【摘要】 通过普通混凝土、橡胶混凝土、硅烷偶联剂改性橡胶混凝土的对比试验，研究了硅烷偶联改性剂对废轮胎橡胶混凝土的抗压性能的改善效果；借助SEM、EDS等试验，揭示了硅烷偶联剂对废轮胎橡胶混凝土抗压性能影响的微观机制。结果表明：5%橡胶颗粒掺量的橡胶混凝抗压强度比普通混凝土抗压强度下降了13.2%，其水化产物中Si元素的分布有所改变；硅烷偶联改性剂的加入改变了橡胶混凝土的抗压性能、微观形貌及水化产物数量；使橡胶混凝土抗压强度提高8.2%；对于界面过渡区（ITZ）性能，硅烷偶联剂加入后，改性橡胶混凝土ITZ形貌致密，厚度减小，钙硅比降低，稳定性增加，C-S-H含量增加，Ca元素分布有所改变。更多还原

【Abstract】 Through the comparative experimen of ordinary concrete,rubber concrete and silane coupling agent modified rubber concrete,the improvement effect of silane coupling modifier on the compressive performance of waste tire rubber concrete has been studied,the microscopic mechanism of the influence of silane coupling agent on the compressive performance of waste tire rubber concrete was revealed by means of SEM,EDSexperiments.The results show that compared with ordinary concrete,the compressive strength of rubber concrete containing 5% rubber particles decreased by 13.2%,and the distribution of Si elements in the hydration products of rubber concrete was changed.The addition of silane coupling agent changes the compressive properties,hydration products and microstructure of the rubber concrete.The compressive strength of rubber concrete increased by 8.2%.As for ITZ,the thickness of ITZ between rubber particles and cement particles,its morphology becomes denser,the calcium-silicate ratio in ITZ declines,the microhardness and stability in ITZ increases,the content of C-S-H increases and the distribution of Ca is changed.更多还原