橡胶改良水泥稳定碎石基层工程力学性能研究
Research on Engineering Mechanical Properties of Rubber Cement Stabilized Crushed Stone Base Course

为了探究橡胶颗粒对水泥稳定碎石的无侧限抗压强度以及韧性等性能的影响，本文将水泥稳定碎石中的一部分集料替换成橡胶颗粒，设置成橡胶颗粒掺量分别为0%，2%，3%，4%，5%的试验组，并展开无侧限抗压试验，劈裂破坏试验和四点弯曲试验。试验结果证明，橡胶颗粒会显著降低水泥的抗压强度，降低速度随掺量增加而下降，同时橡胶颗粒的掺入会增强水泥稳定碎石的韧性，增强其抵抗劈裂及弯曲破坏的能力。研究成果为我国公路路基改良工程提供了一定借鉴作用。
In order to investigate the influence of rubber particles on the unconfined compressive strength and toughness of cement stabilized macadam, this paper replaces some aggregates of cement stabilized macadam with rubber particles and sets up the experimental group with rubber particles with the content of 0%, 2%, 3%, 4%, 5%, respectively. The unconfined compression test, split failure test and four point bending test are developed. The results show that rubber particles can significantly reduce the compressive strength of cement, and the decrease speed decreases with the increase in the amount of cement. Meanwhile, the rubber particles will enhance the toughness of cement stabilized macadam and enhance its ability to resist splitting and bending failure. The research results provide some references for improving highway subgrades in China.