Engineering behaviour of lime stabilized clays at high water content

摘要

This paper presents stress-strain-strength, stiffness, compressibility, expansibility andrnpermeability characteristics of lime stabilized soft clays at high water content Three soils of low to highrnplasticity (plasticity index = 13 to 47%) were used in the study. Unconfined compressive strength (q_u) andrnlime content relationships can be divided into 3 zones, namely inactive, active and inert zones. Marked increasernin qu with lime content and curing time was found. The axial strain at failure (ε_f) decreased with the increasernof lime content (or decreasing clay-water/lime ratio) and curing time. The initial stiffness and secantrnstiffness increased considerably with the increase of lime content and curing age. Results from onedimensionalrnconsolidation tests showed marked increase in preconsolidation pressure and reduction in compressionrnindex and swell index with increasing lime content and curing time. The effect of cementation is tornincrease the values of coefficient of consolidation (c_v) and coefficient of volume compressibility (m_v). Thernhigher the lime content and curing time, the lower is the value of cv and mv. Compared with untreated clays,rnlime stabillization increased the permeability of the clays. The coefficient of permeability reduced with increasingrnlime content and curing time. Permeability and void ratio relationships have also been proposed.