Gotowe bibliografie tematyczne / SPLIT TENSILE STRENGTHS

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Gotowa bibliografia na temat „SPLIT TENSILE STRENGTHS”

Autor: Grafiati

Data publikacji: 11 września 2023

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Artykuły w czasopismach na temat "SPLIT TENSILE STRENGTHS"

Oba, K. M., O. O. Ugwu i F. O. Okafor. "Predicting the split tensile strength of Saw Dust Ash - Fine aggregate concrete". Nigerian Journal of Technology 39, nr 1 (3.04.2020): 87–96. http://dx.doi.org/10.4314/njt.v39i1.9.

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The industrial waste, Saw Dust Ash (SDA), has played a key role in concrete mix research. It has served as an alternative or complementary material to some of the traditional materials of concrete. In this study, SDA was used to replace 5% of the fine aggregate (sand), as the other three ingredients, cement, granite, and water remained constant. Scheffe’s simplex lattice was used for five mix ratios in a {5,2} component mix, which resulted in additional ten mix ratios. Additional fifteen mix ratios were generated for verification and testing. The thirty concrete mix ratios were subjected to laboratory experiments to determine the 28 days Split Tensile Strengths. The results of the first fifteen Split Tensile strengths were used for the calibration of the model constant coefficients using Scheffe’s simplex approach, while those from the second fifteen were used for the model verification. A mathematical regression model was derived from the experimental results, with which the Split Tensile Strengths were predicted. The derived model was subjected to a two-tailed t-test with 5% significance, which ascertained the model to be adequate with an R2 value of 0.8099. The study revealed that SDA can replace 5% of fine aggregate and promote sustainability, without compromising the 28 days Split Tensile Strength. Keywords: Saw Dust Ash, Scheffe’s simplex lattice, Split Tensile Strength of concrete.

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Gunasekaran, M., i T. Palanisamy. "Effect of fly ash and bagasse ash on the mechanical properties of light weight concrete". Cement Wapno Beton 27, nr 2 (2022): 72–101. http://dx.doi.org/10.32047/cwb.2022.27.2.1.

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Light weight concrete is an important part in the concrete technology. The use of mineral additives in light-weight concrete, to replace fine aggregate with fly ash and bagasse ash, helps to reduce the cement content. The present investigation aims to meet the performance of light weight concrete, by adding fly ash and bagasse ash, as fine aggregate replacement additives. The strength properties such as cube compressive strength, cylinder compressive strength and split tensile strength were investigated after different ages, to find the optimum addition of mineral additives such as fly ash and bagasse ash, in concrete. The strengths were compared and the optimal replacement level of cement with fly ash and bagasse ash was found. The cylinder compressive strength and split tensile strength of light weight concrete were measured, at the same replacement levels of mineral additives, at the age of 28 days curing. The mathematical equations were proposed to achieve cube compressive and tensile strengths, cylinder compressive and tensile strength and cube compressive and cylinder compressive strengths, concerning typical strength.

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Biel, Timothy D., i Hosin Lee. "Magnesium Oxychloride Cement Concrete with Recycled Tire Rubber". Transportation Research Record: Journal of the Transportation Research Board 1561, nr 1 (styczeń 1996): 6–12. http://dx.doi.org/10.1177/0361198196156100102.

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Either portland cement or magnesium oxychloride cement was used as binders for concretes that incorporated fine rubber aggregate, ranging from 0 to 25 percent by volume. The concretes were tested for their compressive and split tensile strengths to determine whether the use of a magnesium oxychloride cement along with recycled tire rubbers would improve concrete properties. Failure of the concrete around the rubber particles was attributed to tension failure, leading to weak shear failure of the concrete matrix. Both portland and magnesium oxychloride cement concretes lost 90 percent of their compressive strength with 25 percent rubber by volume. The portland cement concrete retained 20 percent of its tensile strength, and the magnesium oxychloride cement concrete retained 35 percent of its tensile strength. Both compressive and tensile strengths of magnesium oxychloride cement rubber concrete were significantly higher than rubberized portland cement rubber concrete.

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Del Savio, Alexandre Almeida, Darwin La Torre i Juan P. Cedrón. "Experimental Volume Incidence Study and the Relationship of Polypropylene Macrofiber Slenderness to the Mechanical Strengths of Fiber-Reinforced Concretes". Applied Sciences 12, nr 18 (11.09.2022): 9126. http://dx.doi.org/10.3390/app12189126.

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An experimental study was conducted to examine the mechanical strengths of concretes with straight high-strength knurled polypropylene macrofibers. Incidences of concrete mechanical strengths were determined for three different fiber dosages and lengths. In addition, compressive, indirect-splitting-test tensile, and flexural strengths were determined through testing. The results showed no statistically significant correlation between the volume and length of fibers with the compressive strength of polypropylene fiber-reinforced concrete (PPFRC). However, there was a statistically significant correlation between the split tensile strength, the volume, and the length of the fibers when the volume was greater than 0.80%, and the length of the fibers was greater than 50 mm. Furthermore, the modulus of rupture increased when the volume of fibers was greater than 0.80% and the length of the fibers was 60 mm. Finally, equations were proposed to determine the tensile strength by split test and the modulus of rupture as a function of the mixture’s resistance without fibers, the fibers’ volume and length.

