx.doi.org/10.1088/1755-1315/1084/1/012058.

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Abstract India is home to the world’s second-largest road network. It has a diverse range of soil types, each with its own set of conditions and characteristics, on which the road network is built. IRC: 37-2018 was used for the Design and Cost Analysis of Flexible Pavement for five distinct types of soils: Black cotton soil, Alluvial soil, Sandy soil, Red Laterite soil, and Murram soil. The Resilient modulus which depends on CBR value of the soil has been found to influence the pavement thickness, strength and performance. The project’s cost is determined by the pavement thickness, which again is determined by the soil’s CBR value. By employing a soil with a high CBR value, the project’s pavement thickness and cost will be decreased. On poor or problematic soils, soil stabilisation techniques should be employed to improve CBR value and save project expenses. According to the findings, employing the CBR value improves the pavement’s strength and hence saves time when planning a pavement.

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Li, Tianguo, Lingwei Kong, and Bingheng Liu. "The California Bearing Ratio and Pore Structure Characteristics of Weakly Expansive Soil in Frozen Areas." Applied Sciences 10, no. 21 (October 27, 2020): 7576. http://dx.doi.org/10.3390/app10217576.

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The California Bearing Ratio (CBR) of weakly expansive soil is specially relevant to its expansibility. The mechanisms affecting the bearing strength, in terms of the CBR, of weakly expansive soil that could be used as embankments filler are worth studying. In the present study, the effects of compaction energy on the compaction characteristics and CBR value were investigated. Additionally, the pore size distributions of soils with different compaction degrees were studied with nuclear magnetic resonance (NMR), and the effect of freeze–thaw cycles on the pore size distribution of soils with different compaction degrees was considered. Subsequently, the mechanisms influencing the CBR were analyzed at both the macroscale and microscale. A linear relationship between the CBR value and compaction degree was determined, characterizing the gradual variation of expansive soils with different moisture contents. With increasing freeze–thaw cycles, the volume of micropores decreased and mesopores increased, causing the CBR value to decrease. The expansion was a dominant factor for the CBR values. The CBR values rose with an increase in micropores and decreased with an increase in pore volume. It was considered that the tested weakly expansive soil could be used as an embankment filler in frozen areas.

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Wibowo, Dian Eksana, and Endaryanta Endaryanta. "PEMANFAATAN LIMBAH KARBIT DAN PASIR SEBAGAI USAHA PERBAIKAN TANAH LEMPUNG MENGGUNAKAN UJI CBR DAN KONSOLIDASI DENGAN PEMADATAN LABORATORIUM." INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur 13, no. 2 (December 5, 2017): 178–88. http://dx.doi.org/10.21831/inersia.v13i2.17181.

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ABSTRACT Many cases of buildings such as highways, parking areas, buildings, damaged / cracked and undulating and excessive sets resulting from clay soil behavior on the ground. The ugly nature of this soil technique can actually be reduced for example by soil stabilization. Chemical stabilization can be by mixing clays with cement, lime, or waste carbide and sand. The experimental method research was conducted on clay from Prambanan by mixing waste of carbide and sand. Mixing is done through 3 modes: direct mix, sand-lime columns, and layer. These objects are then tested for CBR and Consolidation test. The result of this research is CBR value, and Cc Cr value. The results showed that: Based on CBR-test the results obtained: a) CBR-soaked value will rise up to 93.8% (from the original 2.12% to 4.11%) with Layer 3cm mode. b). The CBR-soaked value can rise 45.7% (from the original 2.12% to 3.09%) with the 1.5-inch column mode. c) The CBR-unsoaked value will fall slightly to 1.7% (from the original 11.26% to 11.07%) in the layer mode. d) The CBR-unsoaked value could rise 3.2% (from the original 11.26% to 11.62%) in column mode. Based on the Consolidation test obtained: a) The Cc Compression Index value of the soil will decrease if the clay is mixed with sand + carbide waste. The more the mixture of sand + carbide waste (up to 15%) then the value of Cc will decrease further. The percentage decrease in the value of Cc is 108.7% (from the original 0.215 to 0.103). b) Recompression Coefficient Value / Cr ground development will decrease if clay is mixed with sand + carbide waste. The more the mixture (up to 15%) then the value of Cr will decrease further. Cr value percentage of Cr is very big, that is 233.% (from the original 0.010 to 0.003). This result indicate that this methods will improve the clay soil, namely : a) increase the strength of soil, b) decrease (drastic) the compressibility / expandsivity of clay soil. Keywords : CBR, waste-carbide, clay, consolidation. ABSTRAK Banyak kasus bangunan semisal : jalan raya, areal parker, gedung, yang rusak/retak-retak dan bergelombang dan setlemen berlebih yang diakibatkan oleh perilaku/sifat tanah lempung di tanah dasar. Sifat teknik tanah yang jelek ini sebenarnya bisa direduksi misalnya dengan stabilisasi tanah. Stabilisasi kimiawi bisa dengan cara mencampur lempung dengan bahan semen, kapur, atau limbah karbit dan pasir. Penelitian metode eksperimen ini dilakukan pada lempung dari Prambanan dengan cara dicampur limbah karbit dan pasir. Pencampuran ditempuh melalui 3 mode yaitu : mix langsung, kolom pasir-kapur, dan layer. Benda-benda- uji ini lalu diuji CBR dan uji Konsolidasi. Hasil penelitian ini berupa nilai CBR, dan nilai Cc Cr. Hasil penelitian menunjukkan bahwa :Berdasarkan uji-CBR diperoleh hasil : a) Nilai CBR-soaked akan naik sampai 93,8% ( dari asli 2,12% menjadi 4,11%) dengan mode Layer 3cm. b). Nilai CBR-soaked bisa naik 45,7% (dari asli 2,12% menjadi 3,09%)dengan mode kolom 1,5 inci. c) Nilai CBR-unsoaked akan turun sedikit sampai 1,7% (dari asli 11,26% menjadi 11,07%) pada mode layer. d) Nilai CBR-unsoaked bisa naik 3,2% ( dari asli 11,26% menjadi 11,62%) pada mode kolom. Berdasarkan uji Konsolidasi diperoleh : a) Nilai Indek Compressi Cc tanah akan menurun jika lempung dicampur pasir + limbah karbit. Makin banyak campuran pasir + limbah karbit (sampai 15%) maka nilai Cc akan makin menurun. Prosentase penurunan nilai Cc adalah sebesar 108,7% ( dari aslinya 0,215 menjadi 0,103 ). b) Nilai Koefisien Rekompressi / pengembangan tanah Cr akan menurun jika lempung dicampur pasir + limbah karbit. Makin banyak campurannya (sampai 15%) maka nilai Cr akan makin menurun. Prosentase penurunan nilai Cr adalah amat besar, yaitu sebesar 233,3 % ( dari aslinya 0,010 menjadi 0,003 ).Hasil ini menunjukkan bahwa cara ini akan memperbaiki tanah lempung, yaitu : a) menaikkan (sedikit) kuat dukung tanah tidak terendam , b) amat menurunkan ekspansivitas tanah lempung. Kata kunci: CBR, limbah-karbit, lempung, konsolidasi.

