摘要
采用4种不同的沥青混合料,分别在水浴和空气浴2种试验环境下进行50℃和60℃的汉堡车辙试验,分析了水和温度对车辙深度的影响。进行不同试件厚度以及板式试件和SGC成型的圆柱试件的车辙试验,分析了试件厚度和成型方式对车辙深度的影响。分析结果表明:水环境和提高温度都会加速车辙的产生,50℃水浴和60℃空气浴车辙深度判定系数R2大于0.93;结合沥青应用情况,建议B级沥青采用45℃,A级沥青采用50℃,改性沥青采用60℃的试验温度;40 mm厚度的试件车辙深度显著偏大,试验中不宜采用;SGC成型的圆柱试件与板式试件试验结果判定系数R2达0.95以上,可以代替板式试件进行抗车辙性能评价。
Four kinds of asphalt mixtures were made and Hamburg wheel tracking tests were conducted with the specimens in the water and in the air at 50 ℃ and 60 ℃ individually,the influence of water and temperature on rutting depth was analyzed.The tests were carried on to analyze the influence of specimen thickness and molding ways on rutting depth.The result indicates that water and raising test temperature can accelerate rutting appearance.The correlation coefficients are over 0.93 when the specimens are in the water at 50 ℃ and in the air at 60 ℃.According to the application of asphalt types,the right test temperatures of B-grade asphalt,A-grade asphalt and modified asphalt are 45 ℃,50 ℃ and 60 ℃ respectively.The rutting depth of 40 mm-thickness specimen is much larger than that of others,which is not applicable for experiments.The test result of SGC cylindrical specimen has good relationship with that of plate specimen,their correlation coefficient is more than 0.95,so it can be used to evaluate the rut-resistance of asphalt mixture instead of plate specimen.7 tabs,5 figs,10 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2010年第2期30-35,共6页
Journal of Traffic and Transportation Engineering
基金
国家自然科学基金项目(50478095)
国家西部交通建设科技项目(200631881221)
关键词
路面材料
沥青混合料
汉堡车辙试验
试验方法
试验环境
试件厚度
成型方式
road material
asphalt mixture
Hamburg wheel tracking test
test method
test environment
specimen thickness
molding way
