川西高原沥青路面高频冻融破坏机理研究  

作　　者：王海朋 张晓华 杨晋 贺丞钧 万俊超 

机构地区：[1]四川省公路规划勘察设计研究院有限公司,成都611130 [2]西华大学,成都610039

出　　处：《科技创新与应用》2025年第7期58-62,共5页Technology Innovation and Application

基　　金：四川省交通运输科技项目(2022-A-2)。

摘　　要：针对川西高原山区沥青路面易出现高频冻融破坏的问题,对代表性路段沥青路面进行调研,通过埋设传感器的方式监测路面结构内的温度情况,在此基础上,建立高频冻融室内试验方法,将紫外、热氧老化和高频冻融试验结合,采用劈裂强度指标,研究川西高原山区沥青路面的高频冻融机理。结果表明,老化对高频冻融的影响很大,采用“紫外+热氧老化+高频冻融”的方法,可以模拟高频冻融的最不利破坏情况;沥青混合料的劈裂强度随冻融次数增加呈线性降低;相对SBS改性沥青混合料,橡胶沥青混合料可更好地抵抗高频冻融破坏。In view of the problem that asphalt pavements in the mountainous areas of the western Sichuan Plateau are prone to high-frequency freeze-thaw damage,asphalt pavements on representative sections were investigated,and the temperature conditions within the pavement structure were monitored by embedding sensors.On this basis,a high-frequency freeze-thaw indoor test method was established.The method combines UV(ultraviolet),thermal oxygen aging and high-frequency freeze-thaw tests,and uses the splitting strength index to study the high-frequency freeze-thaw mechanism of asphalt pavements in the mountainous areas of the western Sichuan Plateau.The results show that aging has a great impact on high-frequency freeze-thaw,and the"UV+thermal oxygen aging+high-frequency freeze-thaw"method can simulate the most unfavorable damage situation of high-frequency freeze-thaw;the splitting strength of asphalt mixture decreases linearly with the increase of freeze-thaw times;compared with SBS modified asphalt mixture,rubber asphalt mixture can better resist high-frequency freeze-thaw damage.

关 键 词：道路工程 高频冻融 破坏机理 紫外老化 橡胶沥青 

分 类 号：U414[交通运输工程—道路与铁道工程]