Relevant bibliographies by topics / Subgrade soils

Academic literature on the topic 'Subgrade soils'

Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Contents

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Subgrade soils.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Subgrade soils"

1

Li, Cong, and Wei Lan. "Study on Moisture Modification for Resilient Modulus of Subgrade." Applied Mechanics and Materials 361-363 (August 2013): 1460–66. http://dx.doi.org/10.4028/www.scientific.net/amm.361-363.1460.

Full text
Abstract:
Subgrade resilient modulus of 3 typical soils, namely sand, silt and clay, have been measured under different conditions of 2 target dry density and 3 target water content by triaxial repeated-loading test. Analysis has been focused on the effect law of subgrade moisture and compaction for resilient modulus based on test results. Subgrade moisture has some impact on resilient modulus of test soils, especially on that of fine-grained soils. The influence degree of subgrde compaction depends on soil group. Coefficient of moisture modification has been introduced to characterize relationship between subgrade moisture and resilient modulus. Two-parameter Logistic model with inflexion control has been proposed according to the following basic rule. Coefficient of moisture modification usually increases or decreases along with the decrement or increment of subgrade moisture. And then variety rate of coefficient becomes small in state of high or low water content.
APA, Harvard, Vancouver, ISO, and other styles
2

Sawangsuriya, Auckpath, Tuncer B. Edil, and Peter J. Bosscher. "Modulus−suction−moisture relationship for compacted soils." Canadian Geotechnical Journal 45, no. 7 (July 2008): 973–83. http://dx.doi.org/10.1139/t08-033.

Full text
Abstract:
The ultimate parameter of interest in engineering design of compacted subgrades and support fills for highways, railroads, airfields, parking lots, and mat foundations is often the soil modulus. Modulus of compacted soils depends not only on dry unit weight and moisture but also on matric suction and soil structure (or fabric) resulting from the compaction process. However, these relationships in the as-compacted state (i.e., immediately after compaction) have not yet been extensively explored. This paper presents an experimental laboratory study of the shear modulus – matric suction – moisture content-dry unit weight relationship using three compacted subgrade soils. Compacted subgrade specimens were prepared over a range of molding water contents from dry to wet of optimum using enhanced, standard, and reduced Proctor efforts. A nondestructive elastic wave propagation technique, known as bender elements, was used to assess the shear wave velocity and corresponding small-strain shear modulus (Go) of the compacted subgrade specimens. The matric suctions were measured with the filter paper method. An empirical relation that takes into account the effect of compaction conditions is proposed for the Go – matric suction – molding water content relationship of compacted subgrade soils.
APA, Harvard, Vancouver, ISO, and other styles
3

Antonovskaya, Galina N., Nikita Y. Afonin, Irina M. Basakina, Natalia K. Kapustian, Boris G. Basakin, and Aleksey V. Danilov. "Possibilities of seismic methods for the estimation of a railway roadbed state under the conditions of the far north." Transportation systems and technology 3, no. 3 (September 15, 2017): 133–61. http://dx.doi.org/10.17816/transsyst201733133-161.

Full text
Abstract:
The article presents results of monitoring state of railway subgrade using seismic methods in the Far North area. Purpose: The purpose of the studies is to find out reasons of subgrade subsidence in turfed soils of Onezhsky District of Arkhangelsk Oblast. Methodology: Studying soils in foundations of subgrade, a complex of active and passive methods was used, including: seismic exploration of refracted waves, multi-channel analysis of ground waves, and engineering seismic analysis based upon spectrum analysis of seismic noises. This complex enabled considering and estimating the system “subgrade-soils of foundations”. Results: A relative high capacity of weak soils, probably containing turf, lying under subgrade. Sections of increased water saturation in subgrade soils were found out. Loads from passing trains and resonant effect in weak soils cause its compression resulting in emergence of subsidence. Resonant effects whereby are not that strong, whereas passing trains have a more significant impact on the state of subgrades. Practical significance: Elaboration of technology of quick estimation of state of railway subgrade for immediate detection of a dangerous defect at an early stage of its development is a topical and acute challenge.
APA, Harvard, Vancouver, ISO, and other styles
4

Yang, Shu-Rong, Wei-Hsing Huang, and Yu-Tsung Tai. "Variation of Resilient Modulus with Soil Suction for Compacted Subgrade Soils." Transportation Research Record: Journal of the Transportation Research Board 1913, no. 1 (January 2005): 99–106. http://dx.doi.org/10.1177/0361198105191300110.

Full text
Abstract:
The variations of resilient modulus with the postconstruction moisture content and soil suction for cohesive subgrade soils were evaluated. In particular, the effects of relative compaction of the subgrade on the suction and resilient modulus were investigated. To simulate subgrade soils at in-service conditions, soil specimens were compacted at various relative compactions and optimum moisture content and then saturated to equilibrium moisture content to test for resilient modulus and soil suction. The filter paper method was used to measure the total and matric suctions of two cohesive soils. Test findings demonstrated that resilient modulus correlated better with the matric suction than with total suction. Matric suction was found to be a key parameter for predicting the resilient modulus of cohesive subgrade soils. A prediction model incorporating deviator stress and matric suction for subgrade soil resilient modulus was established.
APA, Harvard, Vancouver, ISO, and other styles
5

Zhang, Yu, Xuerui Chen, Meisi Zou, Runze Tian, Yunlong Hou, and Bingbing Han. "Impact of Isothermal Layering on the Stability of Saline Soil Subgrade in Cold Regions." Geofluids 2022 (April 4, 2022): 1–13. http://dx.doi.org/10.1155/2022/3141964.

