摘   要：传统水泥砂浆保水性、黏聚性差，导致砂浆的收缩性大，抹面易开裂，施工性能差。加入一定量的橡胶粉，虽然在一定程度上降低水泥砂浆的强度，但是其抗裂性能得到大幅提升，同时有效利用了废旧橡胶。研究了橡胶粒径、掺量对水泥砂浆强度、抗裂性能的影响，结果表明，橡胶粒径对水泥砂浆的影响起伏较大；一定范围内，橡胶掺量越大，水泥砂浆的抗压、抗折强度下降越大，但抗裂性能越强。

Abstract: The traditional cement mortar has a poor water retention and cohesiveness, which leads to a large shrinkage, easily cracking for plastering and a poor construction performance. Although adding a certain amount of rubber powder may reduce the strength of cement mortar to a certain extent, its crack resistance gets significantly improved and meanwhile, the waste rubber is made good use. The influence of rubber particle size and rubber content on the strength and crack resistance of cement mortar were studied, the results showed that, the influence of the rubber particle size on the cement mortar fluctuates strongly; within a certain range, the larger dosage of rubber, the bigger reduction in both compressive strength and flexural strength, the stronger in crack resistance of cement mortar.