江苏大学学报（自然科学版）2017，Vol.38Issue(3)：367-372,6.DOI:10.3969/j.issn.1671-7775.2017.03.020
拌和次序对热再生沥青混合料高温性能的影响
Effect of mixing sequence on high temperature performance of hot recycled asphalt mixture
摘要
Abstract
Three kinds of mixing sequences(A,B,C) and two asphalt binders(70#,90#) were selected to fabricate hot recycled asphalt samples.The superpave gyration compactor (SGC) was applied to investigate the change in different compaction parameters of construction densification index (CDI) and compactability energy index (CEI).The Hamburg wheel-track device (HWTD) was used to explore the variation of creep slope,which was utilized to evaluate the effect of mixing sequences on the high temperature of hot recycled asphalt mixtures.The results show that the CDI of sample compacted in mixing sequence B is increased by 14％ to 118％ than those in mixing sequence of A and C,while the CEI of sample compacted in mixing sequence B is decreased by 20％ to 53％ than those in mixing sequence of A and C.Mixing sequence has obvious effect on compaction parameters.The creep slope of asphalt sample compacted in mixing sequence B is relatively lower than those compacted in other two mixing sequences,which means the high temperature performance of sample compacted in mixing sequence B is better than others.The compaction parameters are related to creep slope.Compared with 90# recycled asphalt mixture,the creep slopes of 70# recycled asphalt mixtures are decreased by 37％,38％ and 37％ in mixing sequence A,B,C,respectively.The high temperature performance of 70# binder recycled mixtures compacted in three mixing sequences is better than that of 90#.关键词
热再生沥青混合料/拌和次序/高温性能/压实参数/蠕变斜率Key words
hot recycled asphalt mixture/mixing sequence/high temperature performance/compaction parameter/creep slope分类
交通工程引用本文复制引用
雷勇,汪海年,季传军,尤占平..拌和次序对热再生沥青混合料高温性能的影响[J].江苏大学学报（自然科学版）,2017,38(3):367-372,6.基金项目
国家自然科学基金资助项目(51578075) （51578075）
交通运输部应用基础研究计划项目(2014319812180) （2014319812180）
