水工沥青混凝土裂缝愈合特性研究  

Healing Characteristics of Cracks in Hydraulic Asphalt Concrete

作　　者：方伟 李洋[1] 贺晶晶 周雄雄 倪志鹏 卢浩丹 FANG Wei;LI Yang;HE Jingjing;ZHOU Xiongxiong;NI Zhipeng;LU Haodan(Power China Northwest Engineering Co.,Ltd.,Xi′an,Shaanxi 710100,China;College of Water Resources and Architectural Engineering,Northwest A&F University,Yangling,Shaanxi 712100,China)

机构地区：[1]中国电建集团西北勘测设计研究院有限公司,陕西西安710100 [2]西北农林科技大学水利与建筑工程学院,陕西省杨凌712100

出　　处：《水利与建筑工程学报》2024年第4期35-41,共7页Journal of Water Resources and Architectural Engineering

基　　金：国家自然科学基金资助项目(5207090694);陕西省自然科学基础研究计划资助项目(2021JQ-983);陕西省创新能力支撑计划项目(2020KJXX-099)。

摘　　要：为探究水工沥青混凝土裂缝愈合特性,通过小梁弯曲试验,分析温度变化与水环境作用对于普通沥青混凝土和玄武岩纤维沥青混凝土裂缝愈合规律的影响,提出裂缝愈合率,以评价沥青混凝土裂缝自愈合程度。研究结果表明:温度升高可提高普通沥青混凝土的裂缝愈合率,40℃时达到85%;而水环境作用下,裂缝愈合率明显降低,40℃为41%。纤维在裂缝间的“桥联”作用可显著改善沥青混凝土裂缝愈合性能,并且玄武岩纤维的掺入可减小长时间水环境对沥青混凝土裂缝愈合的不利影响,玄武岩纤维沥青混凝土在40℃时的愈合率为92%,40℃水环境时为95%。研究成果可为水工沥青混凝土抗裂设计提供参考。In order to investigate the healing characteristic of the cracks for hydraulic asphalt concrete,effects including the temperature changes and water environment,crack healing behavior of asphalt concrete and basalt fiber-reinforced as-phalt concrete were analyzed based on the beam bending tests.A crack healing coefficient was proposed to evaluate the degree of healing of the crack for asphalt concrete.The research results showed that an increase in temperature could im-prove the crack healing coefficient of asphalt concrete,reaching 85%at 40℃.However,due to the influence of the wa-ter environment,the crack healing coefficient decreased significantly with a value of 41%at 40℃.The bridging effect of short fibers between cracks could noticeably improve the healing performance of the crack for asphalt concrete,and adding basalt fibers could reduce the adverse effects of the long-term water environment on crack healing.The crack healing coefficient of basalt fiber-reinforced asphalt concrete was 92%at 40℃and 95%at 40℃in the water environ-ment.The research findings can provide references for the crack resistance design of hydraulic asphalt concrete.

关 键 词：水工沥青混凝土 玄武岩纤维 弯曲 裂缝愈合 

分 类 号：TU528[建筑科学—建筑技术科学]