Study of Early Strength and Shrinkage Properties of Cement or Lime Solidified Soil

摘要

Cement solidified sludge always exists serious phenomenon of shrinkage and cracking, which will adversely affected the project's strength and permeability and stability. The material used in this study is sludge with high water content from the construction sites in Wuchang town of Hangzhou city. In this paper, our main research is the influences of the initial water content of sludge(3 groups), cement content(8 groups), lime content(8 groups) and curing time (8 groups)on the curing shrinkage and strength of solidified sludge. The results show that the shrinkage increases with initial moisture, decreases with the increase of the cement or lime content, and increases with curing period. Increasing additives reduced the sensitivity of volume change to the moisture content changes, and adding sand reduced its shrinking to a certain extent. The Strength decreases with the increase of initial water content, increases with cement or lime content, and increases with curing period. The test has a certain reference value to the engineering practice.