Analysis of Swelling and Shrinkage Behavior of Compacted Clays

Mishra, Anil Kumar; Dhawan, Sarita; Rao, Sudhakar M.

doi:10.1007/s10706-007-9165-0

Cited by 76 publications

(43 citation statements)

References 5 publications

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“…(2) At drying in the water content range of the zero shrinkage ( Fig.2, curve v(ζ)) v(ζ)=v z , 0≤ζ≤ζ z (2) where ζ=ζ z is the shrinkage limit; v z ≡v(ζ z ) is the relative volume of the oven-dried clay matrix. (3) The boundary values of the relative coordinates, ζ z and ζ n as well as v z and v n (Fig.2, curve v(ζ)) for any clay satisfy the physical conditions ζ n -ζ z <<1 , v n -v z <<1 .…”

Section: The Swelling Curve Of a Pure Disaggregated Clay 21 The Majmentioning

confidence: 94%

“…In addition, a key phenomenon such as the experimentally observed decrease of the maximum swelling volume of an aggregated soil after a shrink-swell cycle in the maximum possible water content range (see e.g., [1]), requires a physical quantitative explanation. It is noteworthy that works devoted to soil swelling usually give the data on swelling volume as a function of wetting time (e.g., [2,3]). We could find only one work [1] with experimental data on the swelling curve as the dependence of the void ratio on the moisture ratio like the usual presentation of a shrinkage curve.…”

Section: Introductionmentioning

confidence: 99%

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Physical modeling of the soil swelling curve vs. the shrinkage curve

Chertkov

2012

Advances in Water Resources

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Abstract. Physical understanding of the links between soil swelling, texture, structure, cracking, and sample size is of great interest for the physical understanding of many processes in the soil-air-water system and for applications in civil, agricultural, and environmental engineering. The background of this work is an available chain of interconnected physical shrinkage curve models for clay, intraaggregate matrix, aggregated soil without cracks, and soil with cracks. The objective of the work is to generalize these models to the case of swelling, and to construct the physical-swelling-model chain with a step-by-step transition from clay to aggregated soil with cracks. The generalization is based on thorough accounting for the analogies and differences between shrinkage and swelling and the corresponding use, modification, or replacement of the soil shrinkage features. Two specific soil swelling features to be used are: (i) air entrapping in pores of the contributing clay; and (ii) aggregate destruction with the formation of new aggregate surfaces. The input for the prediction of the swelling curve of an aggregated soil coincides with that of the available model of the shrinkage curve. The analysis of available data on the maximum shrink-swell cycle of two soils with different texture and structure, accounting for sample size is conducted as applied to swelling curves and to the residual crack volume and maximum-swelling-volume decrease after the shrink-swell cycle. Results of the analysis show evidence in favor of the swelling model chain.

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Section: The Swelling Curve Of a Pure Disaggregated Clay 21 The Majmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Physical modeling of the soil swelling curve vs. the shrinkage curve

Chertkov

2012

Advances in Water Resources

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“…As a consequence of particles coming in contact, the decrease in volume of the soil becomes less than the volume of lost water. The magnitude of structural, primary, and residual shrinkage strains, i.e., ε ssh , ε psh , and ε rsh , can be obtained by the following relationships (Mishra, Dhawan, and Rao 2008;Thyagaraj, Thomas, and Das 2017): where, as outlined in Fig. 4c, e ssw = void ratio at the swollen state A (i.e., the end of secondary swelling); e ssh = void ratio at the end of structural shrinkage; e psh = void ratio at the end of primary shrinkage (or at the shrinkage limit); and e rsh = void ratio at the fully desiccated state B 2 .…”

Section: Effect Of Rubbers On the Shrinkage Potentialmentioning

confidence: 99%

Swell–Shrink–Consolidation Behavior of Rubber–Reinforced Expansive Soils

Soltani

Deng

Taheri

et al. 2018

Geotechnical Testing Journal

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This study examines the effects of two types of recycled tire rubber of fine and coarse categories on the swell-shrink-consolidation behavior of a highly expansive soil mixture. Each of the two rubber choices were incorporated into the soil at four different content levels (i.e., rubber to dry soil mass ratio) of 5, 10, 20, and 30 %. The experimental program consisted of consistency limits, compaction, swellconsolidation, swell-shrink, and unconfined compression tests. Improvement in the swell-shrink-consolidation capacity was in favor of higher rubber contents; however, when excessively included, it raised strength concerns. The swellshrink-consolidation properties were also rubber size-dependent, meaning that the rubber of coarser sizes often outperformed finer rubber. In terms of strength, however, the two rubber types promoted similar results with marginal differences. The results of the unconfined compression tests were cross checked with the swell-shrink-consolidation properties to arrive at the optimum stabilization scenarios. A maximum rubber inclusion of 10 %, preferably the rubber of coarser category, proved to satisfy the stabilization objectives (i.e., decrease in the swell-shrink-consolidation capacity as well as maintain or improve the strength) and thus was deemed as the optimum choice. Where context changes and the strength and stiffness are not a primary concern, higher rubber inclusions of up to 20 % may also be considered acceptable.

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“…Due to the importance of the subject of swelling soils, many researchers have studied expansivity of soils using direct and indirect methods (e.g. [18][19][20][21][22][23][24]).…”

Section: Introductionmentioning

confidence: 99%

Assessing Dispersivity and Expansivity of Clay Soils in the South-East of Yazd with Aim of Investigating Correlation between Them

Zare-Junaghani

Mehrnahad

Torabi-Kaveh

2019

Period. Polytech. Civil Eng.

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Having knowledge about physical, chemical and mechanical properties of problematic soils is necessary when they are applied in construction projects as borrow materials or foundation, because these soils have potential to create large financial losses. This research deals with characterizing dispersive and swelling soils as problematic soils in southeast of Yazd (center of Iran) with aim of establishing a relationship between dispersivity and expansivity indices. In this regard, after performing a series of physical and chemical tests, the characteristics of the soil samples were determined, and their dispersivity degrees were specified by conducting chemical, pinhole and double hydrometer tests. Also, swelling rates of the soils were estimated using direct method (modified free swell index, MFSI) and indirect methods (different criteria developed for swelling assessment). The results showed that chemical parameters overestimate dispersivity of the soil samples (dispersive to semi-dispersive) in compared to pinhole and double hydrometer tests (slightly non-dispersive to moderately dispersive). Different expansivity degrees were defined using the direct and the indirect methods (ignorable to very high) for the soil samples. Among the empirical criteria used to evaluate the swelling potential, the AASHTO's criterion has the closest results to the MFSI in the both boreholes. Also, it revealed that as depth increases, the degree of soil dispersivity and expansivity decrease in response to the reduction of fine grain content in the samples. Finally, the correlations between dispersivity and expansivity indices, showed that sodium absorption ratio (SAR) can be used as a reasonable index to estimate soil swelling potential.

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Analysis of Swelling and Shrinkage Behavior of Compacted Clays

Cited by 76 publications

References 5 publications

Physical modeling of the soil swelling curve vs. the shrinkage curve

Physical modeling of the soil swelling curve vs. the shrinkage curve

Swell–Shrink–Consolidation Behavior of Rubber–Reinforced Expansive Soils

Assessing Dispersivity and Expansivity of Clay Soils in the South-East of Yazd with Aim of Investigating Correlation between Them

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