ABSTRACT
High liquid plastic limit clay has the characteristics of high moisture content, obvious seasonal frozen layer and low bearing capacity. In order to study the curing effect of cement fly ash curing agent on high liquid plastic limit clay. The optimal ratio of curing agent was determined by limit moisture content test and triaxial test. The results show that, Adding fly ash can change the strength of solidified soil. With the increase of fly ash content, cohesion and effective cohesion first increase and then decrease. The content of turning point is about 15% of the best fly ash content, and the internal friction angle and effective internal friction angle increase continuously. Under a certain amount of fly ash, with the increase of cement mixing ratio, the amount of cement hydration increases, and the cementation filling effect is obvious, resulting in a large increase in cohesion and internal friction angle, and the strength of solidified soil increases. It is feasible to mix cement and fly ash for the curing of high liquid-plastic limit clay, and the curing effect is the best when the cement and fly ash content is C15F15 under the premise of meeting the practical engineering problems and economic benefits.
