长沙理工大学学报（自然科学版）2023，Vol.20Issue(6)：100-108,9.DOI:10.19951/j.cnki.1672-9331.20220523001
SBS/PU复合改性沥青混合料性能试验研究
Experimental study on performance of SBS/PU composite modified asphalt mixture
摘要
Abstract
[Purposes]This study aims to investigate the performance of styrene-butadiene-styrene block copolymer(SBS)and polyurethane(PU)composite modified asphalt mixture.[Methods]The composite modified asphalt was prepared by 2.0%SBS and PU with different dosages(4.0%,6.0%and 8.0%),and modified asphalt was used to produce the dense-graded asphalt mixture AC-13.The high-temperature rutting resistance,low-temperature crack resistance and water stability of the asphalt mixture were evaluated by Marshall test,rutting test and low-temperature bending creep test were performed,and the modified asphalt mixture with 4.0%SBS and 6.0%PU was set as the control group.[Findings]SBS/PU composite modified asphalt mixture can meet the road performance requirements for asphalt pavement.Among them,the dynamic stability of 2.0%SBS+6.0%PU composite modified asphalt mixture was 144%,19%and 52%higher than that of matrix asphalt mixture,4.0%SBS modified asphalt mixture and 6.0%PU modified asphalt mixture,respectively.The high temperature stability of SBS/PU composite modified asphalt mixture was improved compared with that of the control group,and the water stability was comparable to that of the control group,and the improvement effect on low temperature performance was not obvious.[Conclusions]Considering the modification efficiency and economical efficiency,the optimal content of SBS/PU composite modified asphalt mixture is 2.0%SBS+6.0%PU.关键词
改性沥青/苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)/聚氨酯(PU)/复合改性/路用性能Key words
modified asphalt/styrene-butadiene-styrene block copolymer(SBS)/polyurethane(PU)/compound modification/pavement performance分类
交通工程引用本文复制引用
张映雪,朱文静,邱冬华,张浩..SBS/PU复合改性沥青混合料性能试验研究[J].长沙理工大学学报（自然科学版）,2023,20(6):100-108,9.基金项目
长沙理工大学科研创新项目(CX2021SS15) （CX2021SS15）
安徽省自然科学基金资助项目(1908085QE217) （1908085QE217）
海南省交通科技项目(J-ZX-ZAK-02-2021) Project(CX2021SS15)supported by Changsha University of Science&Technology Research and Innovation （J-ZX-ZAK-02-2021）
Project(1908085QE217)supported by Natural Science Foundation of Anhui Province （1908085QE217）
Project(J-ZX-ZAK-02-2021)supported by Transportation Science and Technology of Hainan Province （J-ZX-ZAK-02-2021）
