水力发电学报2025，Vol.44Issue(11)：81-88,8.DOI:10.11660/slfdxb.20251108
纤维沥青混凝土裂缝愈合特性研究及评价方法
Study on evaluation method of crack healing characteristics of fiber-reinforced asphalt concrete
摘要
Abstract
For the impervious layer in hydraulic asphalt concrete panels,this study examine its crack-healing characteristics by conducting beam bending tests,crack observation,and ultrasonic non-destructive testing on fiber-reinforced asphalt concrete.We make a comparative analysis of its crack-healing behaviors with those of the reference asphalt concrete,focusing on mechanical properties and structural integrity.Experimental results show that after seven days of a fiber concrete specimen immersed in water,its fibers'adsorption effect and elastic properties maintain the stability of its mechanical properties.Its bending healing rate reaches up to 95%,whereas the reference concrete has a rate as low as 41%.Water environment promotes surface healing significantly,with the highest rate up to 97%,far superior to that in dry conditions.For the fiber concrete,its internal damage healing is characterized with hysteresis-strengthening.The initial-stage healing hysteresis is attributed to the oil absorption effect of fibers,increasing the thickness of structural asphalt,while the synergistic deformation of fibers and asphalt ensures excellent continuous healing performance in the period of seven days.This study further achieves a multi-index collaborative evaluation method for the crack-healing performance of fiber-reinforced hydraulic concrete,and lays a basis for its engineering application.关键词
水工沥青混凝土/防渗层/裂缝愈合/纤维/超声无损检测Key words
hydraulic asphalt concrete/impermeable panel/crack healing/fiber/ultrasonic nondestructive testing分类
建筑与水利引用本文复制引用
李洋,吴文博,闵永涛,郝如升,张伟,贺晶晶..纤维沥青混凝土裂缝愈合特性研究及评价方法[J].水力发电学报,2025,44(11):81-88,8.基金项目
陕西省创新能力支撑计划项目(2020KJXX-099) （2020KJXX-099）
陕西省混凝土结构安全与耐久性重点实验室开放基金(sz02403) （sz02403）
