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Evaluating The Performance Of Soil Cement And Cement Modified Soil
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Book Synopsis Evaluating the Performance of Soil-Cement and Cement-Modified Soil by : Portland Cement Association
Download or read book Evaluating the Performance of Soil-Cement and Cement-Modified Soil written by Portland Cement Association and published by . This book was released on 2004-05-01 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the findings on an extensive laboratory testing study to identify new approaches to improving the performance of soil-cement bases and cement-modified soils in pavements. Current soil-cement design procedures are based solely on 7-day Unconfined Compressive Strength (UCS) criteria, but high base strengths are no guarantee of satisfactory long-term pavement performance. In this project a laboratory study was undertaken to determine the optimal cement content for three marginal Texas base materials. Recommended cement contents are based on balancing conflicting criteria from the following four performance related tests: a) UCS, b) Shrinkage, c) Moisture susceptibility, and d) Abrasion resistance. A new test method called the Tube Suction Test (TST) is introduced for assessing the moisture susceptibility of soil-cement materials. The TST is shown to correlate well with the existing wet-dry and freeze-thaw durability tests. In addition, the effects of both the level of pulverization and the method of adding the stabilizer (dry vs. slurry) were studied. The major finding was that the properties of the CMS were strongly dependent upon the mixing procedure. The use of cement slurries produced the best lab properties. The results showed that the slurry was effective in treating soil even with slurry mixing times up to 4 hours.
Book Synopsis Guide to Cement-modified Soil (CMS) by : Gregory E. Halsted
Download or read book Guide to Cement-modified Soil (CMS) written by Gregory E. Halsted and published by . This book was released on 2008-08 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cement-modified soil (CMS) is a soil/aggregate material that has been treated with a relatively small proportion of portland cement in order to amend its undesirable properties so that they are suitable for use in subgrade or foundation construction. This guide to CMS discusses its applications, benefits, design, construction, testing, and performance.
Book Synopsis A Rapid Method for Soil Cement Design, Louisiana Slope Value Method, Part II by : Charles M. Higgins
Download or read book A Rapid Method for Soil Cement Design, Louisiana Slope Value Method, Part II written by Charles M. Higgins and published by . This book was released on 1966 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluation of Cement-modified Soil (CMS) with Microcracking by : George A. Tannoury
Download or read book Evaluation of Cement-modified Soil (CMS) with Microcracking written by George A. Tannoury and published by . This book was released on 2020 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cement modification of subgrade has been widely practiced for the past few decades. Recently, cement has become a more economical binder to modify in-situ subgrade soil since other binders, such as fly ash, have become less available and therefore their prices have increased significantly. In addition, a much higher percentage of fly ash needs be used, when compared with cement to achieve the same subgrade strength and stiffness. In general, cement-modified subgrade is prone to develop shrinkage cracking, which can eventually reflect through asphalt pavement layers to the surface after construction. For some subgrade soils, a high cement content is needed to meet the unconfined compressive strength requirement without jeopardizing durability. A higher cement content will result in higher shrinkage cracking potential. To overcome this problem, a microcracking technology has been developed and adopted in the field. This technology involves re-compaction of cement-modified soil (CMS) with a roller, 24 to 48 hours after initial compaction, to induce microcracks in the CMS and minimize the potential for large shrinkage cracks. Microcracking of CMS is not expected to significantly reduce the strength and stiffness of CMS, but it is expected to increase its hydraulic conductivity and reduce the potential for large shrinkage cracks. Unfortunately, the procedure to simulate microcracking of CMS in the laboratory and to evaluate its effect on properties of CMS has not been established yet. This report documents the development of such a procedure and discusses the effect of microcracking on the properties (strength and modulus) of CMS specimens. The developed procedure utilized unconfined compression (UC) tests to generate microcracks in specimens. To generate microcracks, the loading stress level was found to be equal to the unconfined compressive strength of the CMS specimen. The laboratory results showed that microcracking increased the hydraulic conductivity of the specimen and reduced its electrical resistivity when the specimen was saturated. The Light Weight Deflectometer (LWD) tests conducted in the field showed that adding cement increased the subgrade modulus. However, after applying three passes of roller compaction to generate the microcracks in the CMS in the field, the subgrade modulus dropped to approximately 40% of its original value on average.