Full text
Abstract:
In order to determine the influence of heat on the stability of the saline soil subgrade slope in cold regions. Firstly, four typical representative saline soils were selected as subgrade fillers, and geotextiles were added at the bottom of the subgrade as a study subject. A two-dimensional numerical model for the temperature field of subgrade soil was established based on COMSOL Multiphysics. Secondly, combined with the main strength parameters of subgrade soil at different temperatures, an isothermal stratification-strength parameter function calculation model was proposed. Then, the SLOPE/W module in GeoStudio is used to stratify the established subgrade model according to isotherms and calculate the stability safety factor of saline soil subgrades in cold regions under different months, slopes, and subgrade heights, respectively. Finally, the influence of submergence at the foot of the slope on the stability of the subgrade slope is discussed. The results show: After the cold season coming, with the decreasing of temperature, the stability of HC-1 and HC-2 saline soil subgrade slope increased to different extents when the ground temperature dropped to -10°C. When the local temperature dropped below -10°C, the stability has slight decline; CS-1 and CS-2 saline soil subgrade in the ground temperature dropped to 10°C (HC-1 and HC-2 denote two groups of saline soil with high chloride-salt content (≥15%) and low sulfate salt content (≤0.5%), whereas CS-1 and CS-2 denote two groups of saline soil with low chloride-salt (≤5%)), the slope stability was significantly improved, and the stability of CS-1 increases slightly with further decrease in temperature.
APA, Harvard, Vancouver, ISO, and other styles
6

Lee, Woojin, N. C. Bohra, A. G. Altschaeffl, and T. D. White. "Resilient modulus of cohesive soils and the effect of freeze–thaw." Canadian Geotechnical Journal 32, no. 4 (August 1, 1995): 559–68. http://dx.doi.org/10.1139/t95-059.

Full text
Abstract:
Resilient modulus tests were performed on five cohesive soils sampled from the subgrades of in-service pavements. The stress at 1% strain in the unconfined compression test (Su1.0%) was found to be a good indicator of the resilient modulus (MR), and an empirical relationship between MR and Su1.0% was obtained. The proposed relationship itself is not affected by the changes in subgrade after construction and, therefore, is applicable to as-compacted and in-service subgrade conditions. Closed-system freeze–thaw tests were also performed and the effect of freeze–thaw on the resilient modulus was studied. There is a negligible effect of freeze–thaw, without ice lens formation, for soils having values of Su1.0% less than 8 psi (55 kPa), while the effect of freeze–thaw increases as the value of Su1.0% increases. For example, a soil with a value of Su1.0% greater than 15 psi (103 kPa) would exhibit more than 50% reduction in resilient modulus due to the effect of freeze–thaw. The resilient modulus of frozen cohesive soil is independent of the repeated deviator stress. Key words : resilient modulus, subgrade, pavement, freeze–thaw.
APA, Harvard, Vancouver, ISO, and other styles
7

Zheng, Xiaomeng, Zhushan Shao, Nannan Zhao, Chenglong Li, and Kui Wu. "Performance Evaluation of Tunnel-Slag-Improved High Liquid Limit Soil in Subgrade: A Case Study." Materials 15, no. 5 (March 7, 2022): 1976. http://dx.doi.org/10.3390/ma15051976.

Full text
Abstract:
The application of tunnel-slag-improved high liquid limit soil as filling materials in subgrade is a green environmental technology. This study explored the influence of tunnel slag mixing on the physical and mechanical properties of improved soils, based on the engineering background of Liyu highway, Guangxi Province, China. Firstly, the optimal moisture content, maximum dry density, shear strength parameters, California bearing ratio (CBR) and resilience modulus of plain and tunnel-slag-improved high liquid limit soils were experimentally determined. Results showed that the direct utilization of untreated soil was unacceptable in subgrade practice. A significant enhancement of integrity of high liquid limit soils could be obtained by tunnel slag mixing, and the value of 15% was determined as the optimal tunnel slag content in soils, leading to improved soil performance meeting the specification requirements. Then, numerical simulation on the stability of subgrade slope of tunnel-slag-improved soils at the content of 15% was conducted. It also reported the long-term subgrade settlements. The feasibility of utilization of tunnel slag in improving properties of high liquid limit soils was further validated. Finally, a good application of tunnel-slag-improved high liquid limit soil as subgrade filling materials in Liyu highway was achieved. The findings in this study could provide useful guidance for similar engineering.
APA, Harvard, Vancouver, ISO, and other styles
8

Li, Chi, and Yu Gao. "Experimental Studies on Wind Erosion Mechanism of Aeolian Soils Subgrade Slope for Desert Highway." Advanced Materials Research 243-249 (May 2011): 2401–8. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.2401.