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Malagavelli, Venu, i Neelakanteswara Rao Paturu. "Polyester Fibers in the Concrete an Experimental Investigation". Advanced Materials Research 261-263 (maj 2011): 125–29. http://dx.doi.org/10.4028/www.scientific.net/amr.261-263.125.

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Construction field has experienced a growing interest in Fiber Reinforced Concrete (FRC) due to its various advantages. The disposal of industrial waste especially non biodegradable waste is creating a lot of problems in the environment. In the present investigation, an attempt has been made by using non biodegradable waste (polyester fibers) in the concrete to improve the crack resistance and strength. Concrete having compressive strength of 25MPa is used for this study. Samples were prepared by using various fiber contents starting from 0 to 6% of with an increment of 0.5% for finding Compressive strength, split tensile strength and flexural strengths. It is observed that, compressive strength, split tensile strength and flexural strengths of concretes is increasing as the fiber content is increased up to some extent.

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Widjajakusuma, Jack, Ika Bali, Gino Pranata Ng i Kevin Aprilio Wibowo. "An Experimental Study on the Mechanical Properties of Low-Aluminum and Rich-Iron-Calcium Fly Ash-Based Geopolymer Concrete". Advances in Technology Innovation 7, nr 4 (27.07.2022): 295–302. http://dx.doi.org/10.46604/aiti.2022.10525.

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Limited studies have been conducted on low-aluminum and rich-iron-calcium fly ash (LARICFA)-based geopolymer concrete with increased strength. This study aims to investigate the mechanical characteristics of LARICFA-based geopolymer concrete, including its compressive strength, split tensile strength, and ultimate moment. The steps of this study include material preparation and testing, concrete mix design and casting, specimen curing and testing, and the analysis of testing results. Furthermore, the specimen tests consist of the bending, compressive, and split tensile strength tests. The results show that the average compressive strength and the ultimate moment of the geopolymer concrete are 38.20 MPa and 22.90 kN·m, respectively, while the average ratio between the split tensile and compressive strengths is around 0.09. Therefore, the fly ash-based geopolymer concrete can be used in structural components.

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Hazairin, Erma Desmaliana, Bernardinus Herbudiman i Wira Yudha Saputra. "Mechanical properties of porous concrete with variations of coarse aggregate gradation". MATEC Web of Conferences 276 (2019): 01027. http://dx.doi.org/10.1051/matecconf/201927601027.

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Porous concrete is an innovation in sustainable concrete technology, which has high porosity concrete without fine aggregate. Porous concrete used in rain gardens, planter boxes, permeable pavements at urban open spaces could absorb rainwater so it can reduce run-off. This experimental study purposes to determine the compressive, split-tensile, flexural strengths, and permeability of porous concrete with various gradation of coarse aggregates. This study used a concrete mixture with coarse aggregate gradation variations of gap, continuous, and uniform on the water cement ratio of 0.4. The test specimens used three cylinders of 15x30cm for compressive and split-tensile strengths, except for uniform gradations used three cylinders of 10x20cm. Beam specimens of 15x15x60cm used for bending strength test by third point loading method. The tested mechanical properties are 7, 14, and 28 days-compressive strengths, 28 days split-tensile strength, and 28 days bending strength. The experimental results also show the average compressive strengths of porous concrete with variation of gradations of gap, continuous, and uniform for 28 days is 14.6 MPa, 13.0 MPa, and 10.6 MPa, respectively. Volumetric flow rate of porous concrete with gap, continuous, and uniform aggregate gradations is 28.4 ml/s, 32.1 ml/s, and 39.3 ml/s, respectively. The experimental results show that gap gradation is recommended due to its better compressive and flexural strengths. In porous concrete, aggregate gradations influence the air content. The highest air content results the lowest compressive strength of concrete. The designed air content should be controlled to maintain the expexted compressive strength of porous concrete.

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Ezihe, J. C., O. O. Ugwu i F. O. Okafor. "Mathematical Model to Predict Split Tensile Strength of Concretes in Crude Oil Contaminated Environments". Jurnal Kejuruteraan 34, nr 3 (30.05.2022): 401–9. http://dx.doi.org/10.17576/jkukm-2022-34(3)-07.

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Few concrete components used for constructions within the Niger Delta region of Nigeria are contaminated with crude oil to varying ranges. An investigation into the split tensile behaviour of concretes to crude oil when cured in 10% crude oil/water medium is carried out in this work. In this work, crude oil was used as a fifth ingredient of concrete mix which replaced 5% to 20% of the w/c. The four other components were cement, sand, granite, and water. A designed mix ratio of 1:2:4 with w/c of 0.5 was utilized as the initial component mix design. Scheffe’s simplex theory was used for the five mix ratios in a {5,2} experimental design. This gave rise to ten additional mix ratios and fifteen other additional mix ratios were generated for control purposes. These thirty concrete mix ratios were subjected to laboratory experiments to determine the 7 and 28 days split tensile strengths. The results of the first fifteen split tensile strengths were used for the calibration of the model constant coefficients, while the results from the second fifteen were used as control. A mathematical regression model was derived from the results, with which the split tensile strengths were developed. The derived model was subjected to a two-tailed t-test with 5% significance, which ascertained the model to be adequate with an R2 value of 0.9616 and 0.9227. The study revealed that crude oil presence in a concrete mix can be harmful as it reduces the split tensile strength of concretes.