Book Synopsis Behavior of Stabilized Soils Under Repeated Loading by : James Kenneth Mitchell
Download or read book Behavior of Stabilized Soils Under Repeated Loading written by James Kenneth Mitchell and published by . This book was released on 1972 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Influence of Curing Temperature on Cement Stabilization of North Carolina Soils by : Nicholas James DeBlasis
Download or read book The Influence of Curing Temperature on Cement Stabilization of North Carolina Soils written by Nicholas James DeBlasis and published by . This book was released on 2008 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cement is perhaps the most common soil stabilizer, often blended with soils at various proportions to increase strength and durability. However, there are concerns with regard to the impact of low curing temperature on strength and ultimate performance. The purpose of this study is to determine the impact curing temperature has on the unconfined compressive (UC) strength and stress-strain behavior of cement modified soil as well as to consider methods to improve performance in cold-weather conditions. The data indicate that curing soil-cement at lower temperatures will result in lower strengths. For example, the 7 day strength for samples cured at 25[degrees]F was less than the strength of samples cured at 50[degrees]F or 70[degrees]F by a factor ranging from 2-6. Likewise, the 7 day strength for samples cured at 35[degrees]F was less than the strength of samples cured at 50[degrees]F or 70[degrees]F by approximately 20-25%. Additionally, on the basis of 15 repeat tests for 3 & 7 day curing periods, for three different soils, results indicate that the mean strength at 3 days is 84-93% of that for 7 days, in support of a potential change in current subgrade evaluation practice predicated on the longer duration. The use of a calcium chloride (CaCl[subscript]2) solution as the molding moisture content was found to increase the UC strength by 20% for one soil/temperature condition but generally resulted in decreased strength at the concentration range (0.5 - 3.0%) tested. The use of CaCl[subscript]2 solution had a mixed impact on the maximum dry density (MDD), with overall changes between 2-3% of the MDD of the unmodified soil-cement control. Similarly, the optimum moisture contents (OMC) were generally within [plus or minus]2% of the OMC of the control. Analysis of the data suggests a threshold concentration for CaCl[subsript]2 efficacy, beyond which diminishing benefit transitions to deleterious performance.
Book Synopsis Mechanical Performance of Fine-grained Soil Cement Mixtures by : Ammar Ali
Download or read book Mechanical Performance of Fine-grained Soil Cement Mixtures written by Ammar Ali and published by . This book was released on 2018 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are various methods that can be utilized for improving the mechanical properties of soils. Ground improvement alternatives include mechanical, chemical, and biochemical methods. Among the chemical ground improvement methods, cement stabilization is one of the most commonly used. The addition of cement in the presence of water triggers a series of chemical reactions that result in an improvement in strength and stiffness and a reduction in the plasticity of the soil. Cement stabilization can also be completd in-situ, which makes it cost effective. Cement is most commonly used with coarse-grained soils, i.e., concrete and cemented bases, whereas this thesis aims to explore its use--in low percentages (3 to 6% by mass)--with low and high plasticity fine-grained soils. The small-strain constrained modulus (M_max) was used to evaluate the stiffness, and the unconfined compressive strength (UCS) was used to evaluate the large-strain behavior. The results indicated that the stiffness and strength of soil-cement mixtures at low cement contents is very sensitive to changes in compaction water content, compactive effort, and curing conditions.
Book Synopsis Soil-cement Construction Handbook by : Portland Cement Association
Download or read book Soil-cement Construction Handbook written by Portland Cement Association and published by . This book was released on 1995 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guide to Cement-treated Base (CTB) by : Gregory E. Halsted
Download or read book Guide to Cement-treated Base (CTB) written by Gregory E. Halsted and published by . This book was released on 2006 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cement-treated base (CTB) is a general term that applies to an mixture of native soils and/or manufactured aggregates with measured amounts of portland cement and water that is compacted and cured to form a strong, durable, frost resistant paving material. Other descriptions such as soil-cement base, cement-treated aggregate base, cement-stabilized base are sometimes used. This document provides a basic guide on the use of cement-treated base (CTB) for pavement applications. This document provides on overview on the design and construction of CTB for both mixed-in-place and central plant mixed operations. A suggested construction specification is also included.