Full text
Abstract:
Wind erosion mechanism is studied through interior wind erosion wind tunnel experiment for desert highway. The anti-wind erosion ability of Aeolian soil subgrade slope is equivalent to the variation of microstructure characteristics and shearing strength of Aeolian soil. Microstructure characteristics will be quantified analysis through scanning electron microscope and image analysis software for subgrade slope, and microstructure parameters are picked-up for wind erosion fore-and-aft. Aeolian soil’s Shearing strength and wind erosion depth are investigated at different position of windward slope during a long-time wind-blown. Then, wind erosion mechanism of Aeolian soils subgrade slope is clarified from two aspects of micro and macro, wind erosion influence depth is determined for certain environmental condition. Taking desert highway subgrade as an example, the results indicate that: the disturbance to the flow field enhances with the increase of slope ratio and subgrade height, wind erosion of the windward slope is severe. The anti-wind erosion ability on windward slope is weak obvious with the decreasing of soil’s water containing, the increasing of wind velocity and the blow time prolong. Shearing strength of Aeorian soil is gradually decreased from slope surface to its interior, from bottom to top of windward slope. According to environmental condition local, when average wind velocity is 11m/s and natural water containing is 2%, wind erosion depth is about 15mm on the top of slope which is 1/11 of subgrade height, relative to 10mm on the mid of slope. The conclusions drawn from micro and macro are proved the wind erosion mechanism of Aeolian soils subgrade slope perfectly.
APA, Harvard, Vancouver, ISO, and other styles
9

Li, Jue, Jianlong Zheng, Yongsheng Yao, Junhui Zhang, and Junhui Peng. "Numerical Method of Flexible Pavement considering Moisture and Stress Sensitivity of Subgrade Soils." Advances in Civil Engineering 2019 (May 30, 2019): 1–10. http://dx.doi.org/10.1155/2019/7091210.

Full text
Abstract:
Weaknesses of the subgrade structure induce the asphalt surface diseases and shorten the service life of flexible pavement. However, the resilient modulus (Mr) of subgrade soils is difficult to be evaluated directly since the subgrade is hidden and covered by the granular or asphalt layer. This study aimed to establish a numerical approach to predict the dynamic behavior of flexible pavements considering the stress sensitivity and moisture variation of subgrade soils. Firstly, 2D FEM simulations of flexible pavements were performed with half-sine loadings. A constitutive model of subgrade soils was proposed to incorporate soil suction and octahedral shear stress. It was validated using the laboratory triaxial test data of 3 selected soils. Then, the developed model was programmed by the user-defined material subroutine (UMAT) in the software ABAQUS. Subsequently, the validity of FEM model was verified by the laboratory tank model. Finally, the effect of moisture contents on the dynamic response of pavement structures was studied by tensile stress and vertical compressive strain. Results show that the surface deflection of the FEM model is similar to that of the actual pavement structure with the R2 of 98.44%. The developed UMAT program is reliable since the distribution of Mr in the FEM model is influenced by the stress and moisture condition of subgrade soils. When the moisture content is increased by 63%, the average Mr of subgrade soils is decreased by 18.7%. Meanwhile, the stiffness softening of subgrade soils increases vertical compressive strain at the top of the subgrade and the tensile stress at the bottom of the surface layer. It is interesting that the developed model can be applied to analyze the fatigue cracking of both subgrade and surface layers in the future.
APA, Harvard, Vancouver, ISO, and other styles
10

Omowumi, Ademila. "GEOTECHNICAL INFLUENCE OF UNDERLYING SOILS TO PAVEMENT FAILURE IN SOUTHWESTERN PART OF NIGERIA." Malaysian Journal of Sustainable Environment 4, no. 1 (September 30, 2018): 19. http://dx.doi.org/10.24191/myse.v4i1.5604.

Full text
Abstract:
Roads in Nigeria are usually constructed without in-depth knowledge of the subsoil that serves as the foundation for the road elements. Road failures are often associated to poor construction materials or inadequate design without cognisance of the underlying soils. Engineering properties of ten bulk soil samples collected from the subgrade of Arigidi/Oke-Agbe highway were investigated to determine their suitability for highway pavement. Results show that all the subgrade soils below the failed locations have higher plasticity indices, which is an indication of their high swelling potential, and they are classified as A-7-6 clayey soils with high-water adsorption capability (16.1 – 22.4%) compared to subgrade soils from the stable locations. Low compacted density (1325 – 1928 Kg/m3), extremely poor CBR values; 8 – 31% (unsoaked) and 3 – 8% (soaked) which indicate percentage reduction in strength of the soils up to 77% on exposure to excessive moisture and the predominance of fines (> 59%) in the soils are responsible for the degree of instability. Furthermore, soft to low stiffness (49 – 131 kN/m2) and poor permeability of the subgrade materials underlying the pavement result to the failure characteristics witnessed. This study shows that the suitability and behaviour of subgrade soil is dependent on its engineering properties.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Subgrade soils"

1

Sekulovic, Dejan. "Identification of modulus of subgrade reaction of soils at pile/soil interface." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0015/MQ52659.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Orman, Marc Elliot 1958. "A study of bedding intrustion into low strength subgrade." Thesis, The University of Arizona, 1989. http://hdl.handle.net/10150/558102.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Han, Zhong. "Modelling Stiffness and Shear Strength of Compacted Subgrade Soils." Thesis, Université d'Ottawa / University of Ottawa, 2016. http://hdl.handle.net/10393/35059.

