Cement Type Effect on Improvement of Clayey Soil Properties

Abstract

In this paper, some geotechnical properties of low-plasticity clay blended with calcium aluminate cement (CAC) at different contents were investigated and compared with those of sulfate-resistant cement (SRC)-blended law plasticity clay. As the liquid limits of CAC and SRC-blended low-plasticity clay decreased, their plastic limits increased. Additionally, the liquid limit and the plastic limit of CAC-blended low-plasticity clay were found to be lower than those of SRC-blended low-plasticity clay. The optimum moisture content and maximum dry density of low-plasticity clay were increased by both CAC and SRC agents. Moreover, the optimum moisture content and maximum dry density values of CAC-blended law plasticity clay were higher than those of SRC-blended low-plasticity clay. The shear strength of low-plasticity clay was also increased with the CAC and SRC additives. The internal friction angles of CAC-blended low-plasticity clay were higher than those of SRC-improved law plasticity clay under both the wet-cured and air-dried conditions. The cohesion intetrepts of CAC-improved low-plasticity clay under both the wet-cured and air-dried conditions were lower than those of SRC-improved low-plasticity clay. The compressibility and swell characteristics of law plasticity clay were considerably reduced with both CAC and SRC admixtures. However, the swell and compressibility of CAC-blended low-plasticity clay were lower than those of SRC-blended law plasticity clay. Generally; the CAC agent was more effective than the SRC agent in the improvement of aformentioned low-plasticity clay properties.