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Odeyemi, S. O., M. A. Anifowose, R. Abdulwahab i W. O. Oduoye. "Mechanical Properties of High-Performance Concrete with Guinea Corn Husk Ash as Additive". LAUTECH Journal of Civil and Environmental Studies 5, nr 1 (27.09.2020): 131–45. http://dx.doi.org/10.36108/laujoces/0202/50(0131).

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Consideration on High Performance Concrete (HPC) has risen drastically because of the requirement for application of concrete volume with high strengths for construction work. In this study, the mechanical properties of HPC with Guinea Corn Husk Ash (GCHA) as supplement of cement was investigated. The proportioning of Ordinary Portland Cement (OPC) with GCHA is from 0 - 20%. Design of the concrete mix was done to achieve a characteristic strength of 50 N/mm². The chemical composition of the GCHA was determined using X-ray Fluorescence (XRF) Slump and compacting factor of fresh HPC were determined. Concrete cubes (for compressive strength), beams (for flexural strength) and cylinder (for split tensile strength) samples were cast and cured in water for 7 - 56 days. Density, compressive, flexural, and split tensile strengths were determined on the hardened HPC and were further examined using SEM analysis. Compressive strength at 56 days showed that control and inclusion of 5% GCHA gave strength 56.85 N/mm2 and 57.76 N/mm2, respectively above the designed target strength of 56.56 N/mm2 while inclusion of 10% GCHA met characteristics strength of 50 N/mm2. However, 5% GCHA-concrete had the highest flexural and split tensile strengths at 56 days of curing. Integration of 10% GCHA as replacement of OPC would produce concrete of higher strengths compared to conventional HPC at longer curing age. Based on the SEM results, uniform distribution of filler was obtained at 10% GCHA inclusion. At higher percentage of GCHA, resulting composite presents multiple and distinct grains with possible weak interfaces.

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Yuan, Jian Song, Dan Ying Gao i Lin Yang. "Research on Strength of Steel Fiber Reinforced Concrete at Low Fiber Volume Fraction Based on Binary Variance Analysis". Advanced Materials Research 742 (sierpień 2013): 243–48. http://dx.doi.org/10.4028/www.scientific.net/amr.742.243.

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Based on the strength tests, including compressive strength, split tensile strength, shear strength , of steel fiber reinforced concrete (SFRC) with different concrete strength grades (C20~C50) at low fiber volume fraction (0~0.7%), the influences of concrete strength grades and steel fiber volume on concrete strengths were studied, and the effect significance levels of the two factors was analyzed through the binary variance analysis. The results show that when the concrete strength grades are amongst C20 ~ C50 and steel fiber volume rates lie in the range 0~0.7%,the strengths of SFRC rises as concrete strength grade and steel fiber volume ratio increase ; the influence of concrete grade is more significant than that of steel fiber volume ratio on compressive strength and split tensile strength of SFRC; the influence of steel fiber volume fraction is less significant than that of concrete strength grades on shear strength of SFRC.

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Rozprawy doktorskie na temat "SPLIT TENSILE STRENGTHS"

Yin, Penghai. "Tensile Strength of Unsaturated Soils". Thesis, Université d'Ottawa / University of Ottawa, 2021. http://hdl.handle.net/10393/41841.

