天津建设科技2024，Vol.34Issue(3)：23-26,38,5.DOI:10.3969/j.issn.1008-3197.2024.03.006
基于分档替换的RAP精分料Sup-20沥青混合料路用性能研究
Research on the Road Performance of Recycled Asphalt Pavement Fine Fractionation Sup-20 Based on Grading Replacement
摘要
Abstract
In order to study the impact of different grades of recycled asphalt pavement(RAP)fine aggregate on the per-formance of asphalt mixtures,this article relies on the oil stone separation technology and uses physical colli-sion to divide RAP fine aggregate into five grades:16-25mm,10-16mm,5-10mm,3-5mm,0-3mm.70#road petroleum asphalt is used as the new asphalt to replace the RAP fine aggregate Sup-20 in the mix design.Its road performance is verified from high temperature stability,low temperature crack resistance,and water stability.Research has shown that the effect of graded replacement on the optimal comprehensive asphalt stone ratio of asphalt mixtures is not significant,all around 4.5%;Grading replacement has little effect on the high-temperature stability of the mixture;The smaller the gear being replaced,the better the low-tempera-ture crack resistance and water stability performance;The six substitutions,including 100%dosage,do not meet the low-temperature crack resistance requirements of the specifications.Therefore,the addition of fine materials should be strictly controlled during the design process of RAP fine separation.关键词
道路工程/沥青混合料回收料/Sup-20/精分料/路用性能Key words
road engineering/recycled asphalt pavement/sup-20/fine separation of materials/road performance分类
交通工程引用本文复制引用
侍坛涛,程杰,董自明,吕秀浩,张世亮,边疆,王建威,王博,李家伟..基于分档替换的RAP精分料Sup-20沥青混合料路用性能研究[J].天津建设科技,2024,34(3):23-26,38,5.基金项目
连云港市重点研发计划(社会发展)(SF2239) （社会发展）
