对冻融循环作用后的橡胶颗粒混合土（RST混合土）进行无侧限抗压强度试验，分析强度影响规律。结果表明，在28d养护龄期，虽然掺入橡胶颗粒的RST混合土抗压强度相对水泥土会降低，但是其抗冻融性能比水泥土强；冻融循环5次后，随着水泥掺量的增大，掺有橡胶颗粒的试件强度的提高率明显强于未掺入橡胶颗粒的试件；冻融循环5次后，橡胶颗粒的掺入从一定程度上减缓了由于含水量的不同而导致的RST混合土强度的降低速率。

The rubber granular mixed soil (RST mixed soil) after freeze-thaw cycle is selected to conduct unconfined compressive strength test and analyze the influence law of strength. The results show that at the 28d curing age, although the compressive strength of RST mixed soil is lower than that of cement soil, its freeze-thaw resistance is stronger than that of cement soil. After 5 freeze-thaw cycles, with the increase of cement content, the increase rate of strength of specimens mixed with rubber particles is significantly stronger than that of specimens not mixed with rubber particles. After 5 freeze-thaw cycles, the addition of rubber particles slows down the rate of strength reduction of RST mixed soil due to different water content to a certain extent.

TU445

内蒙古自治区教育厅课题“冻融循环作用下橡胶颗粒轻质混合土（RST轻质土）强度特性试验研究”（NJZY20184）；包头铁道职业技术学院课题“冻融循环作用下橡胶颗粒轻质混合土（RST轻质土）强度特性试验研究”（BTZY201911）