粘土固化浆液塑性强度增长规律及其影响因素

EFFECT FACTORS AND INCREASING LAW OF PLASTIC STRENGTH ( P S) OF CLAY HARDENING GROUTS

结构剂加量、水泥加量与粘土原浆粘度对粘土固化浆液的初凝时间都有影响，它们的影响程度各不相同，其中结构剂加量为２％时，初凝时间最短，仅几秒钟。粘土固化浆液塑性强度增长缓慢，早期强度低，后期强度（第１８天的塑性强度）可达数兆帕，调整水泥加量。

Gelling time of the Clay Hardening Grouts (CHG) can be adjusted from some dozens minutes to seconds by adding cement and constructure agent and adjusting the viscosity of the mud. Constructional agent being 2%, gel time is the shortest, about seconds. Content of cement and viscosity of clay mud will, also, affect the gelling time, but their effects are not the same. The increasing rate of plastic strength ( P s) of the grouts is slow, the early P s is lower, the later P s may be 1～2 MPa. After 18 th day, P s of the grouts may be some MPa by adjusting the content of cement, structural agent and viscosity of clay mud.