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Cernușca, Lucian. "Adjustment of Value-Added Tax." CECCAR Business Review 3, no. 7 (July 31, 2022): 24–34. http://dx.doi.org/10.37945/cbr.2022.07.03.

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Țilică, Elena Valentina, and Radu Ciobanu. "The Time Value of Money." CECCAR Business Review 1, no. 6 (June 30, 2020): 38–42. http://dx.doi.org/10.37945/cbr.2020.06.05.

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Alam, S., F. Fahriani, and Y. Apriyanti. "Improvement of bearing capacity of clay that is stabilized with bamboo charcoal powder." IOP Conference Series: Earth and Environmental Science 926, no. 1 (November 1, 2021): 012101. http://dx.doi.org/10.1088/1755-1315/926/1/012101.

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Abstract A building construction must be built on the soil with good bearing capacity. Increasing of bearing capacity of the soil can be done by adding material of soil stabilizer. Bamboo charcoal powder was used in this study as a stabilizer for clay. The percentage of the addition of bamboo charcoal powder to clay soil in this study was 5%, 10%, and 15%. The California Bearing Ratio (CBR) test was carried out on original clay and stabilized clay to determine the bearing capacity of the soil. The results of this study as showed an increase in the CBR value of each percentage of the addition of bamboo charcoal powder. The highest CBR value was the addition of 15% bamboo charcoal powder with an increase in the CBR value of the original clay by 82.87%. The increase in the CBR value of the soil indicates that there is an increase in the bearing capacity of the clay due to the addition of bamboo charcoal powder

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Kuswaya, Wawan, Wahyudi Marsiano, Syafalni Syafalni, and Jonbi. "Jambi and Palembang clay soil stabilization for pavement matrix in road construction by using Portland cement type I." MATEC Web of Conferences 276 (2019): 05005. http://dx.doi.org/10.1051/matecconf/201927605005.

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The need for a pavement matrix in road construction, especially in Sumatra area, is now more difficult and expensive because the deposit materials are concentrated in Java and most of them are not available. For this reason, soil stabilization is a way out of this problem. On this basis it is necessary to conduct stabilization research with highly active stabilization material by using Portland cement type I. The soil to be stabilized is clay soil which is derived from the areas of Jambi and Palembang and which has a low CBR value less than the requirement for sub base or pavement (< 10%), with the expected CBR value of stabilization to be suitable for road construction. This research covers physical and soil mechanical properties which are compaction parameter and CBR value with 3 days of dry curing time and 4 days of soak curing time using ASTM test procedure. Variations of cement addition were used of 6%, 8%, and 10% for the clay soil from Palembang and 8%, 10%, and 12% for the clay soil from Jambi, by percentage of dry weight of the sample test. The results of this study showed that the CBR value significantly increased with the addition of cement, with Palembang soil CBR value rising from 3.46% to 130.74% and Jambi soil CBR value rising from 7.20% to 206.43% respectively.

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Muda, Anwar. "Perbandingan Cbr dan Ucs Tanah Lempung Distabilisasi Pasir dan Semen." Anterior Jurnal 16, no. 1 (December 1, 2016): 84–89. http://dx.doi.org/10.33084/anterior.v16i1.79.

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California Bearing Ratio (CBR) is the ratio between load penetration of a substance against a standard material with the depth and penetration of the same speed. While Unconfined Compression Strength (UCS) is the amount of axial load per unit area at the time of the test specimen to collapse or when the axial strain reaches 20%. This study aimed to compare the CBR and UCS clay stabilized sand and cement for the pavement. The results showed that the CBR value increases, the value rises with increasing UCS cement mix. Then when the stabilization of clay with a mixture of 12% sand and 10% cement values obtained UCS at 9.06 kg/cm2 and CBR of 66% thus, stabilization of clay Bukit Rawi qualify for base down the highway because of the value of UCS 9.06 kg/cm2 > UCS 6 kg/cm2 and CBR of 66% > 20%. UCS and CBR rise in value is due to that the addition of semen into adhesive media when it reacts with water. Media adhesive is then solidified and formed a hard mass so it would hold weight.