Book Synopsis Performance of Cement Modified Soils by : John D. Roberts
Download or read book Performance of Cement Modified Soils written by John D. Roberts and published by . This book was released on 1984* with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis EVALUATION OF CEMENT-TREATED SOILS SUBJECTED TO CYCLES OF FREEZING AND THAWING. by : Reza Jolous Jamshidi
Download or read book EVALUATION OF CEMENT-TREATED SOILS SUBJECTED TO CYCLES OF FREEZING AND THAWING. written by Reza Jolous Jamshidi and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Deep Mixing Method by : Masaki Kitazume
Download or read book The Deep Mixing Method written by Masaki Kitazume and published by CRC Press. This book was released on 2013-02-21 with total page 436 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Deep Mixing Method (DMM), a deep in-situ soil stabilization technique using cement and/or lime as a stabilizing agent, was developed in Japan and in the Nordic countries independently in the 1970s. Numerous research efforts have been made in these areas investigating properties of treated soil, behavior of DMM improved ground under static and d
Book Synopsis Laboratory and Field Evaluation of Soil Stabilization Using Cement Kiln Dust by :
Download or read book Laboratory and Field Evaluation of Soil Stabilization Using Cement Kiln Dust written by and published by . This book was released on 2003 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: A field and laboratory study was undertaken to evaluate Cement Kiln Dust (CKD) as a soil stabilizer. The performance of CKD from three different sources, Holnam of Ada, Blue Circle Cement of Tulsa, and Lone Star Industries, Inc. of Pryor was compared to to the performance of Quick Lime. The field component involved the construction of four test sections along a rural highway near Lula, Oklahoma.
Download or read book Lime Stabilization written by and published by Transportation Research Board National Research. This book was released on 1987 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: For many years, various forms of lime, including products with varying degrees of purity, have been utilized successfully as soil stablizing agents. The state of the art in lime treatment based on a comprehensive analysis of current practice and technical literature is presented in this report. References are included for more information.
Book Synopsis Behavior of Stabilized Soils Under Repeated Loading. Report 5. Performance Evaluation of Cement-Stabilized Soil Layers and Its Relationship to Pavement Design by :
Download or read book Behavior of Stabilized Soils Under Repeated Loading. Report 5. Performance Evaluation of Cement-Stabilized Soil Layers and Its Relationship to Pavement Design written by and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Properties of cement-stabilized soils were interrelated, and the performance of field sections previously tested (1963-1964) at the Waterways Experiment Station (WES), Vicksburg, Mississippi, was evaluated for the purposes of determining the validity of existing theory for prediction of pavement behavior and developing criteria and procedure for designing pavements containing soil layers stabilized with small amounts of cement. Field test sections of three different thicknesses were constructed of Vicksburg silty clay stabilized with 3%, 6%, and 10% cement contents on a heavy clay subgrade prepared to CBR values of 4 and 10, and tested under 10,000, 25,000, and 50,000-pound single-wheel loads. A failure criterion was defined according to rut depth, and the equivalency of different wheel loads (in terms of damage caused to the pavement) was determined. (Author).
Book Synopsis Advances in Characterization and Analysis of Expansive Soils and Rocks by : Laureano R. Hoyos
Download or read book Advances in Characterization and Analysis of Expansive Soils and Rocks written by Laureano R. Hoyos and published by Springer. This book was released on 2017-07-11 with total page 231 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume includes a collection of technical papers covering two important research topics in geotechnical engineering: (1) the behavior and treatment of expansive soils, and (2) the characterization of rock properties. The twelve studies on expansive soils include investigations into novel stabilization techniques for expansive soils using different admixtures or mechanical consolidation techniques, as well as new experimental approaches to evaluate the behavior of expansive soils. They also include an evaluation of wetting boundary conditions on the volume change of expansive soils, as well as the role of hydrologic boundary conditions in arid climates. The four studies on rock properties include thermo-hydro-mechanical behavior of gypsum rock, role of rock strength in blastability, indirect methods to estimate rock strength, and variations in isotope distributions in Permian rocks. The two broad themes in this collection, as summarized above, are representative of local challenges facing geotechnical engineers in the Middle East, but their contributions can also be extended to other regions of the world. This volume is part of the proceedings of the 1st GeoMEast International Congress and Exhibition on Sustainable Civil Infrastructures, Egypt 2017.
Book Synopsis Soil Stabilization with Portland Cement by : National Research Council (U.S.). Highway Research Board
Download or read book Soil Stabilization with Portland Cement written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1961 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report surveys the available information on mixtures of soil and cement. Included are data on (1) properties of cement-treated soil, (2) factors influencing properties of cement-treated soil, (3) uses of cement-treated soil and bituminous surfacing requirements, (4) preliminary surveying, sampling, testing and mix design for cement- treated soil construction, (5) structural design of soil- cement bases, (6) cement-treated soil construction, (7) engineering control of construction, and (8) field performance of soil-cement base courses.
