Pore Fluid Properties and Compressibility of Kaolinite

Chen, J.; Anandarajah, A.; Inyang, Hilary I.

doi:10.1061/(asce)1090-0241(2000)126:9(798)

Cited by 118 publications

(49 citation statements)

References 23 publications

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“…Another feature is the access of liquids and substances to the interlayer spaces in clay during crystalline swelling. This theory often is used as the basis for phenomenological and quantitative interpretations [4][5][6][7]. Thus, soil stabilization substances should be able to inhibit clay swelling and shrinkage by reducing the expansion and shrinkage of the interlayer space through bonding the clay particles together on their external surfaces.…”

Section: Introductionmentioning

confidence: 99%

Effect of Polyvinyl Acetate Stabilization on the Swelling-Shrinkage Properties of Expansive Soil

Liu

Wang

Long

et al. 2017

International Journal of Polymer Science

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Polyvinyl acetate constitutes a class of polymers that can entirely dissolve in water to form a solution. In this study, polyvinyl acetate as a nontraditional chemical stabilizer was used in soil improvement. Laboratory tests were carried out to evaluate the effect of polyvinyl acetate on swelling-shrinkage properties of expansive soil. A series of shrink/swell tests were performed with adding polyvinyl acetate as amendment at a concentration 3 g/cm 3 to four aggregate sizes in the range of 0-0.5 mm, 0.5-1 mm, 1-2 mm, and 2-5 mm and five concentrations 1.5 g/cm 3 , 3 g/cm 3 , 4.5 g/cm 3 , 6 g/cm 3 , and 9 g/cm 3 to soils with aggregate size in the range of 0.5-1 mm for comparison of results with those of untreated soils. The results show that all the linear swelling ratio (LSWR) and linear shrinkage ratio (LSHR) values of the treated specimens decrease. SEM images and the test results indicate the achieved reduction in volume change of the soil tested using soil pore filling and particle encapsulation.

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Section: Introductionmentioning

confidence: 99%

Effect of Polyvinyl Acetate Stabilization on the Swelling-Shrinkage Properties of Expansive Soil

Liu

Wang

Long

et al. 2017

International Journal of Polymer Science

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“…As it is nonexpanding, it is ideal as a fine aggregate in slurry bentonite walls that are susceptible to expansion cracking under changing climatic conditions (Rumer and Ryan, 1995) and its low swelling potential and low susceptibility to desiccation also make it an ideal surface liner material. Compared to the more expansive clays such as bentonite and illite, kaolinite may be less controlled by physiochemical factors and more controlled by mechanical forces, resulting partly from kaolinite's larger particle size and more irregular particle arrangement (Chen et al, 2000). Large overburden pressures also improve kaolinite's resistance to chemical damage (Chen et al, 2000), although base liner materials are usually more highly retentive clays such as montmorillonite.…”

Section: Introductionmentioning

confidence: 99%

“…Compared to the more expansive clays such as bentonite and illite, kaolinite may be less controlled by physiochemical factors and more controlled by mechanical forces, resulting partly from kaolinite's larger particle size and more irregular particle arrangement (Chen et al, 2000). Large overburden pressures also improve kaolinite's resistance to chemical damage (Chen et al, 2000), although base liner materials are usually more highly retentive clays such as montmorillonite.…”

Section: Introductionmentioning

confidence: 99%

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Aspects of kaolinite characterization and retention of Pb and Cd

Coles¹,

Yong²

2002

Applied Clay Science

128

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This study illustrates the complimentary nature of selected techniques for characterizing kaolinite. For the particular type of kaolinte studied, scanning electron micrographs revealed the presence of crystallites and mostly larger than clay-sized particles. These findings were in agreement with the low cation exchange capacity, low specific surface area, low zero point of charge and high purity that were determined for the kaolinite. Batch equilibrium tests were conducted on kaolinite suspensions that had been adjusted to pH 4 and pH 6. These suspensions were spiked with varying concentrations of Pb (as PbCl 2 ) and Cd (as CdCl 2 ). At equilibrium, the metal uptake was greater for the pH 6 suspensions than for the pH 4 suspensions, the metal uptake was generally greater when greater concentrations of metal had been used to spike the suspensions, and there was a reduction in suspension pH that accompanied the metal uptake. A comparison of the equilibrium curves of both metal retention and suspension pH, as a function of the initial metal concentration, combined with an analysis of metal speciation, provided evidence for the adsorption of both divalent (Pb 2 + and Cd 2 + ) and monovalent (PbCl + and CdCl + ) species by the kaolinite. Cation exchange was a primary retention mechanism and the order of selectivity for the pH 4 and pH 6 suspensions of kaolinite appeared to be Pb 2 + > H + >Cd 2 + . At higher pH and higher metal concentrations, there was an increase in Cd uptake relative to Pb uptake. This may have been a result of less competition between H + ions and metal ions for adsorption sites, and because CdCl + forms at a lower salt concentration than PbCl + , and so a greater proportion of monovalent Cd was adsorbed. D

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“…However, the volume changes in these soils due to change in chemical environment may become important. It is known that the non-swelling soils can exhibit higher swelling in ‰uids with low dielectric constant such as carbon tetra chloride (Sridharan and Rao, 1973;Chen et al, 2000). Rao and Rao (1994), Sinha et al (2003), and Sivapullaiah et al (2004) have reported the swelling of kaolinite rich red soil due to interaction with caustic soda.…”

Section: Introductionmentioning

confidence: 99%