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Desiccation-induced soil cracking is of significant interest in several engineering disciplines, which include geotechnical and geoenvironmental engineering, mining engineering, and agriculture engineering. The hydraulic, mechanical, thermal and other physico-chemical properties of unsaturated soils can be predominantly influenced due to cracks. Reliable information of these properties is required for the rational design and maintenance of earth structures taking account of the influence the soil-atmosphere interactions (e.g., for expansive soil slopes, earth dams, and embankments). In spite of significant research studies published in the literature on the desiccation-induced cracks during the past century, the fundamental mechanism of crack initiation and propagation of soils induced by drying and shrinkage is still elusive. For this reason, the focus of this thesis is directed towards understanding the tensile strength of unsaturated soils which is associated with soil crack initiation criterion (i.e. maximum tensile stress criterion). Tensile strength is the key property of soils for interpreting the initiation of soil cracking from a macroscopic point of view. A semi-empirical model is proposed for predicting the tensile strength of unsaturated cohesionless soils taking into account the effect of both the negative pore-water pressure in saturated pores and the air-water interfacial surface tension in unsaturated pores. The proposed model is calibrated and validated by providing comparisons between the model predictions and the experimental measurements on 10 cohesionless soils (i.e. five sandy soils and five silty soils) published in the literature. The proposed model is simple and requires only the information of Soil-Water Characteristic Curve (SWCC) and Grain Size Distribution curve (GSD), which can be obtained from conventional laboratory tests. To investigate the influence of microstructure, a practical and reliable estimation approach for predicting the evolution of the microstructural void ratio of compacted clayey soils subjected to wetting and drying paths is proposed. The microstructural evolution of 13 examined soils were investigated quantitatively using the mercury intrusion porosimetry (MIP) results. The investigated soils include four high-plasticity clays, eight low-plasticity clays and a glacial till which is a relatively coarse-grained soil with some fines. Based on this study, a novel criterion has been developed for identifying different pore populations of compacted clayey soils. The “as-compacted state line” (ACSL) was proposed to estimate the initial microstructural void ratio based on the compaction water ratio. A constitutive stress is derived to interpret and predict the volumetric deformation of compacted clay aggregates. The linear elastic constitutive model is used for predicting the microstructural void ratio of the examined compacted soils following monotonic wetting and drying paths. The developed approach (i.e. the ACSL and the linear elastic constitutive model) is validated by providing comparisons between the predicted and interpreted microstructural void ratios for all the examined soils. In addition to the matric suction and microstructure, the confining pressure also influences the tensile strength of unsaturated compacted clayey soils. The tensile strength tests on a compacted clayey soil by both the direct method (i.e. triaxial tensile test) and the indirect method (i.e. Brazilian split test) were performed. It is found that the tensile strength increases as the compaction water content decreases for the range investigated in this study, which could be explained by the variation of the inter-aggregated capillary bonding force and the change in microstructure. The increase in the confining pressure has been found to induce the change in failure mode (i.e. from pure tensile failure mode to combined tensile-shear failure mode). In spite of limitations associated with the Brazilian split test, tensile strength is widely determined using this test due to the simple procedure of specimen preparation and wide availability of test equipment in conventional laboratories. However, the Brazilian tensile strength is found to overestimate the tensile strength of compacted specimens with water content greater than the plastic limit. This is due to the considerable plastic deformation associated with the ductile failure instead of brittle failure. In summary, this thesis is devoted to providing insight into the fundamental mechanisms associated with the desiccation-induced crack initiation by quantitatively investigating the various factors that influence the tensile strength of unsaturated soils, which include the matric suction, the microstructure, and the confining pressure from theoretical studies and laboratory investigations.

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Owens, Anthony Taylor Tippur Hareesh V. "Development of a split Hopkinson tension bar for testing stress-strain response of particulate composites under high rates of loading". Auburn, Ala., 2007. http://repo.lib.auburn.edu/Send%2002-04-08/OWENS_ANTHONY_54.pdf.

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UPADHYAY, SAGAR. "INFLUENCE OF MARBLE WASTE POWDER AS PARTIAL REPLACEMENT OF CEMENT IN CONCRETE". Thesis, 2020. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19589.

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Construction industry uses Portland cement which is known to be a heavy contributor to the CO2 emissions and environmental damage. Incorporation of industrial wastes like silica fume (SF) and fly ash (FA), marble powder as supplementary cementing materials (SCMs) could result in a substantial reduction of the overall CO2 footprint of the final concrete product .With increasing industrialization, the industrial byproducts (wastes) are being accumulated to a large extent, leading to environmental and economic concerns related to their disposal (land filling). Cement is an energy extensive industrial commodity and leads to the emission of a vast amount of greenhouse gases, forcing researchers to look for an alternative, such as a sustainable building practice. The present work is directed towards developing a better understanding on strengths characteristics of concrete using marble dust powder as a partial replacement of cement. Not much of the work has been carried out on the split tensile strength and flexural strength concrete using marble powder as partial replacement of cement so this Dissertation work is carried out with M40 grade concrete for which the cement is replaced by marble powder by 0%, 5%, 10%, 15%, 20% by weight of cement. For all the mixes compressive, split tensile strengths are determined at different days of curing. Only 3 cubes were casted for various percentage cement with marble powder for 28 days. The results of the present investigation indicate that marble dusts incorporation results in significant improvements in the compressive and split tensile strengths of concrete upto 10% of replacement.

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Części książek na temat "SPLIT TENSILE STRENGTHS"

Nanda, Anil Kumar, i Jaspal Singh. "Relationship Between Compressive Strength and Split Tensile Strength for Sustainable Concrete—A Case Study". W Lecture Notes in Civil Engineering, 733–40. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-9554-7_65.

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Abdurrahman, Habib, Gunawan Wibisono, Iskandar Romey Sitompul i Monita Olivia. "The Correlation Between Split Tensile and Flexural Strength with Compressive Strength of Crumb Rubber-Rice Husk Ash Concrete". W Lecture Notes in Civil Engineering, 581–92. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-7924-7_38.

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Yu, Z., H. Jing, Y. Gao, X. Wei i A. Wang. "Effect of Carbon Nanotubes on the Acoustic Emission Characteristics of Cemented Rockfill". W Lecture Notes in Civil Engineering, 513–19. Singapore: Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-3330-3_54.

