(内蒙古科技大学土木工程学院， 包头 014010)

［摘要］橡胶混凝土在低温下的力学性能与常温相比有较大差异。为研究橡胶混凝土低温下的力学性能，使用粒径为5~10目的橡胶颗粒等体积代替砂，配制了水胶比为0.35，0.40，0.45，橡胶掺量分别为0%，10%，20%，30%的橡胶混凝土。通过对比低温-30℃和常温20℃下橡胶混凝土力学性能的试验结果，分析低温-30℃下橡胶混凝土轴心抗压强度、抗折强度及应力-应变曲线等随水胶比及橡胶掺量的变化规律。结果表明：低温下，橡胶混凝土力学性能和变形能力较常温相比均有所提高，水胶比越大，提高幅度越大；低温下，橡胶混凝土应力应变曲线的变化趋势与常温基本一致，但其应力和应变都有较大幅度提高；低温下，随着橡胶掺量的增加，橡胶混凝土折压比逐渐增大，橡胶混凝土的脆性得到改善，延性明显增强。 

［关键词］低温；橡胶混凝土；力学性能；变形能力；水胶比 

中图分类号：TU501,TU375 文献标识码：A文章编号：1002-848X(2021)16-0121-06

Experimental study on axial compressive and flexural properties of rubber concrete at low temperature 

XUE  Gang,  SUN  Lisuo,  XU  Sheng 

(School of Civil Engineering, University of Inner Mongolia Science and Technology, Baotou 014010， China) 

Abstract: The mechanical properties of rubber concrete at low temperature are quite different from those at normal temperature. In order to study the mechanical properties of rubber concrete at low temperature, rubber particles with the size of 5~10 mesh were used instead of sand. The rubber concrete with the water rubber ratio of 0.35, 0.40 and 0.45 and the rubber content of 0%, 10%, 20% and 30% were prepared. By comparing the test results of mechanical properties of rubber concrete at -30℃ at low temperature and 20℃at normal temperature, the change rules of axial compressive strength, flexural strength and stress-strain curve of rubber concrete with water binder ratio and rubber content at -30℃ at low temperature were analyzed. The results show that at low temperature, the mechanical properties and deformation capacity of rubber concrete are improved compared with that at normal temperature, and the larger the water binder ratio is, the greater the improvement range is. At low temperature, the change trend of stress-strain curve of rubber concrete is basically the same as that of normal temperature, but the stress and strain of rubber concrete are greatly increased. At low temperature, with the increase of rubber content, the flexural compression ratio of rubber concrete increases gradually, and the brittleness and ductility of rubber concrete are improved. 

Keywords:low temperature； rubber concrete； mechanical property； deformation capacity； water binder ratio

*国家自然科学基金资助项目（51868063）。

 作者简介：薛刚，博士，教授，硕士生导师，Email:xuegang-2008@126.com； 通信作者：孙立所，硕士研究生，Email:714145391@qq.com。