WFO-CR改性沥青的分子结构变化与抗老化性能  

Molecular structure change and anti-aging performance of WFO-CR composite modified asphalts

作　　者：牛冬瑜 谢希望[2] 杨政险 张蔚 盛燕萍 熊锐[2] NIU Dongyu;XIE Xiwang;YANG Zhengxian;ZHANG Wei;SHENG Yanping;XIONG Rui(Research and Development Center of Transport Industry of Technologies,Materials and Equipments of Highway Construction and Maintenance,Gansu Road&Bridge Construction Group,Lanzhou 730030,Gansu Province,P.R.China;School of Materials Science and Engineering,Chang’an University,Xi’an 710061,Shaanxi Province,P.R.China;College of Civil Engineering,Fuzhou University,Fuzhou 350116,Fujian Province,P.R.China;Fujian Academy of Building Research Co.Ltd.,Fuzhou 350108,Fujian Province,P.R.China)

机构地区：[1]公路建设与养护技术、材料及装备交通运输行业研发中心(甘肃路桥建设集团有限公司),甘肃兰州730030 [2]长安大学材料科学与工程学院,陕西西安710061 [3]福州大学土木工程学院,福建福州350116 [4]福建省建筑科学研究院有限责任公司,福建福州350108

出　　处：《深圳大学学报（理工版）》2020年第6期589-596,共8页Journal of Shenzhen University(Science and Engineering)

基　　金：公路建设与养护技术、材料及装备交通运输行业研发中心(甘肃路桥建设集团有限公司)开放基金资助项目(GLKF201812);国家自然科学基金资助项目(51608045,51608046);福建省科技计划助项目(2019y0048);中交第二航务局工程有限公司福州公司科研合作项目(00501901)。

摘　　要：为充分利用固、液废弃资源,改善沥青高低温性能缺陷,将复配煎炸废油(waste frying oil,WFO)与废胎橡胶粉(crumb rubber,CR)用于制备改性沥青,以开发一种可持续路面材料.采用常规沥青试验、短期老化试验和傅里叶红外光谱试验,分析短期老化后不同质量分数WFO-CR复合改性沥青的性能指标及化学分子结构的变化规律.结果表明:短期老化后,不同质量分数WFO-CR复合改性沥青的残留针入度比、软化点增值和残留延度比均优于基质沥青,抗老化性能改善明显.傅里叶红外光谱试验结果表明,WFO-CR复合改性沥青中代表烯基或苯环C C键的814 cm^-1和720 cm^-1处的吸收峰峰值明显增大;不同质量分数WFO-CR复合沥青的羰基吸收峰和亚砜基吸收峰均有增强.由碳基指数和亚砜基指数定量分析可知,当WFO与CR的质量分数分别为5.0%和20.0%时,碳基指数和亚砜基指数最低,相比基质沥青分别降低了36.02%和32.04%,对沥青抗老化性能的改善效果最好.In order to use the solid and liquid waste resources to improve performances of base asphalt,waste frying oil(WFO)and crumb rubber(CR)are used to modify the asphalt to obtain the sustainable pavement material.The molecular structures and the performances of the modified asphalts with different amounts of WFO and CR are analyzed by conventional asphalt methods,short-term aging test and Fourier transform infrared spectroscopy(FT-IR).The results indicate that the retained penetration ratio(RPR),the softening point increment(SPI)and retained ductility ratio(RDR)indexes of modified asphalts with different amounts of WFO-CR composite are better than those of the base asphalt after short-term aging test.WFO and CR can improve anti-aging performance.Moreover,FT-IR results show that the absorption peaks at 814 cm^-1 and 720 cm^-1,which represent the alkenyl or benzene ring C C in WFO-CR composite modified asphalt after short-term aging,increase obviously.Both the carbonyl absorption peak and the sulfoxide absorption peak are improved for modified asphalts with different amounts of WFO-CR composite.The quantitative analysis shows that the carbonyl and sulfoxide indices of the modified asphalt reach the lowest values with 5.0%WFO and 20.0%CR,which are 36.02%and 32.04%lower than those of the base asphalt,respectively.

关 键 词：道路工程 改性沥青 短期老化 煎炸废油 废旧橡胶粉 傅里叶红外光谱 分子结构 

分 类 号：U414[交通运输工程—道路与铁道工程]