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Cahyadi, Hendra, and Nirwana Puspasari. "Pemanfaatan Garam Sebagai Bahan Stabilisasi Tanah Lempung di Kalimantan Tengah." Media Ilmiah Teknik Sipil 6, no. 1 (December 1, 2017): 33–43. http://dx.doi.org/10.33084/mits.v6i1.258.

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Clay soils generally have low CBR and UCS values. Has poor characteristics. In Central Kalimantan the prices of CBR and UCS are low. The soil of clay by its predominance is fine grain easily by air. Some efforts to improve the soil are carried out by stabilizing the soil. One of the clay stabilizing ingredients that can be used is salt. The use of salt as a soil stabilizing agent can provide better benefits compared to other ingredients such as chemicals, sand and semen. The aim of the study was to determine the values of CBR and UCS Soil in Central Kalimantan before and after stabilization using salt. The study was conducted at the Land Mechanics Laboratory of the University of Muhammadiyah Palangkaraya. Samples of clay soil will be given in 6 (six) Regencies in Central Kalimantan Province. Tests carried out on clay are CBR tests and tests before and after stabilization with salt. The salt mixture released is 5, 10,15,20,25% and 30% of the dry weight of the clay. Based on the results of the study indicate that the original land CBR value between 3.90% to 4.75%, can be referred to as land that has a poor / low carrying capacity. Then after stabilizing 5% to 15%, the CBR value increased to reach 5% to 9%. However, after being mixed with salt as much as 20% to 30%, the soil CBR value is adjusted significantly. From this it can be explained that the CBR value reaches the maximum value with a salt rate of 10% to 15% of the weight of the soil.

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Sas, Wojciech, Andrzej Głuchowski, and Maciej Miturski. "Studies on resilient modulus value from cyclic loading tests for cohesive soil." Annals of Warsaw University of Life Sciences – SGGW. Land Reclamation 49, no. 2 (June 1, 2017): 117–27. http://dx.doi.org/10.1515/sggw-2017-0010.

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Abstract In this article the cyclic CBR test as a reference method in determination of resilient modulus (Mr) is confronted with results of cyclic triaxial and unconfined uniaxial cyclic test. The main idea of conducted experiments is establish relationship between cyclic loading tests in testing of natural subsoil and road materials. The article shows results of investigation on cohesive soil, namely sandy silty clay, commonly problematic soil in Poland. The results of repeated loading triaxial test resilient modulus were displayed in order to compare them with cyclic CBR test results by using the Mr–Ө model. Some empirical correlation between factors obtained from triaxial test or uniaxial unconfined cyclic test and cyclic CBR test was introduced here. The behavior of resilient modulus was also examined in this paper.

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35

Xing-xing, Shen, Cao Wei-wei, and Li Kai. "Predicting CBR value of stabilized pond ash with lime and lime sludge using multivariate adaptive regression splines." Engineering Research Express 3, no. 4 (December 1, 2021): 045036. http://dx.doi.org/10.1088/2631-8695/ac3c9f.

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Abstract In this study, multivariate adaptive regression splines (MARS) model with order two and three were developed for predicting the California bearing capacity (CBR) value of pond ash stabilized with lime and lime sludge. To this aim, the model had five variables named maximum dry density, optimum moisture content, lime percentage, lime sludge percentage, and curing period as inputs, and CBR as output variable. MARS-O3 has the best results, which its R2 stood at 0.9565 and 0.9312, and PI 0.0709 and 0.1061 for the training and testing phases, respectively. In both developed models, the estimated CBR values in training and testing stages specify acceptable agreement with experimental results, representing the workability of proposed equations for predicting the CBR values with high accuracy. Comparison of two developed equations supplied that MARS-O3 has a better result than MARS-O2. Based on error curves, the MARS-O3 model results in the lowest error percentage in the CBR predicting process, providing roughly accurate prediction than those of the rest developed methods specified. Therefore, MARS-O3 could be recognized as the proposed model.

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Mustofa, Akhmad, and Herry Widhiarto. "Stabilisisasi Tanah Lempung Ekspansif Dengan Campuran Arang Kayu di Desa Pajeruan Kecamatan Kedungdung Kabupaten Sampang." EXTRAPOLASI 19, no. 01 (June 30, 2022): 57–65. http://dx.doi.org/10.30996/ep.v19i01.6692.

