用于高模量沥青砼的复合改性硬质沥青低温性能  

Low-temperature performance of composite modified hard asphalt used in high modulus asphalt concrete

作　　者：夏全平 高江平[1] 罗浩原 张其功 李志杰 杨飞 XIA Quan-ping;GAO Jiang-ping;LUO Hao-yuan;ZHANG Qi-gong;LI Zhi-jie;YANG Fei(Highway School,Chang′an University,Xi′an 710064,China;Shandong Transportation Service Center,Jinan 250002,China;School of Transportation,Southeast University,Nanjing 211189,China;Dongying Highway Development Center,Dongying 257091,China;Shandong Jingjian Group Co.,Ltd.,Weifang 262100,China;Shandong Academy of Communications Sciences,Jinan 250031,China)

机构地区：[1]长安大学公路学院,西安710064 [2]山东省交通运输事业服务中心,济南250002 [3]东南大学交通学院,南京211189 [4]东营市公路事业发展中心,山东东营257091 [5]山东景建集团公司,山东潍坊262100 [6]山东省交通科学研究院,山东济南250031

出　　处：《吉林大学学报（工学版）》2022年第3期541-549,共9页Journal of Jilin University:Engineering and Technology Edition

基　　金：国家自然科学基金项目(51008033).

摘　　要：为了寻找高温稳定性良好且具备足够低温抗裂性能的硬质沥青作为高模量沥青混凝土的胶结材料,选取SBS改性沥青对6类天然硬质沥青进行复合改性,进而对复合硬质改性沥青、沥青胶浆、沥青混合料的低温性能进行全面考察。结果表明:经过改性后,沥青、沥青胶浆、沥青混合料的低温性能有了不同程度的改善;在众多低温性能的评价指标中,沥青胶浆的低温临界开裂温度(T_(CR))与混合料低温弯曲的测试结果最具相关性,在进行高模量沥青混凝土胶结料选择时,应尤其注重对该项指标的考察。To find hard asphalts with perfect high temperature stability and low temperature crack resistance as the cementation material of high-modulus asphalt concrete,SBS modified asphalt was used to modify six kinds of natural hard asphalt.The relationship between the dosage of SBS and the dynamic modulus of the mixture was explored.The low-temperature performance of this hard asphalt before and after the modification was investigated from the three levels including asphalt,asphalt mortar and asphalt mixture.The results show that the low temperature performances of the modified asphalt,asphalt mortar,and mixture also have different degrees improvements.It is a good choice for producing high-modulus asphalt concrete.The study also found that among the many low-temperature performance evaluation indicators,low-temperature critical cracking temperature (T;) of asphalt mortar is the most relevant to the test results of low-temperature bending of the mixture.When selecting asphalt binder for high-modulus asphalt concrete,special attention should be paid to this indicator.

关 键 词：道路工程 高模量沥青混凝土 硬质沥青 低温抗裂性能 抗车辙性能 界面黏附系数 

分 类 号：U414[交通运输工程—道路与铁道工程]