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AbstractThe use of carbon nanotubes (CNTs) to reinforce cemented rockfill is attracting considerable interest due to the remarkable improvement in performance and the extremely low dose of the added nanomaterial. To reveal the enhancement mechanism of the CNTs on cemented rockfill, the acoustic emission (AE) characteristics of cemented rockfill specimens during the Brazilian split test were investigated. The results demonstrated that CNTs improved tensile strength by 17.2% and decreased the AE count. The nucleation and micropore-filling effects of the CNTs promoted the cement hydration reaction and formation of a denser structure, thereby improving resistance to loads. Meanwhile, finer pores avoid stress concentration, resulting in AE activity becoming more sparse. Finally, the AE b-value increased by 14.8%, which further indicated that the overall failure process was at a lower intensity.

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Safitri, Endah, Wibowo, Halwan Alfisa Saifullah i Farhan Gilang Septian. "The Effect of 12.5% Metakaolin and Variations of Silica Fume on Split Tensile Strength and Modulus of Rupture of High Strength Self-Compacting Concrete (HSSCC)". W Proceedings of the 5th International Conference on Rehabilitation and Maintenance in Civil Engineering, 1165–72. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-9348-9_103.

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Rojas, Eduardo. "Tensile Strength". W Towards a Unified Soil Mechanics Theory: The Use of Effective Stresses in Unsaturated Soils (Third Edition), 112–17. BENTHAM SCIENCE PUBLISHERS, 2022. http://dx.doi.org/10.2174/9789815050356122010010.

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In this chapter, the probabilistic porous-solid model is used to simulate the tensile strength of unsaturated soils tested at different water contents. The strength of unsaturated soils can be split into two parts: one related to the net stress and the other to suction stress. The strength generated by suction has its origin in the additional contact stresses induced to solid particles by water meniscus. This additional contact stress is called matric suction stress when it is solely related to matric suction. In such a case, the tensile strength of soils represents the matric suction stress of the material at that particular water content. The numerical and experimental comparisons of the tensile strength of unsaturated soils tested at different water contents show that the probabilistic porous-solid model can simulate this phenomenon quite accurately.

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Indhumathi Anbarasan, M., S. R. Sanjaiyan i S. Nagan Soundarapandiyan. "Geopolymer Concrete under Ambient Curing". W Advances in Geopolymers Synthesis and Characterization [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97541.

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Geopolymer concrete (GPC) has significant potential as a more sustainable alternative for ordinary Portland cement concrete. GPC had been introduced to reduce carbon footprints and thereby safeguarding environment. This emerging eco friendly construction product finds majority of its application in precast and prefabricated structures due to the special curing conditions required. Sustained research efforts are being taken to make the product suitable for in situ applications. The developed technology will certainly address the issues of huge energy consumption as well reduce water use which is becoming scarce nowadays. Ground Granulated Blast Furnace Slag (GGBS) a by-product of iron industries in combination with fly ash has proved to give enhanced strength, durability as well reduced setting time. This study investigates the effect of GGBS as partial replacement of fly ash in the manufacture of GPC. Cube and cylindrical specimens were cast and subjected to ambient curing as well to alternate wetting-drying cycles. The 28 day compressive strength, split tensile strength, flexural strength and density of GPC specimens were found. The study revealed increase in compressive strength, split tensile strength, density as well flexural strength up to 40 percent replacement of fly ash by GGBS.

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Janardhana, Kedri, Vikash Singh, Satyendra Narain Singh, T. S. Ramesh Babu, Samreen Bano i Sampath Boopathi. "Utilization Process for Electronic Waste in Eco-Friendly Concrete". W Sustainable Approaches and Strategies for E-Waste Management and Utilization, 204–23. IGI Global, 2023. http://dx.doi.org/10.4018/978-1-6684-7573-7.ch011.

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In this chapter, the authors discuss the utilization of e-waste in the concrete for civil construction activities. Various tests have been used to investigate the effects of e-waste mixed with concrete. The various percentages of e-waste have been mixed with concrete to improve the strength of buildings. An e-waste concrete beam has a maximum tensile strength of 6.23 MPa under sulfuric curing conditions, and the highest flexural strength at 10% e-waste replacement during the hydrochloride curing process. The compressive strength is at its highest value when e-waste replaces 10% of it. After 28 days of curing, the concrete cylinder's maximum split tensile strength was 15%. Thus, the e-waste could be effectively utilized for civil construction purposes to reduce its environmental impacts.

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"The water saturation effects on dynamic tensile strength in red and buff sandstones studied with Split Hopkinson Pressure Bar (SHPB)". W Advanced Materials, Structures and Mechanical Engineering, 177–80. CRC Press, 2016. http://dx.doi.org/10.1201/b19693-36.

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"Structural behaviour of tension type high strength bolted connection between web plate of wide flange section and split-T". W Behaviour of Steel Structures in Seismic Areas, 273–80. CRC Press, 2009. http://dx.doi.org/10.1201/9780203861592-43.

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Harada, Y., K. Ebato i A. Nomoto. "Structural behaviour of tension type high strength bolted connection between web plate of wide flange section and split-T". W Behaviour of Steel Structures in Seismic Areas. CRC Press, 2009. http://dx.doi.org/10.1201/9780203861592.ch36.

