再生沥青混合料疲劳性能试验研究  

Experimental Research on Fatigue Characteristics of RAP Mixtures

作　　者：张志祥[1] 吴建浩[2] 

机构地区：[1]东南大学交通学院,江苏南京210096 [2]江苏省交通科学研究院,江苏南京210017

出　　处：《中国公路学报》2006年第2期31-35,共5页China Journal of Highway and Transport

摘　　要：为了评价掺有再生沥青路面(RAP)材料的沥青混合料的疲劳性能,以及不同RAP材料用量对沥青混合料疲劳性能的影响,进行了室内再生沥青混合料疲劳试验研究。疲劳试验中采用了沥青路面表面层沥青混合料,选用了间接拉伸(IDT)强度试验和半圆弯曲(SCB)疲劳试验方法,进行了RAP材料质量分数分别为0%、10%、20%和30%的疲劳试验。试验结果表明:沥青混合料中RAP材料质量分数小于20%时,对沥青混合料疲劳性能影响不大,而RAP材料质量分数为30%时,疲劳性能明显下降。初步建议了表层沥青混合料合适的RAP材料质量分数不宜超过20%。Authors presented the preliminary findings of a laboratory study, in which the fatigue characteristics of hot-mix asphalt mixtures containing recycled asphalt pavement （RAP） were evaluated. A typical surface mixture was evaluated at 0, 10, 20, and 30 percent of RAP content. Fatigue characteristics of mixtures were evaluated through indirect tensile strength, seml-clrcular bending （SCB）. The result of tests shows that the influence of RAP material to the fatigue characteristics of mixture is smaller when the RAP content is lower than 20%, and the fatigue characteristics of RAP mixture drop down rapidly when the RAP content is 30%. To ensure the fatigue characteristics of RAP mixture, the proper RAP content in the surface mixture was recommended.

关 键 词：道路工程 再生沥青混合料 试验研究 疲劳性能 表层沥青混合料 

分 类 号：U414.1[交通运输工程—道路与铁道工程]