环氧沥青混凝土增柔增韧改性技术  

Technique research on flexibility and toughness modification for epoxy asphalt concrete

作　　者：张争奇[1] 张苛[1] 李志宏[1] 姚晓光[1] 王康 

机构地区：[1]长安大学教育部特殊地区公路工程重点实验室,陕西西安710064 [2]中国民航机场建设集团公司,北京100101

出　　处：《长安大学学报（自然科学版）》2015年第1期1-7,共7页Journal of Chang’an University(Natural Science Edition)

基　　金：江苏省交通科学研究计划项目(2010Y11);交通运输部应用基础研究项目(2014 319 812 151)

摘　　要：为了解决环氧沥青混凝土在钢桥面铺装层使用中存在的固化后脆硬,同桥面板变形一致性差,以及易出现开裂的问题,通过在环氧沥青混凝土中添加橡胶颗粒、聚酯纤维来提高其柔性和韧性。采用低温弯曲试验和弯曲疲劳试验,评价不同掺量的橡胶颗粒和聚酯纤维对环氧沥青混凝土弯曲破坏应变和疲劳寿命等指标的影响。研究结果表明:橡胶颗粒和聚酯纤维能改善环氧沥青混凝土的柔性和韧性,橡胶颗粒在与环氧沥青形成的共混体系中通过银纹作用显著提高了混合料的柔性性能,其最佳掺量为2.1%;而掺入聚酯纤维后,环氧沥青混凝土中形成的结构沥青和纤维网共同作用,大大提高了混合料的韧性性能,其最佳掺量为0.3%。To solve the problem of hardness and brittleness after the hardening of epoxy asphalt concrete in steel deck pavement,its poor coordination with the bridge deck,and its proneness to crack,a means was introduced to improve the flexibility and toughness of epoxy asphalt concrete by adding rubber particles and polyester fiber.The low-temperature bending test and bending fatigue test were carried out to analyze the influence of rubber particles and polyester fiber on bending failure strain and fatigue life of epoxy asphalt concrete.The results show that the flexibility and toughness of epoxy asphalt concrete can be improved after adding rubber particles and polyester fiber.The flexible performance of the mixture is improved through the crazing effect caused by adding rubber particles,and the optimum dosage of rubber particle is 2.1%.While polyester fiber greatly improves the toughness properties of the mixture through the combined action of structure-asphalt and fiber net developing in the blends,and the optimum dosage of polyester fiber is 0.3%.

关 键 词：道路工程 环氧沥青混凝土 橡胶颗粒 聚酯纤维 柔性 韧性 

分 类 号：U416[交通运输工程—道路与铁道工程]