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Streszczenia konferencji na temat "SPLIT TENSILE STRENGTHS"

Gianetto, J. A., J. T. Bowker, R. Bouchard, D. V. Dorling i D. Horsley. "Tensile and Toughness Properties of Pipeline Girth Welds". W 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10399.

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The primary objective of this study was to develop a better understanding of all-weld-metal tensile testing using both round and strip tensile specimens in order to establish the variation of weld metal strength with respect to test specimen through-thickness position as well as the location around the circumference of a given girth weld. Results from a series of high strength pipeline girth welds have shown that there can be considerable differences in measured engineering 0.2% offset and 0.5% extension yield strengths using round and strip tensile specimens. To determine whether or not the specimen type influenced the observed stress-strain behaviour a series of tests were conducted on high strength X70, X80 and X100 line pipe steels and two double joint welds produced in X70 linepipe using a double-submerged-arc welding process. These results confirmed that the same form of stress-strain curve is obtained with both round and strip tensile specimens, although with the narrowest strip specimen slightly higher strengths were observed for the X70 and X100 linepipe steels. For the double joint welds the discontinuous stress-strain curves were observed for both the round and modified strip specimens. Tests conducted on the rolled X100 mechanized girth welds established that the round bar tensile specimens exhibited higher strength than the strip specimens. In addition, the trends for the split-strip specimens, which consistently exhibit lower strength for the specimen towards the OD and higher for the mid-thickness positioned specimen has also been confirmed. This further substantiates the through-thickness strength variation that has been observed in other X100 narrow gap welds. A second objective of this study was to provide an evaluation of the weld metal toughness and to characterize the weld metal microstructure for the series of mechanized girth welds examined.

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Tian, Dongqing, Li Shi, Libin Sun, Ke Shen i Kun Xu. "Experimental Study on Dynamic Tensile Strength of Graphite". W 2022 29th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/icone29-90670.

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Abstract Dynamic tensile strength is an important parameter in the design of graphite components for High Temperature Gas-Cooled Reactors (HTGR) to evaluate the integrity of core support structures. The Digital Image Correlation and Split Hopkinson Pressure Bar (DIC-SHPB) test system was used to perform the disc compression tests according to ASTM D8289-20 to study the dynamic splitting tensile strengths of graphites with different grain sizes. The fracture process was captured by a high-speed camera and the tensile strain was computed by DIC. The results show that the SHPB test method is capable of performing the disc compression tests of graphite. The dynamic tensile stress-strain curve of graphite underwent four stages: compression stage, near-elastic stage, crack development stage and crack non-stable extension stage. When the strain rate is in the range of 330 s−1 to 630 s−1, the dynamic tensile strength of graphite increases with increasing strain rate. The dynamic increase factor (DIF) of fine-grained graphite ranged from 1.05 to 1.2, while that of coarse-grained graphite was about 1.2 to 1.6. There is a large dispersion in the dynamic tensile strength of graphite when the strain rate is increased. It was found that the tensile strength of graphite improved considerably with increasing strain rate, while the fracture strain decreased slightly.

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Sato, Chiaki, i Kozo Ikegami. "Influence of Rates and Duration of Stress Waves on Residual Strength of Adhesively Bonded Joints After Single Impact or Repeated Impacts". W ASME 1999 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 1999. http://dx.doi.org/10.1115/imece1999-1192.

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Abstract Residual strength after Impact (RSAI) of adhesively bonded joints was investigated experimentally. Impact Loads were applied to the joints using a split Hopkinson bar equipment. Residual strength of the joints was measured by static tests after a single impact or repeated impacts. Tubular specimens, which included tubular butt joints, were used for the experiments. Since the shape of the specimens was similar to hats, they were called ‘hat specimens’. Materials for the specimens were carbon steel adherends and an epoxy resin adhesive. The hat specimens were subjected to impact loads by the split Hopkinson bar equipment that consisted of an input bar, an output tube and an air gun. The collision of strikers, which were accelerated by the air gun, to the end of the input bar caused compressive stress waves in the input bar. The compressive stress waves were changed to tensile stress waves in the hat specimen, and consequently high rate tensile loads could be applied to the joints. The impact tests were conducted with several conditions of maximum stress, duration and rate of impact loading. The maximum stress and the duration of the stress waves depended on the velocity and the length of the strikes, which could be selected. Stress rates were chosen by using buffers, which were inserted between the strikes and the input bar. Residual strengths of the joints after impact tests were smaller than the strength without impacts. However, the decrease of the strength was relatively small. The influence of the repeated impacts was remarkable on the decreases of the joint strength although the influence of the maximum stress, the duration and the rate of the impact loading were very small.

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Arun Kumar, M. "An Experimental Investigation of Lightweight Self Compacting Concrete with Replacement of Coarse Aggregate as Pumice Stone- A Review". W Sustainable Materials and Smart Practices. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901953-22.