Full text
Abstract:
Compacted soils are frequently used as subgrade for pavements as well as commercial and residential buildings. The stiffness and shear strength properties of compacted soils, which are collectively denoted as Ω in this thesis, fluctuate with moisture content changes that result from the influence of environmental factors such as the evaporation and infiltration. For example, mechanistic pavement design methods require the information of resilient modulus (MR), which is the soil stiffness behavior under cyclic traffic loading, and its variation with respect to the soil moisture content determined from laboratory tests or estimation methods. Significant advances have been made during the last five decades to understand and model the variation of the Ω with respect to soil moisture content and soil suction (s) based on the principles of mechanics of unsaturated soils. There are a variety of models presently available in the literature relating the Ω to the s using different approaches. There are however uncertainties extending these models for predicting Ω - s relationships when they are used for a larger soil suction range. In addition, the good performance of these models are only valid for certain soil types for which they were developed and calibrated. Studies presented in this thesis are directed towards developing a unified methodology for modelling the relationship between the Ω and the s using limited while easy-to-obtain information. However, more emphasis has been focused on the MR - s relationships of pavement subgrade soils considering the need for the application of the mechanistic pavement design methods in Canada. The following studies have been conducted: (i) State-of-the-art review on existing equations in the literature for the MR - s relationships is summarized. A comparison study is followed to discuss the strengths and limitations of these equations; (ii) A unified methodology for modelling the Ω - s relationships is proposed. Experimental data on 25 different soils are used to verify the proposed unified methodology. The investigations are applied on small strain shear modulus, elastic modulus, and peak and critical shear strength. Good predictions are achieved for all of the investigated soils; (iii) Performance of the proposed methodology is examined for the MR - s relationships using experimental data of 11 subgrade soils. Reasonably good predictions are achieved for all of the subgrade soils; (iv) Extensive experimental investigations are conducted on the MR - s relationships for several subgrade soils collected from various regions in Canada. Experimental results suggest non-linear variation in the MR with respect to s, moisture content and the external stress. The measured results are modelled using the proposed methodology with adequate success; (v) Additional experimental investigations are performed to determine the variation of the elastic modulus (E) and unconfined compression strength (qu) with the s and the gravimetric moisture content (w) for several Canadian subgrade soils. An approach, which is developed extending the proposed unified methodology, is used to normalize the measured MR - w, E - w and qu - w relationships. It is shown that the normalized MR - w, E - w and qu - w relationships exhibit remarkable similarity and can be well described using the proposed approach. Such similarity in the normalized Ω - moisture content relationships are also corroborated using the experimental data on several other soils reported in the literature. The proposed unified methodology alleviates the need for the determination of the Ω - s relationships which requires elaborate testing equipment that needs the supervision of trained personnel and is also time-consuming and expensive. In addition, experimental programs in this thesis provide detailed experimental data on the MR, E, qu, and soil-water characteristic curves of Canadian subgrade soils. These data will be helpful for the better understanding of the hydro-mechanical behavior of the Canadian subgrade soils and for the implementation of the mechanistic pavement design method in Canada. The simple tools presented in this thesis are promising and encouraging for implementing the mechanics of unsaturated soils into conventional geotechnical engineering practice.
APA, Harvard, Vancouver, ISO, and other styles
4

Mao, Baimin. "Predicting resilient modulus of highway subgrade soils in Ohio." Ohio : Ohio University, 1995. http://www.ohiolink.edu/etd/view.cgi?ohiou1179257407.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Parker, John Wesley. "Evaluation of Laboratory Durability Tests for Stabilized Subgrade Soils." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2393.pdf.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Lee, Jangguen. "The Behavior of Pore Water Pressure in Cohesive Subgrade Soils." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1364216774.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Ouf, Mohamed El-Sadek Abdel Rahman. "Stabilisation of clay subgrade soils using ground granulated blastfurnace slag." Thesis, University of Leeds, 2001. http://etheses.whiterose.ac.uk/327/.

