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Effect of Sulphate on Compressive Strength of Cement Stabilized Soil

Zhanguo Li1, Wei Guo1, Yue Li1, Jinpeng Liu1, and Yanbing Wang2
1. Key Lab of Urban Securing and Disaster Engineering, Beijing University of Technology, Beijing 100124, China
2. Energy-Saveing & Environmental Protection Co., Ltd, MCC Group, Beijing, 100088, China

Abstract—Salt types and concentration have important effect on the performance of cement stabilized soil. In this paper, two kinds of sulfate were added into cement based material to prepare two kinds composite curing agents. Unconfined compressive strength of stabilized soil was studied. Then sulfate hydration products and micro morphology stabilized soil were analyzed. The results of the study show that, when cement based curing agent contained small amount of sulfate, strength of solidified soil is improved greatly; a preliminary analysis of the reasons may be formation of hydrated calcium sulphoaluminate in stabilized soil, which can fill in the pores and improve compactness of the stabilized soil structure, and thus improve the strength of the stabilized soil.

Index Terms—sulfate, cement, curing agent, soil stabilization

Cite: Zhanguo Li, Wei Guo, Yue Li, Jinpeng Liu, and Yanbing Wang, "Effect of Sulphate on Compressive Strength of Cement Stabilized Soil," International Journal of Structural and Civil Engineering Research, Vol. 4, No. 3, pp. 271-275, August 2015. doi: 10.18178/ijscer.4.3.271-275