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Abstrak Tanah lempung ekspansif merupakan tanah yang memiliki daya dukung rendah dan kembang susut yang tinggi. Tanah sering tidak dapat langsung digunakan, karena secara alamiah tanah memiliki sifat-sifat fisis dan mekanis tertentu yang terbatas. Tujuan penelitian ini adalah untuk mengetahui klasifikasi tanah lempung ekaspansif natural, untuk mengetahui prosentase campuran yang dibutuhkan, untuk mengetahui karakteristik tanah, untuk mengetahui nilai kepadatan tanah, untuk mengetahui nilai CBR. Oleh karena itu diperlukan suatu stabilisasi agar nilai Konsistensi, Proctor test, dan CBR menjadi lebih baik sehingga dapat digunakan sebagai tanah dasar dalam suatu konstruksi. Pengujian yang dilakukan meliputi pengujian berat jenis, batas cair, batas plastis, pengujian pemadatan, dan pengujian CBR. Tanah yang digunakan dalam penelitian ini berasal dari kawasan Keacamatan Kedungdung Kabupaten Sampang. Tanah tersebut termasuk kelompok CH dengan indeks plastisitasnya sebesar 40,4%. Prosentase penambahan Arang Kayu yaitu 0%, 2%, 4%, 6%, 8% terhadap berat kering tanah. Hasil pengujian proctor tanpa campuran didapat nilai OMC (Optimum Moisture Content) 14,5% dengan berat isi kering ( d) 1,718gr/cm³. Hasil pengujian CBR memperlihatkan bahwa nilai CBR terendam dari 0% sampai 8% yaitu 3,72%, 5,76%, 6,00%, 8,40%, 8,16%. Dengan demikian penggunaan arang kayu padi dalam penelitian ini prosentase 9,4% dengan nilai CBR 7% cukup efektif untuk menaikkan nilai CBR, sehingga dapat digunakan untuk konstruksi di lapangan. Abstract Expansive clay is a soil that has a low carrying capacity and high shrinkage growth. Soil often cannot be used directly, because naturally the soil has certain limited physical and mechanical properties. The purpose of this study is to find out the classification of naturally exclusive clay soils, to find out the percentage of mixture needed, to find out the characteristics of the soil, to find out the density value of the soil, to find out the value of CBR. Therefore a stabilization is needed so that the Consistency, Proctor test, and CBR values become better so that they can be used as subgrade in a construction. Tests carried out include specific gravity testing, liquid limits, plastic limits, compaction testing, and CBR testing. The land used in this study came from the East Longitude Kedungdung District Sampang Regency. The land included the CH group with a plasticity index of 40,4%. The percentage of addition of wood charcoal is 0%, 2%, 4%, 6%, 8% of the dry weight of the soil. The proctor without mixture test results obtained an OMC (Optimum Moisture Content) value of 18.58% with dry content weight (beratd) 1.718gr / cm³. CBR test results show that the CBR value is submerged from 0% to 8%, namely 3.72%, 5.76%, 6.00%, 8.40%, 8.16%, . Thus the use of wood charcoal in this study is 7% with a CBR value of 9.4% effective enough to increase the CBR value, so that it can be used for construction in the field.

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Hartono, Edi, and Gilang Permana Santoso. "Analisis CBR Tanah Clayshale Akibat Distabilisasi Semen." Bulletin of Civil Engineering 1, no. 2 (September 29, 2021): 49–54. http://dx.doi.org/10.18196/bce.v1i2.12415.

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Clay shale merupakan batuan lunak yang memiliki potensi masalah pada kekuatan dan durabilitas bila tersingkap. Perbaikan tanah diperlukan bila digunakan sebagai lapis dasar jalan. Salah satu metodenya adalah stabilisasi menggunakan semen. Penelitian ini bertujuan untuk mengetahui perbandingan nilai CBR dan pengembangan clay shale sebelum dan sesudah penambahan semen. Semen yang ditambahkan sebesar 10% dari berat total tanah kering. Semen dicampur dengan metode dry mix dan spray mix. Pengujian CBR menggunakan 3 variasi pemadatan yaitu 10, 25, 56 kali pukulan. Hasil penelitian menujukkan bahwa penambahan semen 10% pada 56 pukulan akan meningkatkan nilai CBR 38,40% dan menurunkan pengembangan 0,60%. Nilai CBR dengan metode dry mix lebih tinggi dibandingkan dengan metode spray mix.Clay shale is a soft rock that has potential problems in strength and durability when exposed. Soil Improvement Required when used as the subgrade. One of the repair methods is stabilization using cement. This study aims to determine the value of CBR and clay shale swelling after the addition of cement. Cement added by 10% of dry soil weight. The cement is mixed by dry mix and spray mix methods. CBR testing uses three variations of compaction 10, 25, 56 blows. The results showed that adding 10% cement and 56 blows increased the CBR value by 38.40% and decreased the swelling by 0.60%. The CBR value with the dry mix method is higher than the spray mix method.

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Elisza, Mitha, Mardiah Mardiah, and Haslen Oktarianty. "Analisis Pengaruh Parameter Kompaksi Terhadap Nilai CBR Berdasarkan Standar dan Kriteria Jalan Tambang PT Bukit Asam Tbk. Tanjung Enim." MINERAL 4, no. 2 (October 31, 2019): 58–64. http://dx.doi.org/10.33019/mineral.v4i2.1596.

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This study analyzes the effect of compacting parameters on CBR values based on PT Bukit Asam Tbk's standards and criteria. The problem behind this research is that the overburden target at the TAL-West mining site to the South sump disposal is not affected by the speed of the transport equipment which is caused by the damaged road because the carrying capacity does not reach the standard so the circulation time increases. Therefore it is necessary to analyze the effect of compacting on CBR values based on company standards and criteria to meet the production target in April 2019 of 1,500,000 BCM, while the realization only reaches 1,379,160 BCM. The research method used is a linear regression method that analyzes the influence and relationship of independent variables such as material physical properties, compacting parameters and dependent variables, namely CBR values. The results of this study are that the physical properties of material have a relationship and influence on CBR values. Compaction parameters have a relationship with CBR values such as small dry volume weight so CBR value increases while optimum water content is large, CBR value decreases. Based on the evaluation of company standards and criteria, the best material in the B2C-22 sample with water content of 9.49%, density of 2.77, CBR value of 74.87% of the type of inorganic clay with light ash.

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39

Mora L., Otto, Michel Murillo A., Tiana Rosania A., Abraham Castañeda A., Rosa Pinto C., and Andrea Padilla M. "Analysis of CBR design value selection methods on flexible pavement design: Colombia case study." International Journal of Engineering & Technology 9, no. 2 (May 7, 2020): 509. http://dx.doi.org/10.14419/ijet.v9i2.30628.