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Abstract. Due to its unique properties as compared to ordinary concrete, lightweight concrete play a major role in construction sector. Here, this research explain the development of lightweight self-compact concrete by replacing the coarse aggregate together the pumice stone, which is used as a lightweight material in various proportions. An investigation on the effect of coarse aggregate on the partially replaced with pumice stone in lightweight self-compact concrete is carried out. The fresh and hard property of this lightweight self-compacting concrete have been studied and compared with the results of normal concrete. Pumice stone is used due to its special property such as unit weight, heat insulation property, resistance against fire when we combined with the coating substance the properties of this concrete has been improved. Several properties of lightweight self-compacting concretes such as unit weight, flow diameter, flow diameter after an hour, V-funnel and L-box tests, 28 days split- tensile strength, dry unit test, water absorption 7- and 28-day compressive strength, and ultrasonic pulse velocity test was investigated. According to the study, lightweight self-compacting concrete properties include flow strength, segregation resistance, and filling capability of fresh concrete. Pumice stone is used by replacing with natural coarse aggregate, at the levels of 20%, 40%, 60%, 80% by volume with fly ash and blast furnace slag minerals at the constant rate of 40%. 28 days compressive strength, dry unit weights, thermal conductivity in addition to ultra-sonic velocity of self-compacting concrete were obtained. The compression, flexural, and split tensile strengths of cubes, cylinders, along with prisms are tested for 7, 14, and 28 days. Results shows that pumice stone met the requirements for structural applications.

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Adamu, M. "Effect of steel fibres on the mechanical strengths of fly ash/GGBS based geopolymer concrete under ambient curing condition". W Advanced Topics in Mechanics of Materials, Structures and Construction. Materials Research Forum LLC, 2023. http://dx.doi.org/10.21741/9781644902592-41.

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Abstract. The production of concrete involves the use of huge quantity of cement which is the main binder material. However, cement production involves the use of high amount of embodied energy and reduce of embodied CO2 emission. Hence one of the alternatives is the use of concrete with zero cement called geopolymer. However, the main shortcoming of geopolymer is its higher brittleness and low modulus of elasticity compared to conventional cement concrete. This led to the addition of fibres to geopolymer. In this study, the effect of steel fibres addition on the mechanical strengths of ambient cured geopolymer concrete was investigated. 60% Fly ash class F and 40% GGBFS are used as binder materials to produce ambient geopolymer concrete of grade 30 MPa, which was activated by alkaline solution (mixture of sodium Hydroxide and sodium silicate) with a constant Molarity of Sodium Hydroxide as 10M without any cement. End hooked steel fibres of aspect ratio 35, were added to the geopolymer at 0%, 0.25% and 0.5% by volume fraction. The results findings showed that the workability of the geopolymer decreased with increase in addition of steel fibres. Ambient cured specimens yield good results and higher strength is observed due to high polymerization process. Furthermore, the compressive, split tensile and flexural strengths all improved significantly with increase in percentage of volume of steel fibres at any ambient curing period.

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S. K., Vidhya. "Strength Characteristics of Concrete by Partially Replacing Cement with Silica Fumes and Tile Dust". W The International Conference on scientific innovations in Science, Technology, and Management. International Journal of Advanced Trends in Engineering and Management, 2023. http://dx.doi.org/10.59544/qswf3816/ngcesi23p12.

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The concrete is a cement-based material which has become most popular and widely used in construction field such as highways, flyovers, buildings, dams etc. Now a days the consumption of concrete increased exponentially and structure without concrete cannot be imagined. Durability of concrete mainly depends upon the climatic condition which may likely to damage the concrete structures. To enhance the life against such problems it is necessary to improve the mechanical properties of the concrete. The use of pozzolanic in concrete and mortar was started with a view to reduce the cost, overcome the adverse effects of OPC and utilize waste products and by products of industrial activities which were providing harmful to environment, natural resources etc. Also, the use of pozzolanas improves several properties of mortar and concrete viz. workability, strength, resistance to cracks permeability and durability. Further the use of pozzolanas has resulted in the production of high- performance concrete. Owing to globalization, privatization and liberalization, the construction of important infrastructure projects are increasing in developing countries like India. Such development activities require large quantities of natural resources. This leads to faster depletion of natural resources on one side and manifold increase in cost of construction of structures on the other side, which is a major problem in construction sector today. In view of this people have started searching for suitable alternate materials which can be used either as an additive or as a partial replacement to conventional ingredients of concrete. Use of tile dust as partial replacement for cement in concrete is one such economical method. In the laboratory tests were conducted by partially replacing cement in concrete by tile dust as 0%, 10%, 20%, 30%, 40% & 50%. The development of compressive strength, split tensile strength and flexural strength of concrete at the age of 7, 28, 56 days are investigated. These strengths are compared with conventional concrete of the same mix proportions.

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Gebauer, Daniel, Steffen Marx i Gregor Schacht. "Testing Existing Structures – Compressive Strength and Tensile Split- ting Strength of the Lahntal Bridge Limburg". W IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2019. http://dx.doi.org/10.2749/guimaraes.2019.1619.

