冻融作用对环氧沥青混凝土抗裂性能的影响（英文）

发布时间：2018-05-03 00:19

  本文选题：冻融循环 + 环氧沥青混凝土　； 参考：《Journal of Southeast University(English Edition)》2017年01期

【摘要】：根据北京市冬季气温调研,确定室内冻融循环试验周期,分别对7组环氧沥青混凝土试件进行不同次数的冻融循环,通过室内三点弯曲试验得到不同冻融循环次数下环氧沥青混凝土的弯曲劲度模量和断裂能,采用数值模拟方法计算不同冻融循环次数下环氧沥青混凝土的平面应变断裂韧度.研究结果表明:环氧沥青混凝土弯曲劲度模量随冻融循环次数的增加而减小,冻融循环次数为30次时,环氧沥青混凝土弯曲劲度模量的冻融损伤量为60%;环氧沥青混凝土断裂能和平面应变断裂韧度随冻融循环次数的增加呈先减小后增大的趋势,冻融循环为15次时,环氧沥青混凝土断裂能和平面应变断裂韧度达到最小值.
[Abstract]:According to the investigation of winter air temperature in Beijing, the indoor freeze-thaw cycle test period was determined, and seven groups of epoxy asphalt concrete specimens were subjected to different freeze-thaw cycles respectively. The flexural stiffness modulus and fracture energy of epoxy asphalt concrete under different freeze-thaw cycles were obtained by three point bending test in laboratory. The plane strain fracture toughness of epoxy asphalt concrete under different freeze-thaw cycles was calculated by numerical simulation. The results show that the flexural stiffness modulus of epoxy asphalt concrete decreases with the increase of freeze-thaw cycles, and when the freeze-thaw cycles are 30 times, The freezing and thawing damage of epoxy asphalt concrete flexural stiffness modulus is 60, and the fracture energy and plane strain fracture toughness of epoxy asphalt concrete decrease first and then increase with the increase of freeze-thaw cycle times, when the freeze-thaw cycle is 15 times, The fracture energy and plane strain fracture toughness of epoxy asphalt concrete are minimum.
【作者单位】： 东南大学智能运输系统研究中心;
【基金】：The National Natural Science Foundation of China(No.51378122)
【分类号】：U443.33

【参考文献】

中国期刊全文数据库 前1条

1 钱振东;胡靖;;Fracture properties of epoxy asphalt mixture based on extended finite element method[J];Journal of Central South University;2012年11期

【共引文献】

中国期刊全文数据库 前6条

1 张勐;钱振东;;冻融作用对环氧沥青混凝土抗裂性能的影响（英文）[J];Journal of Southeast University(English Edition);2017年01期

2 孙海军;陈苏;;环氧沥青砼疲劳及临界断裂机理研究[J];公路与汽运;2017年01期

3 马涛;张德育;张W，

本文编号：1836106