Full text
Abstract:
Roads constructed on expansive clays may be adversely affected by the behaviour of the clay. Expansive clays suffer volume change due to changes in moisture content which causes heaving, cracking and the break up of the road pavement. Stabilisation of these types of soil is necessary to suppress swelling and increase the strength of the soil and thus partially decrease the thickness of road pavement layers. The use of by-product materials for stabilisation has environmental and economic benefits. Ground granulated blastfurnace slag (GGBS), a by-product material in Egypt, and lime are used in the current work to stabilise samples of a clay soil similar to a typical Egyptian clay soil. This test soil comprises 80% River Aire soil and 20% calcium montmorillonite. The main objectives of this research were to investigate the effect of GGBS, with and without lime, on the engineering behaviour (plasticity characteristics, compaction, unconfined compressive strength (UCS) and swelling potential) of the test soil and to identify the reaction products of the stabilised materials to determine the mechanisms by which changes in engineering properties are obtained. In order to achieve these objectives, extensive laboratory investigations were carried out. Various mixes (up to 10% GGBS by dry weight of the test soil and up to 30% replacement by hydrated lime) were prepared and cured under two representative conditions {20°C with 90-100% relative humidity (CCI) and 35° C with 50-60% relative humidity (CC2)} for up to 12 months. Compaction and plasticity were measured soon after mixing, the swelling potential and UCS were measured after longer curing periods. Four analytical techniques {X ray diffraction, scanning electron microscopy, differential thermal analysis and nuclear magnetic resonance (NMR)} were used to identify the reaction products of the clay fraction of the test soil mixed with various amount of GGBS and lime. This pure clay test soil was used to ease identification of the reaction products. The investigations showed that generally the engineering properties (UCS, swelling, plasticity) improved with the addition of GGBS and with increasing curing period and temperature. The addition of lime resulted in a dramatic improvement within the test ranges covered in the programme. The maximum dry density, MDD, decreased and the optimum moisture content, OMC, increased with increasing GGBS and lime content. The major changes in the UCS and swelling behaviour are due to the formation of new cementitious materials. The analytical investigation confirmed two major reactions when GGBS and lime were added to the pure clay soil, hydration of GGBS activated by lime to produce calcium aluminosilicate hydrate gel (C-A-S-H) and hydrotalcite type phase, and the clay-lime reaction to produce calcium silicate hydrate (C-S-H), (C-A-H) and (C-A-S-H). The NMR test results revealed that the aluminosilicate chain length (EL), the aluminium: silicate (Al/Si) ratio and the amount of Si in the formed C-S-H significantly increased with an increase in the curing temperature and period, which indicates a more stable and well crystalline C-S-H. The results indicate that the use of GGBS alone, or preferably with lime, could have a significant effect on the behaviour of potentially swelling clays. Recommendations for further studies include a study of the effect of cyclic loading on the test soil. Also, site trials should be carried out to assess the suitability of using these materials in the field.
APA, Harvard, Vancouver, ISO, and other styles
8

Rasul, Jabar. "Investigating the use of stabilized subgrade soils for road pavements in Kurdistan." Thesis, University of Birmingham, 2016. http://etheses.bham.ac.uk//id/eprint/6819/.

Full text
Abstract:
Road pavement design in Kurdistan is based on ASSHTO 1993. However, it seems not to be entirely satisfactory since it is unable to take full account of properties of local soils or those which have been stabilised. To address this, a design procedure applicable to different material and environmental conditions was developed. The associated research consisted of a suite of laboratory experiment allied to the development of a finite element model. The laboratory work was undertaken on three types of subgrade soils found in Kurdistan to determine their permanent deformation behaviour, UCS and resilient modulus for a range of moisture contents. The experimental investigation considered soils stabilised with 2%, 4% cement content and a combination of cement and lime with 2% cement plus 1.5% lime and 4% cement and 1.5% lime. The results were used to develop empirical equations to: (i) predict resilient modulus values of deteriorated modified soils as a function of different stabiliser contents and types; (ii) correlate resilient modulus values of soils with their UCS and stress state; (iii) determine the accumulation of permanent deformation in modified subgrade soils subject to weathering. These relationships, together with the developed finite element model were used to establish the design procedure.
APA, Harvard, Vancouver, ISO, and other styles
9

Kim, Dong-Gyou. "Engineering properties affecting the resilient modulus of fine-grained soils as subgrade." The Ohio State University, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=osu1298905282.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Ika, Putra Agus. "Stabilisation of expansive subgrade soils with slag and cement for road construction." Thesis, Curtin University, 2014. http://hdl.handle.net/20.500.11937/374.

Full text
Abstract:
This research evaluates stabilisation of expansive soil as a subgrade for road pavement. The recommended stabiliser proportion was 13.5% slag + 1.5% cement at 28 days curing time, which based on obtaining UCS test results that eight times magnitudes higher than the strength of the non-stabilised soil. The CBR values were more than four times higher than the minimum required for designing road pavement. The best resilient modulus correlation model was the hyperbolic correlation model.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Subgrade soils"

1

Newcomb, David E. Measuring in situ mechanical properties of pavement subgrade soils. Washington, D.C: National Academy Press, 1999.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Puppala, Anand J. Estimating stiffness of subgrade and unbound materials for pavement design. Washington, D.C: Transportation Research Board, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Puppala, Anand J. Estimating stiffness of subgrade and unbound materials for pavement design. Washington, D.C: Transportation Research Board, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Puppala, Anand J. Estimating stiffness of subgrade and unbound materials for pavement design. Washington, D.C: Transportation Research Board, 2008.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Wattanasanticharoen, Ekarin. Investigations to evaluate the performance of four selected stabilization methods on soft subgrade soils of southeast Arlington. Ann Arbor, Mich: UMI, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Quintus, H. L. Von. Design pamphlet for the determination of design subgrade in support of the 1993 AASHTO guide for the design of pavement structures. McLean, VA: U.S. Dept. of Transportation, Federal Highway Administration, Research and Development, Turner-Fairbank Highway Research Center, 1997.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
7

