【摘要】 对比3种橡胶改性方式下的橡胶水稳碎石混合料，通过电镜扫描（scanning electron microscope,SEM）与能谱分析（energy dispersive spectrometry,EDS）选取最优的改性方法，对橡胶改性处理之后的水稳碎石混合料进行力学性能与收缩性能试验。结果表明：经NaOH与硅烷偶联剂KH-570复合改性处理之后的橡胶水稳碎石混合料，其橡胶-水泥基体界面过渡区的平均裂缝宽度最小，水化硅酸钙凝胶生成比例最大，界面过渡区结构最为紧密。在水稳碎石混合料中掺入复合改性处理后的橡胶，能够大大减少因掺入橡胶颗粒对混合料带来的强度损失，材料的抗收缩性能也未因橡胶颗粒的改性处理而减弱。更多还原

【Abstract】 This paper compares the rubber stabilized crushed stone mixtures prepared with three different rubber modification methods, and selects the optimal modification method using scanning electron microscopy(SEM) and energy dispersive spectroscopy(EDS) to conduct mechanical and shrinkage tests on the rubbermodified rubber-stabilized crushed stone mixture. The results indicate that after composite modification with NaOH and silane coupling agent KH-570, the rubber-stabilized crushed stone mixture exhibits the smallest average crack width in the rubber-cement matrix interface transition zone, the highest proportion of hydrated calcium silicate gel formation, and the most compact interface transition zone structure. Adding the composite modified rubber to the rubber-stabilized crushed stone mixture significantly reduces the strength loss caused by the addition of rubber particles, and the material’s shrinkage resistance is not compromised with the modification of rubber particles.更多还原