紫外老化对抗燃油沥青混凝土抵抗疲劳开裂性能的影响  

Effect of Ultraviolet Aging on Fatigue CrackingResistance of Asphalt Concrete

作　　者：桑帆 陈忠华 于晓贺 罗蓉[1,2] FAN Sang;CHEN Zhonghua;YU Xiaohe;LUO Rong(School of Transportation and Logistics Engineering,Wuhan University of Technology,Wuhan 430063,China;Hubei Provincial Highway Engineering Technology Research Center,Wuhan 430063,China;Zhongnan Survey and Design Institute Group Co.Ltd.,Wuhan 430073,China)

机构地区：[1]武汉理工大学交通与物流工程学院,武汉430063 [2]湖北省公路工程技术研究中心,武汉430063 [3]中南勘察设计院集团有限公司,武汉430073

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第6期1131-1135,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：湖北省交通运输厅科技项目(2020-2-1-2);湖北省科技厅重点研发计划项目(2020BCA085)。

摘　　要：以埃塞俄比亚亚的斯亚贝巴BOLE机场改扩建项目为背景,对AC-13型沥青混凝土进行配合比设计,加入抗燃油剂并确定最佳掺量.基于单轴重复直接拉伸试验研究紫外老化对抗燃油沥青混凝土疲劳开裂性能的影响.结果表明:(1)PR AK抗燃油改性剂的最佳掺量为0.6%;(2)计算得到了修正Paris公式参数n_(J_R),说明抗燃油沥青混合料具有较强的抵抗疲劳开裂能力;(3)紫外老化对抗燃油沥青混凝土疲劳开裂性能的影响较为有限.Taking the reconstruction and expansion project of BOLE Airport in Addis Ababa,Ethiopia as the background,the mixture ratio of AC-13 asphalt concrete was designed,and the fire retardant was added and the optimum content was determined.Based on uniaxial repeated direct tensile test,the effect of ultraviolet aging on fatigue cracking performance of fuel-resistant asphalt concrete was studied.The results show that:①the optimum content of PRAK fuel-resistant modifier is 0.6%;②Parameter n J R of modified Paris formula is calculated,which shows that the fuel-resistant asphalt mixture has strong fatigue cracking resistance;③The influence of ultraviolet aging on fatigue cracking performance of fuel-resistant asphalt concrete is limited.

关 键 词：抗燃油沥青混凝土 疲劳开裂性能 修正的Paris公式 损伤密度 耗散虚拟应变能 紫外老化 

分 类 号：U414[交通运输工程—道路与铁道工程]