摘要
为探究RAP级配特征,剖析其对冷再生混合料性能的影响,基于抽提、击实和马歇尔试验对粗、细两档RAP展开研究。结果表明粗RAP中的中大块料多数由细料结团而成,性能受旧沥青影响;对于冷再生混合料,RAP掺量宜控制在40%~60%,粗、细比例得当时会轻微提升马歇尔稳定度。
To investigate the gradation characteristics of RAP and analyze its influence on the properties of cold recycled mixtures,two grades of RAP,coarse and fine,were studied based on the extraction,the compaction,and Marshall tests.The results show that most of the medium and large blocks in the coarse RAP are agglomerated by the fine materials,and the performance is affected by the old asphalt.For the cold recycled mixture,the RAP content should be controlled at 40%~60%,and the appropriate ratio of the coarse to the fine can increase Marshall stability.
作者
杨松翰
李响
张崇康
YANG Songhan;LI Xiang;ZHANG Chongkang(School of Civil Engineering,Northeast Forestry University,Harbin 150006,China;Jinpu Branch of Liaoning Expressway Operation Management Co.,Ltd.,Liaoning Dalian 116000,China)
出处
《低温建筑技术》
2022年第4期30-33,共4页
Low Temperature Architecture Technology
关键词
RAP
结团料
击实
级配变化
乳化沥青冷再生
RAP
milling materials
compaction
gradation change
cold recycling of emulsified asphalt