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A comparative analysis was carried out to observe the variation of a flexible pavement structural thickness, due to the use of different meth-ods to calculate the CBR design value, as an essential variable to estimate the Subgrade Resilient Modulus (Mr) through an empirical corre-lation. The Asphalt Institute Method and the Mean Criterion Method were applied to calculate de Design CBR value of a homogeneous roadway division from a representative track section located in the Bolivar Department, Colombia. As a result, the Design Percentiles of the CBR design unit were expanded for the Asphalt Institute method, thus, allowing the approach of more reliable and safe designs, considering that this method limits the selection percentiles to three traffic levels.

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Suardi, Enita, Zulfira Mirani, Silvianengsih Silvianengsih, Oni Guspari, and Desmon Hamid. "Pemanfaatan Limbah Penambangan Bukit Kapur Untuk Stabilisasi Tanah Lempung ( Clay )." Jurnal Ilmiah Rekayasa Sipil 18, no. 2 (October 31, 2021): 167–74. http://dx.doi.org/10.30630/jirs.v18i2.675.

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Soil stabilization by adding new materials is one of the alternatives to soil repair that can improve the properties of the soil, namely by mixing new materials and soil that is then compacted. Waste left over limestone hill mining,among others in the form of materials with various sizes of granules. This study aims to review the effect of the addition of limestone hill mining waste material on the density and value of the California Bearing Ratio (CBR) of clay soil. Tests conducted only on a laboratory scale with variations in the increase in limestone hill mining waste levels are 0%, 5%, 10%, and 15% to the total weight of the mixture. Laboratory CBR testing is performed under optimum water content conditions. The results showed that the stabilization of soft soils using limestone hill mining waste, can increase the density and value of soil CBR. The most optimal level of use of limestone hill mining waste and which provides the highest CBR value is for the addition of 5%of limestone hill mining waste with a CBR value of 26.5%.

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Kumar, Sanjeev, Anil Kumar Sahu, and Sanjeev Naval. "Influence of Jute Fibre on CBR Value of Expansive Soil." Civil Engineering Journal 6, no. 6 (June 1, 2020): 1180–94. http://dx.doi.org/10.28991/cej-2020-03091539.

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Construction of structures on expansive soil is highly risky due to its susceptible behavior towards differential settlements. Different soil stabilization techniques including soil reinforcement have been adopted to improve the properties of the unsuitable soils. In this present study, randomly distributed jute fibres have been used to improve geotechnical properties of expansive soil collected from South Delhi (India). California Bearing Ratio (CBR) tests were carried out on the expansive soil blended with jute fibres. Jute fibres of length 10 mm and 30 mm were included in different percentages viz. 0.25, 0.50, 0.75, 1.00, 1.25 and 1.50 by the dry weight of the soil. The test results indicate that the inclusion of randomly distributed jute fibres significantly improves the CBR value of the soil. The Optimum value of fibre content is found to be 1.25%. An improvement of 226.92% in CBR value of the reinforced soil as compared to unreinforced soil has been observed at the optimum jute fibre content. Since Jute is agricultural waste, the present study provides a cost-effective solution to problematic clayey soils.

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42

Ahmad Ravi, Hurul 'Ain, Betti Ses Eka Polonia, and M. Hanif Faisal. "ANALYSIS OF LATERITE SOIL WITH PORTLAND CEMENT MIXED VARIATIONS AND THE EFFECT ON THE CBR UNSOAKED." Jurnal Gradasi Teknik Sipil 5, no. 2 (December 23, 2021): 60–73. http://dx.doi.org/10.31961/gradasi.v5i2.1205.

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Ketapang and Kayong Utara Regency have road construction that often suffers damage before the planned life age caused by the behavior of expansive clay. The subgrade is a fundamental structure in building road construction because the subgrade will support traffic loads or construction loads. The strength and durability of the pavement structure road will depend on the properties and bearing capacity of the subgrade. Practically soil stabilization is a reinforcement engineering against foundation or subgrade by using mixed materials. Therefore, different soil improvement variations are needed. Based on the test result, the CBR value of Sukadana initially gets a 2.95% point. The CBR value for the 6% and 10 % mixture, respectively, gets 17.14% and 25.02%. The CBR value of Sungai Melayu Rayak originally get 4.65% point. Then, for the 6% and 10% mixture, the CBR values increased by 13.78% and 18%. The value of the bearing capacity of the highway soil construction can be know from the results of CBR testing on each variation. The CBR also can measure the strength of the soil. The addition of cement to the earth tends to increase the bearing capacity of the ground. It is because cement can function as a binder between soil particles with chemical compounds contained in cement.

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Sugianto, Agus, Irna Hendriyani, Gunaedy Utomo, and Rahmat Rahmat. "ANALISIS STABILISASI TANAH LEMPUNG LUNAK MENGGUNAKAN MATERIAL SEMEN SEBAGAI BAHAN CAMPURAN." Jurnal Ilmiah Teknik Sipil TRANSUKMA 4, no. 2 (June 19, 2022): 114–23. http://dx.doi.org/10.36277/transukma.v4i2.135.