Zhu, Hanhua, Zhijun Wu, Mengchong Chen, and Yongli Zhao. Controlling Differential Settlement of Highway Soft Soil Subgrade. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-0722-5.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

D, Nelson John. Expansive soils: Problems and practice in foundation and pavement engineering. New York: J. Wiley, 1992.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
9

McManis, Kenneth L. Identification and stabilization methods for problematic silt soils. [Baton Rouge, La: Louisiana Transportation Research Center, 2002.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

Symposium on Resilient Modulus Testing for Pavement Components (2002 Salt Lake City, Utah). Resilient modulus testing for pavement components. Edited by Durham Gary N. 1942-, Marr W. Allen, DeGroff Willard L, ASTM International. Committee D18 on Soil and Rock., and ASTM International. Subcommittee D18.09 on Cyclic and Dynamic Properties of Soils. West Conshohocken, PA: ASTM International, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Subgrade soils"

1

Yarrapureddi, Hari Kumar Reddy, Gokhan Saygili, and Mena I. Souliman. "CBR Strength of Treated Subgrade Soils." In Sustainable Civil Infrastructures, 1–8. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-79641-9_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Abdelmawla, Ahmed, and S. Sonny Kim*. "Prediction of subgrade soil density using dielectric constant of soils." In Eleventh International Conference on the Bearing Capacity of Roads, Railways and Airfields, Volume 1, 448–57. London: CRC Press, 2021. http://dx.doi.org/10.1201/9781003222880-41.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Gonawala, Radha J., Rakesh Kumar, and Krupesh A. Chauhan. "Stabilization of Expansive Soil with Corex Slag and Lime for Road Subgrade." In Recent Advancements on Expansive Soils, 1–14. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-01914-3_1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Kudryavtcev, Sergey, Tatiana Valtceva, Zhanna Kotenko, Aleksey Kazharsrki, Vladimir Paramonov, Igor Saharov, and Natalya Sokolova. "Reinforcing a Railway Embankment on Degrading Permafrost Subgrade Soils." In International Scientific Conference Energy Management of Municipal Facilities and Sustainable Energy Technologies EMMFT 2019, 35–44. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-57450-5_4.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Sridevi, G., G. Sudarshan, and A. Shivaraj. "Performance of Geocell and Geogrid Reinforced Weak Subgrade Soils." In Lecture Notes in Civil Engineering, 273–83. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6466-0_26.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Sawangsuriya, Auckpath, Apiniti Jotisankasa, and Sekchai Anuvechsirikiat. "Classification of Shrinkage and Swelling Potential of a Subgrade Soil in Central Thailand." In Unsaturated Soils: Research and Applications, 325–31. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012. http://dx.doi.org/10.1007/978-3-642-31116-1_44.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Wakatsuki, Hiroaki, Yukihiro Kohata, Daisuke Tamayama, and Toshiyuki Mitachi. "Evaluation Method of Deformation Modulus of Subgrade Soils Considering Drainage Condition." In Lecture Notes in Civil Engineering, 761–72. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-77234-5_62.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Murana, Abdulfatai Adinoyi. "Default k-Values for Estimating Resilient Modulus of Coarse-Grained Nigerian Subgrade Soils." In Soil Testing, Soil Stability and Ground Improvement, 210–26. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-61902-6_17.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Kempfert, Hans-Georg, Alexander Gotschol, Yifeng Hu, and Tim Stöcker. "Experimental Investigation and Numerical Modelling of Soils and Ballast under Cyclic and Dynamic Loading." In System Dynamics and Long-Term Behaviour of Railway Vehicles, Track and Subgrade, 411–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45476-2_24.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Little, Dallas N. "Lime Stabilization of Subgrade Soils for Structural Purposes: Past Evidence and Future Needs." In Lime: Building on the 100-Year Legacy of The ASTM Committee C07, 35–59. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2012. http://dx.doi.org/10.1520/stp20120022.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Subgrade soils"

