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Influence of Pore Fluid Composition on Volume of Sediments in Kaolinite Suspensions

Published online by Cambridge University Press:  28 February 2024

J. Chen  and
A. Anandarajah
J. Chen
Affiliation:
Department of Civil & Environmental Engineering, West Virginia University, Morgantown, West Virginia 26506
A. Anandarajah
Affiliation:
Department of Civil Engineering, The Johns Hopkins University, Baltimore, Maryland 21218-2686
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Abstract

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Reported in this paper is a study of the influence of pore fluid composition on sediment volume of kaolinite suspensions. Laboratory tests have been conducted with kaolinite in water with NaCl, CaCl2 and A1C13 of different concentrations and in 10 types of organic liquids of varying values of static dielectric constant. The types of tests performed include regular suspension tests and leaching and cyclic leaching tests on kaolinite sediments. In the leaching tests, sediments formed during the regular suspension tests in water of low salt concentration were subsequently leached with water of high salt concentration. In the cyclic leaching tests, the salt concentration was increased and then decreased. The purpose of the leaching and cyclic leaching tests was to study the change in existing equilibrium fabric caused by subsequent changes in the concentration of salt in pore fluid. Results of the suspension tests indicate that sediment volume of a water suspension decreases with increase in ion concentration and increase in valence of cation. Leaching and cyclic leaching tests indicate that substantial change in salt concentration is required to change the existing fabric. The effect of dielectric constant of pore fluid on sediment volume is somewhat complex. As the dielectric constant increases from 1.9 for heptane to 110 for formamide, sediment volume first decreases, assuming a minimum at 24 for ethanol, increases with a maximum at 80 for water, and decreases again until 110 for formamide. An approximate physico-chemical analysis model is used to interpret some of the data in a quantitative manner. In the analysis model, recently developed theories of double-layer repulsive and van der Waals attractive forces are combined to simulate the behavior of suspensions.

Keywords

Dielectric ConstantIon ConcentrationKaoliniteLeachedMixedSedimentSuspensionValence of CationVolume
Type
Research Article
Information
Clays and Clay Minerals , Volume 46 , Issue 2 , April 1998 , pp. 145 - 152
Copyright
Copyright © 1998, The Clay Minerals Society

References

Anandarajah, A., 1994 Discrete element method for simulating behavior of cohesive soils Journal of Geotechnical Engineering Division, ASCE 120 1593–1615 10.1061/(ASCE)0733-9410(1994)120:9(1593).CrossRefGoogle Scholar
Anandarajah, A., 1997 Influence of particle orientation on one-dimensional compression of montmorillonite J Colloid Interface Sci 194 44–52 10.1006/jcis.1997.5068.CrossRefGoogle ScholarPubMed
Anandarajah, A. and Chen, J., 1994 Double-layer repulsive force between two inclined platy particles according to Gouy-Chapman Theory J Colloid Interface Sci 168 111–117 10.1006/jcis.1994.1399.CrossRefGoogle Scholar
Anandarajah, A. and Chen, J., 1997 Van der Waals attractive force between clay particles in water and contaminant Soils and Foundations, Japanese Society of Soil Mechanics and Foundation Engineering 37 27–37.Google Scholar
Anandarajah, A. and Lu, N., 1992 Numerical study of the electrical double-layer repulsion between non-parallel clay particles of finite length Int J Numer Analytical Methods Geome-chanics 15 683–703 10.1002/nag.1610151002.CrossRefGoogle Scholar
Anandarajah, A. Zhao, D., Fang, H.-Y. and Inyang, H.I., 1996 Stress-strain behavior of contaminated kaolinite Int Symp on Environmental Geotechnology 3rd San Diego, CA. Technomic Publ Co 180–188.Google Scholar
Bolt, G.H., 1956 Physico-chemical analysis of the compressibility of pure clays Geotechnique 6 86–93 10.1680/geot.1956.6.2.86.CrossRefGoogle Scholar
Chen, J., 1996 Physico-chemical analysis of contaminated clays [Ph.D. diss.] Baltimore, MD The Johns Hopkins Univ.Google Scholar
Grim, R.E., 1968 Clay mineralogy 2nd New York McGraw-Hill.Google Scholar
Mesri, G. and Olson, R.E., 1971 Mechanism controlling the permeability of clays Clays Clay Miner 19 151–158 10.1346/CCMN.1971.0190303.CrossRefGoogle Scholar
Peavy, H.S. Rowe, D.R. and Tchobanglous, G., 1985 Environmental engineering New York. McGraw-Hill.Google Scholar
Pusch, R., 1966 Quick-clay microstructure Eng Geol 1 433–443 10.1016/0013-7952(66)90019-6.CrossRefGoogle Scholar
Quigley, R.M. and Thompson, C.D., 1966 The fabric of anisotrop-ically consolidated sensitive marine clays Can Geotech J 3 61 10.1139/t66-008.CrossRefGoogle Scholar
Van Olphen, H., 1977 An introduction to clay colloid chemistry New York Wiley Interscience.Google Scholar
Verwey, E.J.W. and Overbeek, J.T.G., 1948 Theory of the stability of lyophobic colloids .Google Scholar
Weitz, D.A. Lin, M.Y. and Lindsay, H.M., 1991 Universal laws in coagulation Chemometrics and Intelligent Laboratory 10 133–140 10.1016/0169-7439(91)80043-P.CrossRefGoogle Scholar