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Dalam suatu proyek konstrusi khususnya pekerjaan jalan harus memiliki daya dukung tanah yang baik, karena beban yang bekerja adalah beban statis dan beban dinamis. Salah satu parameter yang dapat kita ketahui apakah daya dukung tanah dasar itu baik atau tidak yaitu dengan mengetahui nilai CBR nya. Karena seringkali tidak ada pilihan untuk material timbunan, sehingga tanah dengan plastisitas tinggi seperti tanah jenis lempung digunakan sebagai material timbunan, sedangkan persyaratan Standart dari Bina Marga untuk nilai CBR tanah timbunan tidak kurang dari 6%, maka salah satu usaha yang akan dilakukan dalam perbaikan tanah yaitu dengan metode stabilisasi kimiawi menggunakan bahan adiktiv yaitu semen portland. Variasi semen yang digunakan 0%, 5%, 10% dan 15% berdasarkan berat tanah dan umur perendaman selama 4x24 jam, dengan kondisi air optimum. Pengujian yang dilakukan meliputi pengujian sifat fisik tanah asli dan sifat mekanik tanah. Dari hasil penelitian laboratorium dapat diketahui bahwa nilai CBR tanah lempung mengalami peningkatan dengan bertambahnya prosentase semen dibandingkan dengan nilai CBR tanah asli. Nilai CBR maksimum pada prosentase semen 5% sebesar 22,78% dibandingkan dengan nilai CBR tanah asli sebesar 4,88%. In a construction project especially road works must have good ground bearing capacity, because the load that works is a static load and dynamic loads. One parameter that we can use to determine whether the soil bearing capacity is good or poor is by knowing the CBR value. Often there is no option for the hoarding material, While the standard requirements from Bina Marga for the CBR value of landfill are not less than 6%, one of the efforts to be made in soil improvement is the chemical stabilization method using an active ingredient, namely Portland cement. The variation of cement used is 0%, 5%, 10% and 15% based on soil weight and immersion age for 4x24 hour, optimum water condition. The test carried are include physical properties of the original soil and the mechanical properties of the soil. From the results of laboratory research, it can be seen that the CBR value of clay soil has increased with increasing the percentage of cement compared to the original soil CBR. The maximum CBR in 5% cement is 22.78%, the CBR value of the undisturbed soil is 4.88%

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Novianto, Dandung, Marjono Marjono, Moch Sholeh, and Novita Anggraini. "Performance Testing Of Sand And Lime As Subgrade Stabilizing Materials For Roads." INTEK: Jurnal Penelitian 9, no. 2 (October 1, 2022): 128. http://dx.doi.org/10.31963/intek.v9i2.4252.

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Soil stabilization is a method used to increase the carrying capacity of a layer of soil, by giving special treatment to that layer of soil. Soil is one of the factors that can affect the structure of road construction. The CBR value is one of the parameters to determine soil carrying capacity, if the CBR value is high then the soil carrying capacity is good, whereas if the CBR value is low then the soil needs to be stabilized. The purpose of this study was to determine the characteristics and classification of soil, determine the results of the grain gradation test, sieve analysis and hydrometer analysis, consistency limits (Atterberg limits) before and after stabilization, compaction results (Proctor) before and after stabilization, determine the CBR value of the soil before and after stabilization. This research included water content test, wet soil unit weight test, specific gravity test, sieving analysis, hydrometer analysis, Atterberg limit test, compaction test (Modification), and immersion CBR test and CBR without immersion. In this test, variations in the addition of 20% sand and lime content were 5%, 10% and 15% of the dry weight of the soil. From the test results, the original soil samples showed soil classification A-7-6 according to AASHTO with maximum dry density (MDD) values of 1.70 gr/cm3 1 day curing, 1.64 gr/cm3 7 days curing and 1.77 gr/cm3 for 14 days curing, there was an increase in the value of the maximum dry density (MDD) in the original soil stabilized with 20% sand and 5% lime, a value of 1.78 gr/cm3 was obtained for 1 day curing, 1.86 gr/cm3 cm3 7 days curing and 1.82 gr/cm3 14 days curing. From the test results, the original soil samples showed soil classification A-7-6 according to AASHTO with CBR values of soaked 3.15% 1 day curing, 3.68% 7 days curing and 4.21% 14 days curing, there was an increase Soaked CBR values on native soil stabilized with 20% sand and 5% lime obtained CBR values of 37.19% at 1 day curing, 42.10% 7 days curing and 30.29% 14 days curing.

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Ramakrishna, A. N., A. V. Pradeep Kumar, and Keerthi Gowda. "Complex CBR (of BC Soil-RHA-Cement Mix) Estimation: Made Easy by ANN Approach [a Soft Computing Technique]." Advanced Materials Research 261-263 (May 2011): 675–79. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.675.

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In past days many researchers have been worked on the expansive soil to determine the California Bearing Ratio (CBR) values in a conventional ways, which are time consuming and require lot of manual involvements. So we the authors of this research paper attempted to develop a soft computing technique to prognosticate CBR value by using Artificial Neural Network (ANN), a data driven technique. ANN is a mathematical model inspired from the human brain’s information-processing characteristics, including the parallel processing ability. Over the last few years, the use of ANN has increased in many areas of engineering. In particular have been applied to many geotechnical engineering problems and have demonstrated some degree of success. A review of the literature reveals that ANN has been used successfully in the pile capacity prediction, site characterization and so on. In the present study the Black Cotton (BC) soil has been stabilized by using Rice Husk Ash (RHA) and cement, several experiments have been conducted for different mix combinations under soaked condition. From the obtained results, it is observed that the CBR value of BC soil increases with the addition of RHA and cement combination. The soaked CBR value found to be maximum for the mix of BC soil + 15% RHA + 12% cement. The present study deals with collection of input data base from experimental results, ANN’s training and its testing are adopted to fix the appropriate weighted matrix (Illustrated in Fig (1)) which in turn Prognosticates the CBR value. Experimental results have been compared with the CBR values prognosticated by using ANN and comparison graphs also plotted (Illustrated in fig (4)). The results of this study will contribute for the prognostication of CBR, which will assist a geotechnical engineer in estimation of CBR, with minimum effort.

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46

Jose Manuel Palomino Ojeda, Billy Alexis Cayatopa Calderon, Lenin Quiñones Huatangari, and Wilmer Rojas Pintado. "Determination of the California Bearing Ratio of the Subgrade and Granular Base Using Artificial Neural Networks." International Journal of Engineering and Technology Innovation 13, no. 3 (July 4, 2023): 175–88. http://dx.doi.org/10.46604/ijeti.2023.11053.

