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论文类型：会议论文

发表时间：2013-03-03

收录刊物：EI、Scopus

期号：231 GSP

页面范围：2091-2100

摘要：South-to-North Water Diversion project in China is the largest water diversion project of the world. This is a huge hydraulic engineering project, crossing Yangtze River, Huai River, Yellow River, and Hai River, total water volume of 44.8 billion m3 transferred per year. The middle line of the project is starting from Danjiangkou and ending at Beijing and Tianjin, total length of the main canal about 1432 km, 279.7 km of the main canal located in the expansive soil zone. In order to control the damage caused by the swelling of the expansive soil, cement was adopted as the major stabilizing agent to reduce the swelling potential and increase the strength of the soil. This research examined the physicochemical characterization of cement treated highly expansive soil (Handan clay) from the project. SEM analysis was conducted on Handan clay at different curing time (1h, 4h, 12h, 24h, and 7d) during cement treatment. The cations' concentration in the pore water before and after cement treatment was also examined at different time during a 7-day curing period. The cations of the exchange complex of treated Handan clay was also examined at different time (1h, 4h, 12h, 24h, and 7d) during a 7-day curing period. The strength development of the cement treated soil was investigated at different curing time (1h, 4h, 12h, 24h, and 7d).The testing results revealed the strength increasing mechanism of the cement treated expansive soil from chemical and miscrostructural point of view. ? 2013 American Society of Civil Engineers.