环氧预聚物改性煤沥青流变学特性研究  

Research on Rheological Properties of Epoxy Prepolymer Modified Coal Pitch

作　　者：李永翔 何智民 米世忠 王国忠[1] 贾永杰 LI Yongxiang;HE Zhimin;MI Shizhong;WANG Guozhong;JIA Yongjie(College of Energy and Transportation Engineering,Inner Mongolia Agricultural Uriiversity,Hohhot 010018,China;Inner Mongolia Autonomous Region Road Materials Recycling and Maintenance Engineering Technology Research Center,Hohhot 010010,China;Inner Mongolia Road and Bridge Engineering Technology Testing Corporation,Hohhot 010050,China)

机构地区：[1]内蒙古农业大学能源与交通工程学院,呼和浩特010018 [2]内蒙古自治区道路材料循环利用与养护工程技术研究中心,呼和浩特010010 [3]内蒙古路桥工程技术检测有限责任公司,呼和浩特010050

出　　处：《内蒙古农业大学学报（自然科学版）》2022年第1期59-65,共7页Journal of Inner Mongolia Agricultural University(Natural Science Edition)

基　　金：内蒙古自治区交通运输厅建设科技项目(NJ-2018-05,NJ-2018-07,NJ-2020-13);内蒙古自治区科技计划(2020GG0257,2021GG0082);能源与交通工程学院实验室开放项目(NYKF20200102,NYKF20200104)。

摘　　要：为改善煤沥青路用性能,采用过量环氧树脂(3.33倍反应量)与聚醚胺反应制备环氧树脂预聚物对煤沥青进行改性,研究了改性煤沥青的流变性能、抗老化性能和温度敏感性。结果表明,改性后的煤沥青10℃延度由0.0 cm增加到43.7 cm,-18℃劲度模量S由691 MPa降低到298 MPa,蠕变速率m由0.245增加到0.341,煤沥青的低温性能得到大幅提升;RTFOT老化试验质量变化由2.3%减小到0.8%,针入度指数由-9.7改变为-0.219,环氧树脂预聚物显著改善煤沥青的抗老化性和温度敏感性。In order to improve the road performance of the coal tar pitch,the rheological property,ageing resistance performance,and temperature sensitivity of the modified coal pitch were studied in this paper. An excess epoxy resin(3. 33 times the reaction amount)was used to react with the polyetheramine to prepare the epoxy resin prepolymer to modify the coal tar pitch. The results showed that the 10℃ ductility of the modified coal tar pitch increased from 0. 0 cm to 43. 7 cm,the-18℃ stiffness modulus S decreased from 691 MPa to 298 MPa,and the creep rate m increased from 0. 245 to 0. 341. The low temperature performance of the coal tar pitch was greatly improved. The quality change of the RTFOT aging test reduced from 2. 3% to 0. 6%,and the penetration index changed from-9. 7 to-0. 2. It indicated that the epoxy resin prepolymer significantly improved the aging resistance and temperature sensitivity of the coal tar pitch.

关 键 词：环氧预聚物 流变性能 煤沥青 抗老化性能 温度敏感性 

分 类 号：U416[交通运输工程—道路与铁道工程]