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The objective of the research is to estimate the value of the California bearing ratio (CBR) through the application of ANN. The methodology consists of creating a database with soil index and CBR variables of the subgrades and granular base of pavements in Jaen, Peru, carried out in the soil mechanics laboratories of the city and the National University of Jaen. In addition, the Python library Seaborn is for variable selection and relevance, and the scikit-learn and Keras libraries were used for the learning, training, and validation stage. Five ANN are proposed to estimate the CBR value, obtaining an error of 4.47% in the validation stage. It can be concluded that this method is effective and valid to determine the CBR value in subgrades and granular bases of any pavement for its evaluation or design.

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Sumarno, Agung, Agus Mudo Prasetyo, Fazhar Akbar, Eko Widodo, Triastuti Triastuti, Maidina Maidina, Ananto Nugroho, Ismail Budiman, and Bambang Subiyanto. "Pemanfaatan Limbah Spent Bleaching Earth pada Stabilisasi Tanah Lempung dengan Clean Set Cement." Jurnal Teknologi Lingkungan 22, no. 1 (February 3, 2021): 104–10. http://dx.doi.org/10.29122/jtl.v22i1.4125.

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ABSTRACT The utilization of waste as soil stabilization materials is a solution to reduce the amount of waste and improve the building materials quality. This research is using Spent Bleaching Earth (SBE) materials from the palm oil industry waste. SBE can be reused to be pozzolan materials. This research aimed to investigate the SBE waste effect as an admixture on clay stabilization used 10% Clean Set Cements (CS-60) on density and California Bearing Ratio (CBR). A combination of CS-60 and SBE waste was expected to increase the CBR value of clay. Furthermore, SBE waste would decrease cementitious material for clay stabilization. Variation comparison of Clay : CS-60 : SBE on ST03, ST04, and ST05 were 67.5% : 10% : 22.5%; 45% : 10% : 45% and 22.5% : 10% : 67.5% respectively. The test was conducted on water content, density, and load penetration based on SNI 1744:2012. Generally, the CBR value of subgrade and improved subgrades oil with the moderate and good category are about 5-20%. As a result, the CBR value of ST 01 as original clay and ST 02 as clay with 10% CS-60 was 3.24% and 5.01%, respectively. Using SBE waste as an admixture material on clay stabilization increased CBR value better than clay stabilization used CS-60. ST03, ST04, and ST05 with CBR's value were 5.39%, 8.52%, and 17.99%, respectively. Furthermore, the density value decreased when SBE waste is used. Keywords : california bearing ratio, clay, clean set cement, spent bleaching earth, stabilization. ABSTRAK Pemanfaatan limbah sebagai bahan stabilisasi tanah lempung merupakan solusi dalam mengurangi jumlah limbah dan meningkatkan mutu dari bahan bangunan. Penelitian ini menggunakan material Spent Bleaching Earth (SBE) dari limbah industri pengolahan minyak kelapa sawit. SBE dapat dimanfaatkan sebagai material pozzolan. Penelitian ini bertujuan untuk mengetahui pengaruh limbah SBE sebagai bahan tambah pada stabilisasi tanah lempung yang menggunakan 10% Clean Set Cements (CS-60) terhadap densitas dan California Bearing Ratio (CBR). Kombinasi limbah SBE dengan CS-60 diharapkan mampu meningkatkan nilai CBR tanah lempung. Selain itu, juga mengurangi penggunaan bahan berbasis semen untuk stabilisasi tanah lempung. Variasi perbandingan tanah lempung : CS-60 : SBE yang digunakan pada sampel ST03, ST04, dan ST05 berturut-turut 67,5% : 10% : 22,5%, 45% : 10% : 45% dan 22,5% : 10% : 67,5%. Pengujian yang dilakukan meliputi pengujian kadar air, densitas, dan penetrasi beban yang mengacu pada SNI 1744:2012. Secara umum, nilai CBR tanah dasar dan tanah timbunan dengan kategori sedang dan baik berkisar antara 5-20%. Hasil penelitian ini memperlihatkan bahwa sampel ST01 yang berupa tanah lempung asli memiliki nilai CBR 3,24% dan sampel ST02 yang berupa tanah lempung yang distabilisasi dengan 10% CS-60 menghasilkan nilai CBR 5,01%. Penambahan limbah SBE dapat meningkatkan nilai CBR dengan nilai yang lebih tinggi bila dibanding dengan hanya distabilisasi dengan CS-60, hal ini terlihat pada sampel ST03, ST04, dan ST05 dengan nilai CBR berurutan sebesar 5,39%, 8,52%, dan 17,99%. Selain itu, penambahan limbah SBE juga akan menurunkan densitas dari tanah lempung. Kata kunci : california bearing ratio, clean set cement, spent bleaching earth, stabilisasi, tanah lempung.

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48

Phoak, Samnang, Ya-Sheng Luo, Sheng-Nan Li, and Qian Yin. "Influence of Submergence on Stabilization of Loess in Shaanxi Province by Adding Fly Ash." Applied Sciences 9, no. 1 (December 25, 2018): 68. http://dx.doi.org/10.3390/app9010068.

