Abstract:China will produce a large number of abandoned silt due to the engineering construction every year. The traditional way of piling and dumping not only occupies the land but also causes secondary pollution easily. At present, it is a better treatment method to convert waste silt into engineering materials which can be used for filling by adding curing agent. But the commonly used silt curing agent has poor water stability and poor curing effect on silt with high water content, so it cannot be widely used. On the basis of previous studies, several commonly used curing agent admixtures were screened through a series of tests such as penetration test and unconfined compression test, so as to make a kind of curing agent with rapid curing effect for high-moisture silt and determine its optimal dosage. The mechanical properties of the solidified silt were studied, and the properties of the solidified silt were shown to be excellent. After 7 days of curing, the CBR value and strength of the solidified soil were in line with the requirements of engineering specifications. The microscopic characteristics of the solidified silt were analyzed by scanning electron microscope. It was found that the curing effect of the curing agent was derived from the chain structure formed by hydration of calcified polyacid and the polymerization with silt particles and mineral ions under alkaline conditions.
