The healing properties of asphalt mixtures suffered moisture damage
The healing properties of asphalt mixtures suffered moisture damage
复制标题
沥青混合料的愈合性能遭受水分损害
DOI：
10.1016/j.conbuildmat.2016.10.048
复制
发表时间：
2016-11-30
影响因子：
7.4
通讯作者：
Ye, Qunshan
中科院分区：
文献类型：
--
作者：
Sun, Yihan;Wu, Shaopeng;Ye, Qunshan
水损害是沥青路面的主要病害之一，通常会导致严重的强度损失和结构变形。本文旨在研究沥青混凝土水损害后的愈合性能。微波加热和感应加热都应用于本研究中以激活愈合。通过冻融劈裂试验、马歇尔浸水试验和三点弯曲试验对沥青混凝土的愈合性能进行了评价。结果表明，水的存在提高了沥青混合料的加热速度。微波加热和感应加热都只能部分修复沥青混合料因结构变形而引起的强度损失，而加热技术不能修复。水分的存在显着降低沥青混合料的愈合率诱导的感应加热或微波加热。认为裂纹表面的水分会阻碍裂纹的热愈合。建议沥青混合料在干燥条件下而不是在有水的情况下进行养护。(C)2016爱思唯尔有限公司版权所有
As one of the major distresses of asphalt pavement, the moisture damage usually results in a very serious loss of strength and structural deformation. This paper aimed to study the healing properties of asphalt concrete suffered moisture damage. Both microwave heating and induction heating were applied in this research to activate healing. A series of experiments including freeze-thaw splitting test, Marshall Immersion test and three-point bending test were conducted to evaluate the healing performance of asphalt concrete. It was found that the heating speed of asphalt mixtures was enhanced at the presence of water. The results also indicated that both microwave heating and induction heating could only partially heal the loss of strength of asphalt mixtures suffered moisture damage due to structural deformation of the samples, which could not be healed with heating technics. The presence of moisture significantly decreased the healing rate of asphalt mixtures induced by induction heating or microwave heating. It was believed that the moisture on crack surfaces could prevent the thermal healing of cracks. It is recommended that the asphalt mixtures be healed in dry condition rather than at the presence of water. (C) 2016 Elsevier Ltd. All rights reserved.