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In this study, the influence of fly ash (FA) content (0%, 10%, 20%, and 30%) on the alteration in the physical and mechanical parameters of loess is investigated. The influences of curing time (0, 14, and 28 days) and submergence and non-submergence conditions are analyzed as well. Analysis considers the variation in Atterberg limits (liquid limit, plastic limit, and plasticity index), compaction parameters (optimum moisture content (OMC), and maximum dry density (MDD)), unconfined compressive strength (UCS) stress, UCS strain, California bearing ratio (CBR) value, and swell potential. Results show that the application of FA-stabilized loess (FASL) is effective. Specifically, the MDD decreases and the OMC increases, the UCS stress increases and the UCS strain decreases, the CBR value improves and the swell potential declines, but Atterberg limits are insignificantly changed by the increase in the FA ratio compared with those of untreated loess. The UCS stress and CBR value are improved with the increase in curing time, whereas the UCS strain is negligible. FASL under submergence condition plays an important role in improving the effect of FA on the UCS stress and CBR value compared with that under non-submergence condition. The UCS stress and CBR value are more increased and more decreased than the UCS strain in submerged samples. Therefore, the application of FASL in flood areas is important for obtaining sustainable construction materials and ensuring environmental protection.

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49

Sitinjak, Jeremi, Fatma Sarie, and Okrobianus Hendri. "STABILISASI TANAH LEMPUNG MENGGUNAKAN PASIR PANTAI TERHADAP NILAI CBR." Jurnal Ilmiah Teknik Sipil TRANSUKMA 4, no. 1 (December 20, 2021): 45–52. http://dx.doi.org/10.36277/transukma.v4i1.90.

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Masalahan yang sering dijumpai dalam pelaksanaan pembangunan konstruksi adalah tidak selalu ditemuinya tanah dasar (subgrade) yang memiliki nilai CBR atau daya dukung yang memadai, sehingga perlu dilakukan stabilisasi. Pada penelitian ini mengambil sampel tanah dari daerah Kasongan Lama, Katingan Hilir, Kabupaten Katingan, Kalimantan Tengah. Maksud dari penelitian ini adalah untuk menganalisa jenis tanah dari nilai CBR tanah dengan penambahan Pasir Pantai Ujung Pandaran sebagai bahan campuran. Tujuan dari penelitian ini adalah mengetahui seberapa besar pengaruh penambahan pasir pantai pada tanah lempung terhadap nilai CBR. Penelitian ini menggunakan metode eksperimen dan analisis data di Laboratorium Mekanika Tanah, Fakultas Teknik Universitas Palangka Raya. Adapun penelitian yang dilakukan adalah 4 variasi yaitu 0%, 5%, 10% dan 15% dan pemeraman selama 3 hari. Setelah pengujian dan pengolahan data dilakukan didapat hasil jenis tanah menurut klasifikasi USCS digolongkan pada kelompok CH yaitu lempung organik dengan plastisitas tinggi sedangkan menurut klasifikasi AASTHO tanah termasuk kedalam kelompok A-7-6 yaitu tanah berlempung. Hasil pemeriksaan nilai CBR secara berturut-turut sesuai campuran sebagai berikut 3,25%; 4,05%; 6,10%; dan 7,30%. Dari hasil nilai CBR dapat terlihat bahwa penambahan pasir pantai pada tanah lempung menunjukkan peningkatan nilai CBR pada tanah lempung sesuai dengan peningkatan persentase campuran. The problem that is often encountered in the implementation of construction development is not always found subgrade that has a CBR value or adequate carrying capacity, so it needs to be stabilized. In this study, soil samples were taken from the Kasongan Lama area, Katingan Hilir, Katingan Regency, Central Kalimantan. The purpose of this study was to analyze the soil type from the CBR value of the soil with the addition of Ujung Pandaran Beach Sand as a mixed material. The purpose of this study was to find out how much influence the addition of beach sand to clay had on the CBR value. This study uses experimental methods and data analysis at the Soil Mechanics Laboratory, Faculty of Engineering, University of Palangka Raya. The research conducted was 4 variations, namely 0%, 5%, 10% and 15% and curing for 3 days. After testing and processing the data, the results obtained that the soil type according to the USCS classification was classified in the CH group, namely organic clay with high plasticity, while according to the AASTHO classification the soil was included in group A-7-6, namely loamy soil. The results of the examination of the CBR value successively according to the mixture as follows: 3.25%; 4.05%; 6.10%; and 7.30%. From the results of the CBR value, it can be seen that the addition of beach sand to clay soils shows an increase in CBR values in clay soils according to the increase in the percentage of the mixture.

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Agustian Arif, Muhammad Rayhan, A'isyah Salimah, and Putera Agung Maha Agung. "PENGARUH PENAMBAHAN SERBUK BATA MERAH TERHADAP NILAI CBR." PROKONS Jurusan Teknik Sipil 14, no. 2 (April 3, 2021): 47. http://dx.doi.org/10.33795/prokons.v14i2.273.

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Abstract Soil is a collection of minerals, organic matter and relatively loose sediments that are located above the bedrock. Based on the particle size, it is divided into four types, namely gravel, sand, silt and clay. The role of soil is very important in a construction because the soil functions as a support for the loads that are above it, so that the soil is expected to have a good bearing capacity. In this study, the soil taken is soft soil in Hambalang, Bogor where the soil conditions in the area are hard in the dry season and soft in the rainy season, so it is necessary to review the CBR (California Bearing Ratio) value. In this study, using waste from red brick as an additive to soft soil. CBR testing is appropriate (SNI 1744: 2012), with the CBR Laboratory test soaked and unsoaked. Along with the addition of% red brick powder, the CBR values of soaked and unsoaked (top and bottom) have increased, so that the addition of% content of red brick powder is 15% respectively got a value of 4.55% and 4.9% (soaked) and 17.94% and 19.70 (unsoaked). So, from this CBR test, it was found that the effect of adding red brick powder increases CBR tilapia soaked and unsoaked soft soil of Hambalang. Keywords: Soft Soil, Red Brick Powder,CBR soaked, CBR unsoaked

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