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In 2016, the Lahntal Bridge near Limburg was replaced by a new structure. The existing bridge was deconstructed on a formwork carriage. Before the deconstruction, more than 250 concrete cores and other specimens were taken from the existing structure. The samples are located all over the cross section and the length of the bridge. These specimens are examined for their material prop- erties.The investigations include the experimental determination of the compressive strength, the tensile splitting strength, the creep behaviour, the chloride ingress, fatigue tests and the anchoring behav- iour of the tendons. This paper deals with the compressive strength and the tensile splitting strength.The results of these tests are statistically evaluated by determining the mean value, the standard deviation and the coefficient of variation. In addition, it is examined whether there are any correla- tions between various material properties. The results are also compared to the normative expec- tations of Eurocode 2.

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"Mechanical Properties of Concrete Using Sugarcane Bagasse Ash and Coir Fibre". W The International Conference on scientific innovations in Science, Technology, and Management. International Journal of Advanced Trends in Engineering and Management, 2023. http://dx.doi.org/10.59544/qmig6347/ngcesi23p106.

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Concrete is the most extensively used construction material which consumes natural materials leading to environmental concerns in terms of utilization of raw materials and also emissions of CO2. The increase in cost of cement and scarcity in river sand also adds to the need of sustainable material which is also cost effective. Industrial wastes, such as blast furnace slag, rice husk ash, fly ash and silica fume are being used as supplementary cement replacement materials. Currently, it has been tried to utilize the large amount of bagasse ash, a fibrous residue obtained from sugar cane during extraction of sugar juice at sugarcane mills in concrete. Sugarcane bagasse ash is a waste product of the sugar refining industry which is already causing serious environmental pollution, which calls for urgent ways of handling the waste. Coir is strong in tension, hence it can be used a fiber reinforced material. Hardened concrete tests like compressive strength and split-tensile strength were undertaken showing a remarkable increase in strength of concrete as a percentage of bagasse ash replacement and addition of coir fiber as fibre reinforcement. This report presents the results of an experimental investigation on the mechanical properties of concrete incorporating sugarcane bagasse as hand coir fiber. This study is aimed to evaluate the strength of concrete by performing tests like compressive strength, split tensile strength and flexural strength of concrete

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"Effect of Saturation and Deformation Rate on Split Tensile Strength for Various Sedimentary Rocks". W International Conference Data Mining, Civil and Mechanical Engineering. International Institute of Engineers, 2015. http://dx.doi.org/10.15242/iie.e0215010.

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Samsunan, Astiah Amir, Inseun Yuri Salena, Lissa Opirina, Syifaul Rahmawati i Dista Julian Resi. "The influence of substitution of plastic-coated aggregate (PCA) on the compressive strength and split tensile strength of concrete". W ADVANCES IN FRACTURE AND DAMAGE MECHANICS XX. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0133427.

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Raporty organizacyjne na temat "SPLIT TENSILE STRENGTHS"

ULTIMATE STRENGTH, DUCTILITY AND FAILURE MODE OF HIGH-STRENGTH FRICTIONAL BOLTED JOINTS MADE OF HIGH STRENGTH STEEL. The Hong Kong Institute of Steel Construction, sierpień 2022. http://dx.doi.org/10.18057/icass2020.p.239.

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Further structural rationalization of steel bridge such as weight reduction of members is realizable by utilizing high strength steel. However, due to the high yield-to-tensile strength ratio, failure of connected members occur before the members in gross area has been plastic-deformed sufficiently. In this study, tensile tests of frictional bolted joint which varies geometrical configurations and grades of plate and bolts, were conducted to compare failure modes of high strength steel joint and mild steel joint and to investigate the relationship among ultimate strength, ductility and failure mode. From obtained results, failure modes of high strength steel joint were the same as those of mild steel joint and can be almost classified with the respective ratios of net cross-section failure resistance and plate shear failure resistance to bolt shear failure resistance. Ultimate resistance and ductility became highest in the case of split failure mode where these ratios were about 1.0 and they increased as the ratios decreased. Therefore, it’s concluded that these ratios should be less than 1.0 to induce split failure mode for making high strength steel joint be broken after the member has been plastic-deformed sufficiently.

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ULTIMATE STRENGTH, DUCTILITY, AND FAILURE MODE OF HIGH-STRENGTH FRICTIONAL BOLTED JOINTS MADE OF HIGH-STRENGTH STEEL. The Hong Kong Institute of Steel Construction, marzec 2023. http://dx.doi.org/10.18057/ijasc.2023.19.1.3.

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Further structural rationalization of steel bridges such as weight reduction of members can be realized by using high-strength steel. However, owing to the high yield-to-tensile strength ratio, failure of connected members occurs before the members in the gross area are plastic-deformed sufficiently. In this study, tensile tests of frictional bolted joints with various geometrical configurations and grades of plates and bolts were conducted to compare the failure modes of high-strength and mild steel joints and to investigate the relationship among ultimate strength, ductility, and failure mode. The results indicate that the failure modes of high-strength steel joints were the same as those of mild steel joints and can be almost classified with the respective ratios of net cross-section failure resistance and plate shear failure resistance to bolt shear failure resistance. Ultimate resistance and ductility were maximum in the case of split failure mode where these ratios were approximately 1.0; they increased as the ratios decreased. Therefore, it can be concluded that these ratios should be less than 1.0 to induce the split failure mode to enable the breaking of a high-strength steel joint after the member is plastic-deformed sufficiently.

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