聚丙烯纤维与TG固化剂对水泥石灰土强度及稳定性的影响

为提高水泥石灰综合稳定土的基层性能,选用聚丙烯纤维、TG土壤固化剂改良水泥石灰土。根据水泥和石灰含量、聚丙烯纤维掺量、TG固化剂剂量对水泥石灰土无侧限抗压强度的影响规律,从而确定水泥和石灰含量均为4%,聚丙烯纤维和TG固化剂掺量分别取0.2%、0.02%。在此基础上,研究了纤维与固化剂对水泥石灰土劈裂强度、收缩性、水稳定性及冻稳定性的影响。试验结果表明:经聚丙烯纤维与TG固化剂复合固化的水泥石灰土强度及稳定性提高效果最显著,优于高石灰掺量的水泥石灰土。

Effect of polypropylene fiber and TG curing agent on strength and stability of cement lime soil

In order to improve the engineering properties of inorganic binding material stabilized fine grained soil, polypropylene fiber and TG curing agent were used to reinforce cement lime soil. The ratio of cement and lime, the polypropylene fiber dosage, TG curing agent dose effect of unconfined compressive strength of cement lime soil, so as to determine the optimum inorganic binder content of 4%+4% cement lime, polypropylene fiber and TG curing agent dosage were 0.2%, 0.02%. On the basis of this study, the effects of fiber and curing agent on the splitting strength, drying shrinkage, temperature shrinkage, water stability and frost stability of cement lime soil were studied. The test results show that the strength and stability of cement lime stabilized by polypropylene fiber and TG curing agent are significantly improved, and it is better than the high lime content of cement lime soil.