1

Guo, Zhong-yin, Hong-liang Zhang, Lin Cong, and Qi-ju Gao. "Permanent Deformation of Subgrade Soils." In Geo-Denver 2007. Reston, VA: American Society of Civil Engineers, 2007. http://dx.doi.org/10.1061/40924(308)13.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Sawangsuriya, A., T. B. Edil, P. J. Bosscher, and X. Wang. "Small-Strain Stiffness Behavior of Unsaturated Compacted Subgrade." In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)91.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Mabirizi, Daniel, and Rifat Bulut. "Moisture Flow in Unsaturated Subgrade Soils." In GeoHunan International Conference 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/47628(407)6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Yue, Er, Lizhou Chen, Rifat Bulut, and Qi Cheng. "Climatic Parameter TMI in Subgrade Soils." In International Symposium of Climatic Effects on Pavement and Geotechnical Infrastructure 2013. Reston, VA: American Society of Civil Engineers, 2014. http://dx.doi.org/10.1061/9780784413326.011.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Heydinger, Andrew G., and B. O. A. Davies. "Analysis of Variations of Pavement Subgrade Soil Water Content." In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)15.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Clarke, Christopher R. "Monitoring Long-Term Subgrade Moisture Changes with Electrical Resistivity Tomography." In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)16.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Kung, Johnson H. S., H. D. Lin, Shu-Jung Yang, and Wei-Hsing Huang. "Resilient Modulus and Plastic Strain of Unsaturated Cohesive Subgrade Soils." In Fourth International Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2006. http://dx.doi.org/10.1061/40802(189)41.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Ahmed, Asif, MD Sahadat Hossain, Mohammad Sadik Khan, and Aya Shishani. "Data Based Real Time Moisture Modeling in Unsaturated Expansive Subgrade." In Second Pan-American Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481707.017.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Thite, Siddharth, Hakan Sahin, and Rifat Bulut. "Estimation and Comparison of Suction Compression Index for Oklahoma Subgrade Soils." In Second Pan-American Conference on Unsaturated Soils. Reston, VA: American Society of Civil Engineers, 2018. http://dx.doi.org/10.1061/9780784481707.006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Fedorova, L. L., D. V. Savvin, M. P. Fedorov, and A. S. Struchkov. "GPR monitoring of cryogenic processes in subgrade soils." In 2016 16th International Conference on Ground Penetrating Radar (GPR). IEEE, 2016. http://dx.doi.org/10.1109/icgpr.2016.7572624.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Subgrade soils"

1

Ganju, Eshan, Shahedur Rahman, Monica Prezzi, Rodrigo Salgado, and Nayyarzia Siddiki. Moisture-Strength-Constructability Guidelines for Subgrade Foundation Soils Found in Indiana. Purdue University, March 2017. http://dx.doi.org/10.5703/1288284316354.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Luo, Xiadong, Rodrigo Salgado, and A. Altschaeffl. Cone Penetration Test to Assess the Mechanical Properties of Subgrade Soils. West Lafayette, IN: Purdue University, 1998. http://dx.doi.org/10.5703/1288284313162.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Shivakumar, Pranavkumar, Kanika Gupta, Antonio Bobet, Boonam Shin, and Peter J. Becker. Estimating Strength from Stiffness for Chemically Treated Soils. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317383.

Full text
Abstract:
The central theme of this study is to identify strength-stiffness correlations for chemically treated subgrade soils in Indiana. This was done by conducting Unconfined Compression (UC) Tests and Resilient Modulus Tests for soils collected at three different sites—US-31, SR-37, and I-65. At each site, soil samples were obtained from 11 locations at 30 ft spacing. The soils were treated in the laboratory with cement, using the same proportions used for construction, and cured for 7 and 28 days before testing. Results from the UC tests were compared with the resilient modulus results that were available. No direct correlation was found between resilient modulus and UCS parameters for the soils investigated in this study. A brief statistical analysis of the results was conducted, and a simple linear regression model involving the soil characteristics (plasticity index, optimum moisture content and maximum dry density) along with UCS and resilient modulus parameters was proposed.
APA, Harvard, Vancouver, ISO, and other styles
4

Gupta, Kanika, Sung Soo Park, Antonio Bobet, and Tommy Nantung. Improved Reliability of FWD Test Results and Correlations with Resilient Modulus. Purdue University, 2022. http://dx.doi.org/10.5703/1288284317370.

Full text
Abstract:
Resilient modulus (MR) is a key factor in the Mechanistic Empirical Pavement Design Guide (MEPDG) which was adopted by INDOT in January 2009. The resilient modulus can be determined in new pavement projects from subgrade soil samples collected at the site. However, for a pavement rehabilitation project, it becomes difficult to obtain soil information, and coring for samples may not be feasible because of traffic. The literature is rich with correlations between the MR of the subgrade obtained in the laboratory with that estimated from FWD tests in the field. However, the review conducted shows very contradictory and inconsistent findings, thus existing correlations seem to apply only to the cases investigated, i.e., they are ad hoc correlations and cannot be generalized. To improve the interpretation of the FWD data and enhance the reliability of the results in Indiana, FWD and GPR tests were performed at five different road construction projects at the same locations where soil samples were collected and tested in the laboratory for resilient modulus. The selected sites included roads with rigid pavement and treated subgrade and flexible pavement with untreated subgrade. The study showed that (1) FWD backcalculation is greatly affected by pavement thickness; (2) GPR can provide actual thicknesses and can identify discrepancies between as-built and design pavement thickness; (3) for flexible pavements, a one-to-one correlation exists between FWD modulus and laboratory resilient modulus values for untreated subgrade soils; (4) MODTAG or ELMOD codes can both be used to estimate the resilient modulus of the subgrade in flexible pavements; (5) for rigid pavements, results of FWD backcalculation analysis using ELMOD or MODTAG greatly overestimate the resilient modulus of the soil, with backcalculated moduli 1.3 to 6 times higher than laboratory results; (6) ELMOD is recommended for routine analysis of FWD data, while MODTAG is recommended for research or to evaluate the quality of the data, when needed.
APA, Harvard, Vancouver, ISO, and other styles
5

Christoforidou, Eirini, Antonio Bobet, Tommy Nantung, and Philippe L. Bourdeau. Use of Geosynthetics on Subgrade and on Low and Variable Fill Foundations. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317437.

