Abstract
The effect of leaching on the properties of cemented sand deposits in Kuwait was examined by laboratory tests on samples taken from two sites with different cementation levels. The cementing agents identified include carbonates, sulfates, and chlorides. Tests included basic properties, consolidation, and consolidated undrained triaxial tests with pore pressure measurements. All tests were performed on natural and leached specimens. Leaching was carried out in the laboratory under low pressure using fresh tap water. The results indicate increased compressibility and a reduction of the effective shear strength parameters c′ and ϕ′ due to leaching. The effect is more pronounced for weakly cemented sands compared with moderately to strongly cemented sands. The effect of leaching depends on several factors including the soil type, relative density, grading characteristics, degree of cementation, and the amount of cementing agents and their solubility in water.
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