辉绿岩沥青混合料微波热诱导愈合性能研究
Study of the healing effects of microwave heat on diabase asphalt mixes
吴文亮 1彭俊霖 1韦嘉琪1
作者信息
- 1. 华南理工大学土木与交通学院,广州 510641
- 折叠
摘要
开展了辉绿岩沥青混合料微波热诱导愈合技术的应用研究.从矿料的化学组成、电磁参数上分析辉绿岩沥青混合料微波热诱导性能成因;制备了 GAC-13、SMA-13、OGFC-133种级配辉绿岩沥青混合料,并采用热常数仪、微波炉对混合料的微波热诱导升温速率展开研究;通过半圆弯曲(SCB)试验研究混合料的自愈合特性.结果表明:辉绿岩沥青混合料具有一定的微波热诱导性能,辉绿岩沥青混合料应用在密级配GAC-13上的热导率和热扩散率分别为 1.610 W/(m·K)、0.848 3 mm2/s,在断级配 SMA-13 中则为 1.649 W/(m·K)、0.878 5 mm2/s,二者的抗裂性能愈合率最高可达78.3％、79.4％,在微波热诱导和传热性能上表现更优越,有利于自行愈合.
Abstract
Pavement fractures may be fixed and the lifespan of asphalt pavements increased by employing microwave thermally induced healing technology on diabase pavements.We investigate the use of microwave thermally induced healing technology for diabase asphalt mixes.To identify the causes of microwave heat-induced healing of diabase asphalt mixes,the chemical composition of the minerals and electromagnetic parameters are first examined.Three different graded diabase asphalt mixes(GAC-13,SMA-13,and OGFC-13)are prepared,and the microwave heat-induced heating rate of the mixes is investigated with thermal constants and microwave ovens.Our findings reveal the diabase asphalt mixture has specific microwave heat-induced properties.When applied to dense graded GAC-13,the thermal conductivity and thermal diffusivity reach 1.610 W/(m K)and 0.848 3 mm2/s respectively.When applied to broken graded SMA-13,they stand at 1.649 W/(m K)and 0.878 5 mm2/s respectively.With a maximum healing rate of 78.3％and 79.4％,the two parameters perform better in microwave heat induction and transfer,which is beneficial for healing.
关键词
沥青混合料/辉绿岩/热常数/微波热诱导/自愈合Key words
asphalt mixture/diabase/heat constant/microwave thermal induction/self-healing引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据