Influence of salts on strength of cement-treated clays

This paper discusses the influence of salts on cement-treated clays. Three types of soil were studied: Bangkok Clay, bentonite and kaolinite. Two experimental methods were used. In the first method, homoionic clay was made with different concentrations of sodium and calcium to simulate the influence of naturally occurring salts on cement-treated clay. In the second method the clay was mixed with different quantities of sodium chloride (NaCl) and calcium chloride (CaCl2) to evaluate the influence of additional salt on cement-treated clay. All samples were investigated by using unconfined compression tests to determine the strengths of the cement-treated clays. Finally, the samples were evaluated by chemical analysis to study the changes in chemical properties. According to the experimental investigation, the influences of salts on cement-treated Bangkok Clay, bentonite and kaolinite varied as a result of the soil structure and chemical reactions. The mechanisms of the homoionic clay and the clay mixed with...

[1]  A. Whittle,et al.  Soil structure of a highly weathered old alluvium , 2004 .

[2]  Serge Leroueil,et al.  Influence of the nature of organic compounds on fine soil stabilization with cement , 2002 .

[3]  Christopher D. F. Rogers,et al.  Development of stabilisation and solidification in lime–clay mixes , 2001 .

[4]  M. Ohtsubo,et al.  Mineralogy and Chemistry, and Their Correlation with the Geotechnical Index Properties of Bangkok Clay. Comparison with Ariake Clay. , 2000 .

[5]  T. S. Nagaraj,et al.  COMPRESSIBILITY BEHAVIOUR OF SOFT CEMENTED SOILS , 1998 .

[6]  S. Leroueil,et al.  Mechanical and hydraulic behaviour of a soft inorganic clay treated with lime , 1996 .

[7]  Deng Min,et al.  Formation and expansion of ettringite crystals , 1994 .

[8]  Roger Perry,et al.  Organic compounds in the cement-based stabilisation/ solidification of hazardous mixed wastes—Mechanistic and process considerations , 1991 .

[9]  R. C. Joshi,et al.  Discussion: Change in pore size distribution due to consolidation of clays , 1990 .

[10]  Marc-André Bérubé,et al.  Laboratory investigations on the lime stabilization of sensitive clays: shear strength development , 1990 .

[11]  G. Stotzky,et al.  Adsorption and binding of amino acids on homoionic montmorillonite and kaolinite , 1982 .

[12]  G. Stotzky,et al.  Formation of Clay‐Protein Complexes , 1971 .

[13]  B. Warkentin.  Shear Strength of Montmorillonite and Kaolinite Related to Interparticle Forces , 1960 .