Full text
Abstract:
There are significant problems during construction to establish an adequate foundation for fills and/or subgrade for pavements when the natural ground has low-bearing soils. Geosynthetics such as geogrids, geotextiles, and/or geocells could provide a less time-consuming, costly alternative for establishing an adequate foundation for the fill and/or subgrade. There is extensive evidence in the literature and on DOTs practices about the suitability of using geotextiles in pavements as separators. Previous studies have also shown that the use of geogrids in flexible pavements as a reinforcing mechanism could decrease the thickness of the base layer and/or increase the life of the pavement. In this study, analyses of selected pavement designs using Pavement ME—while considering geogrid-enhanced base or subgrade resilient modulus values—showed that geogrid-reinforcement, when placed at the interface between subgrade and base, did not produce significant benefits and only a modest increase in pavement life was predicted. In addition, parametric finite element analyses were carried out to investigate the potential benefits of placing a geogrid at the base of a fill over a localized weak foundation zone. The analyses showed that the use of geogrids is beneficial only when: (a) the stiffness of the weak foundation soil is about an order of magnitude smaller than the rest of the foundation soil; and (b) the horizontal extent of the weak foundation soil is at least 30% of the base of the embankment foundation. The largest decrease in differential settlements at the surface of the fill, resulting from geogrid-reinforcement, was less than 20% and, therefore, it is unlikely that the sole use of geogrids would be sufficient to mitigate differential settlements. Based on previous studies, a geocell mattress, which is a three-dimensional geosynthetic filled with different types of materials, could act as a stiff platform at the base of an embankment and bridge over weak zones in the foundation. However, given the limited experience in Indiana on the use of geocells, further research is required to demonstrate that geocells can be effectively used in place of other reinforcement methods.
APA, Harvard, Vancouver, ISO, and other styles
6

Behnood, Ali, and Jan Olek. Development of Subgrade Stabilization and Slab Undersealing Solutions for PCC Pavements Restoration and Repairs. Purdue University, 2020. http://dx.doi.org/10.5703/1288284317128.

Full text
Abstract:
The loss of functionality and the development of distress in concrete pavements is often attributable to the poor subbase and subgrade conditions and/or loss of support due to the development of the voids underneath the slab. Subgrade soil stabilization can be used as an effective approach to restore the functionality of the subgrades in patching projects. This research had two main objectives: (1) identifying the best practices for soil stabilization of the existing subgrade during pavement patching operations and (2) identifying and developing new, modified grouting materials for slab stabilization and undersealing. Various stabilization scenarios were tested and showed improved performance of the subgrade layer. The use of geotextile along with aggregate course was found to significantly reduce the settlement. Non-removable flowable fill was also found to significantly reduce the subgrade settlement. Cement-treated aggregate and lean concrete provided the best performance, as they prevented formation of any noticeable settlement in the underlying subgrade.
APA, Harvard, Vancouver, ISO, and other styles
7

Becker, Peter J. Using the Light Weight Deflectometer for Performance-Based Quality Assurance Testing of Cement Modified Subgrades. Purdue University, 2021. http://dx.doi.org/10.5703/1288284317304.

Full text
Abstract:
This report documents the findings from SPR-4230 (Alternative Quality Assurance Methods for Compacted Subgrade). The main objective of SPR-4230 involved establishing performance-related quality assurance (QA) test methods for pavement subgrade construction. Because INDOT generally prefers specifying subgrade treatment type IBC (i.e., 14-in. cement modified subgrade), this study focused on performance-based QA test methods for constructing cement modified subgrade. Moreover, INDOT prefers using light weight deflectometer (LWD) for chemically modified subgrade construction acceptance, so this study aimed to use LWD deflection measurements as performance-related construction acceptance criteria. A laboratory study was performed to relate LWD deflections with resilient modulus that is the key subgrade performance-related parameter in pavement design. In addition, LWD deflections were related with unconfined compressive strength increase that is the key parameter in chemical soil modification mix design. A rigorous field study consisting of LWD testing and falling weight deflectometer (FWD) testing at INDOT new pavement construction sites was conducted to verify the laboratory developed relationship. Recommendations for implementing results of this study into cement modified subgrade construction acceptance is provided, as are recommendations for future research.
APA, Harvard, Vancouver, ISO, and other styles
8

Dunston, Phillip S., Antonio Bobet, and Timothy B. McClure. Proof Rolling of Foundation Soil and Prepared Subgrade During Construction. Purdue University, February 2018. http://dx.doi.org/10.5703/1288284316571.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Yildirim, Irem, Monica Prezzi, Meera Vasudevan, and Helen Santoso. Use of Soil-Steel Slag-Class-C Fly Ash Mixtures in Subgrade Applications. Purdue University, October 2013. http://dx.doi.org/10.5703/1288284315188.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

El Howayek, Alain, Daniel Muschett, Tommy Nantung, Jusang Lee, Marika Santagata, and Antonio Bobet. Verification of the Enhanced Integrated Climatic Module Soil Subgrade Input Parameters in the MEPDG. Purdue University, November 2016. http://dx.doi.org/10.5703/1288284316331.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Subgrade soils' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography