LIME STABILIZED MALAYSIAN COHESIVE SOILS

Abstract

This paper highlights the essential tests for assessing the suitability of lime forstabilizing soils and typical changes in soil characteristics due to modification and stabilizationprocesses with respect to mineralogical influences. The reasoning behind the mechanism of limeclay reaction on the compressive strength development of stabilized soils has been established.Clay with acidic origin exhibit less significant increase in compressive strength compared to claywith high intensity of kaolinite and with alkaline origin. In general, lime contents instituted,ranging from 3% to 6%, have contributed to a significant increase in unconfined compressivestrength, from 2.5 to 11 times of the untreated soils. The formation of calcium aluminates silicatehydrate (CASH) observed from XRD test, after 14 days, indicates the early formation of newproduct, due to lime-soil reaction. The effectiveness of stabilization process has been found to bedependent on the quality of the lime, clay fraction, mineralogy and the alkalinity of the soil.