短期老化沥青混合料的低温抗裂性能  

Study on Low-Temperature Crack Resistance of Short-term Aging Asphalt Mixture

作　　者：金情芬 吴金荣[1,2] 叶树鹏 JIN Qingfen;WU Jinrong;YE Shupeng(School of Civil Engineering and Architecture,Anhui University of Science and Technology,Huainan 232001,China;Engineering Research Center of Underground Mine Construction,Ministry of Education,Huainan,Anhui 232001,China)

机构地区：[1]安徽理工大学土木建筑学院,安徽淮南232001 [2]矿山地下工程教育部工程研究中心,安徽淮南232001

出　　处：《洛阳理工学院学报（自然科学版）》2024年第1期21-26,共6页Journal of Luoyang Institute of Science and Technology：Natural Science Edition

基　　金：国家自然科学基金项目(2022CX2039)。

摘　　要：为了研究短期老化沥青混合料的低温抗裂性能,分析两种不同的沥青混合料老化温度(135℃短期老化4 h、155℃短期老化4 h)以及玄武岩纤维、聚酯纤维、木质素纤维和不同环境温度(0℃、-5℃、-10℃、-20℃)对沥青混合料低温抗裂性能的影响。相对于未老化的沥青混合料,经过短期老化的沥青混合料断裂能均有所下降;掺入聚酯纤维未经过老化的沥青混合料在0℃下的断裂能最高;随着试验温度的降低,半圆弯曲试验(SCB)试件的断裂能整体呈下降趋势。纤维掺料在提高沥青混合料的低温抗裂性能有帮助。In order to study the low-temperature crack resistance of short-term aging asphalt mixture,the effects of two different bitumen mixture aging temperatures(135℃short-term aging 4 h,155℃short-term aging 4 h),basalt fiber,polyester fiber,lignin fiber and different temperatures(0℃,-5℃,-10℃,-20℃)on the low-temperature cracking resistance of asphalt mixture are analyzed.The fracture energy of asphalt mixture after short-term aging is reduced compared with that of asphalt mixture that is not aged.Unaged asphalt mixtures mixed with polyester fibers have the highest breaking energy at 0℃.With the decrease of test temperature,the fracture energy of SCB specimens showed an overall downward trend.Fiber admixtures are helpful in improving the low-temperature crack resistance of asphalt mixtures.

关 键 词：SCB试验 短期老化 纤维 低温抗裂性能 

分 类 号：U414[交通运输工程—道路与铁道工程] TP311.5[自动化与计算机技术—计算机软件与理论]