为提高混凝土的抗冲磨性能，研究粒状、针状、粉状橡胶对混凝土抗冲磨性能的影响，在粒状橡胶混凝土基础上掺入玄武岩纤维，研究纤维橡胶复合时混凝土的抗冲磨性能，结合SEM观察微观形貌，并分析其抗冲磨增强机理，运用分形维数表征混凝土磨损过程的形貌变化情况，并讨论分形维数与磨损程度的关系。结果表明：掺入15%的粒状、针状与粉状橡胶时，混凝土的抗冲磨强度分别提高了140.24%、157.96%、83.88%；当玄武岩纤维掺量为0.1%时，粒状橡胶混凝土抗冲磨强度提高了11.63%，纤维和橡胶能在不同层面上发挥作用，共同增强抗冲磨性能；混凝土磨损程度可用分形维数表征，随着时间的增加，混凝土磨损越严重，分形维数越大，得到了分形维数与质量损失率和体积损失率的关系，并建立了曲线方程。

In order to improve the abrasion resistance of concrete, the effects of granular, acicular and powdered rubbers on the abrasion performance of concrete were studied. Based on granular rubber concrete, basalt fiber was added to study the abrasion performance of concrete when fiber-rubber composite was used. The microstructure was observed by SEM and the abrasion enhancement mechanism was analyzed. The fractal dimension was used to characterize the morphology change of concrete abrasion process, and the relationship between fractal dimension and abrasion degree was discussed. The results show that when 15% of granular rubber, acicular rubber and powdered rubber are added respectively, the abrasion resistance of concrete increases by 140.24%, 157.96% and 83.88%. When the basalt fiber content is 0.1%, the abrasion resistance of granular rubber concrete increases by 11.63%. Fiber and rubber can play a role at different levels and jointly enhance the abrasion resistance. The degree of concrete abrasion can be characterized by the fractal dimension. With the increase of time, the more serious the concrete abrasion is, the larger the fractal dimension is. The relationship between fractal dimension and mass loss rate and volume loss rate is obtained, and the curve equation is established.

TU528.572

新疆自然科学基金（2019D01A46）