Abstract: To investigate the mechanical properties of polyurethane cement mortar (PCM), a series of tests were conducted to evaluate its compressive strength, tensile strength, elastic modulus, and hysteresis characteristics. The results demonstrated that PCM with a polyurethane-to-cement ratio of 1:2 and a cement content of 40% exhibited higher compressive strength, tensile strength, and elastic modulus, along with a reduction in elongation at break. Meanwhile, in order to verify its elastic recovery performance, the material was subjected to loading, unloading, and reloading at a strain amplitude of 0.55. The experimental results revealed that PCM displayed favorable hysteresis characteristics. Finally, the failure mechanism of PCM was examined through microscopic analysis.
Key words: polyurethane matrix; cement mortar; tunnel; isolation material; mechanical property test
王少锋, 曹翔鹏. 聚氨酯基体与细骨料组成的隧道隔震材料的力学性能试验研究[J]. 隧道与地下工程灾害防治, .
WANG Shaofeng, CAO Xiangpeng. Experimental study on mechanical properties of tunnel isolation material composed of polyurethane matrix and fine aggregate. Hazard Control in Tunnelling and Underground Engineering, 0, (): 1-12.
