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Journal ArticleDOI

Tensile Strength of Cement Treated Clay

01 Apr 2021-Vol. 727, Iss: 1, pp 012005
TL;DR: In this paper, the determination of tensile strength of cement treated clay, using a newly developed tensile testing apparatus, is focussed in this study, and the existence of an optimum cement content for tensile properties is also discussed.
Abstract: Tensile properties of geomaterials often play an important role in many geotechnical engineering problems. Compacted soil layers in dams, clay liners in landfills, reinforced earth-retaining wall systems, cement stabilized crushed rocks in pavements, etc. are constantly checked for tensile cracking. This type of cracking happens when the developed tensile stress exceeds the tensile strength of the material. Usually, the tensile strength of natural soil is assumed to be negligible. However, it is proven that cement treated soils possess some amount of tensile strength. The determination of tensile strength of cement treated clay, using a newly developed tensile testing apparatus, is focussed in this study. The existence of an optimum cement content for tensile strength is also discussed.

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References
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Journal ArticleDOI
TL;DR: In this paper, the strength development in cement-stabilized silty clay is analyzed based on microstructural considerations, which includes water content, curing time, and cement content.

447 citations

Journal ArticleDOI
TL;DR: In this paper, after-curing void ratio (eot) and cement content (Aw) have been found sufficient to characterize the strength and compressibility of cement-admixed clay at high water contents from analyses performed on the results of unconfined compression tests.
Abstract: The fundamental parameters such as after-curing void ratio (eot) and cement content (Aw) have been found sufficient to characterize the strength and compressibility of cement-admixed clay at high water contents From analyses performed on the results of unconfined compression tests, the ratio eot/Aw has been proven to combine together the influences of clay water content, cement content, and curing time on the strength of cement-admixed clay Moreover, the results of oedometer consolidation tests revealed that while Aw governs the position of the postyield compression line, the magnitude of eot determines the magnitude of the one-dimensional vertical yield stress σvy′ at particular Aw The value of eot reflects, primarily, the clay water content and, secondarily, the cement content and the curing time Normalizing the after-curing unit weight, after-curing water content, and after-curing specific gravity were incorporated in an empirical relationship of eot

338 citations

Journal ArticleDOI
TL;DR: In this article, the influence of three main constituents of the mixture, namely clay, water, and cement, on the strength development of Singapore marine clays improved by cement mixing is investigated.
Abstract: Stabilization of soft ground by the deep cement mixing (DCM) method has become an increasingly popular method to improve stability in an excavation in soft clay and to limit movement in adjacent sub-structures. The desired increase in strength and stiffness to fulfil the intended functions can be achieved provided that the right mix proportion is adopted. To proceed with this kind of soil improvement, prediction of the strength and stiffness of the improved soil is necessary. Due to a short history of the DCM method in Singapore, there is limited data on the improved properties of local clays. This study is conducted to bridge that gap and also extends its usefulness to clays elsewhere. In the paper, the influences of three main constituents of the mixture, namely clay, water, and cement on the strength development of Singapore marine clays improved by cement mixing are investigated. Based on the experimental results, it is shown that a convenient normalization can produce a consistent pattern for evaluation of improved strength of clays from different parts of Singapore. This normalization is also shown to work for one Japanese clay. Correlations between strength and stiffness of the improved clay are also obtained. Lastly, it is shown that for a cement mixed clay there is a continual increase in strength and stiffness with time. This will help to reduce ground movement, and it will also increase the bending moment in the retaining wall. Both aspects must be considered in a design.

111 citations

Journal ArticleDOI
TL;DR: In this article, a simple elasto-plastic model that simulates the behavior of cement-treated sands under a general three-dimensional stress state was used for these analyses and the analytical results showed that the direct tension tests yield reliable values of the actual tensile strength that will be mobilized under an ideal condition of uniaxial tension.

40 citations

Journal ArticleDOI
TL;DR: In this paper, the authors evaluate the safety of embankment dams by estimating the erosion rate based on common geotechnical properties such as shear and tensile strength.
Abstract: To evaluate the safety of embankment dams, it is necessary to estimate the erosion rate based on common geotechnical properties such as shear and tensile strength. However, the empirical expression...

37 citations