橡胶粉改性沥青老化性能研究.pdf

2017年6月上 施工技术 第46卷第11期 CONSTRUCTION TECHNOLOGY 53 D0I:10.7672/5j52017110053 橡胶粉改性沥青老化性能研究* 刘延军12，叶志刚，张玉贞1 (1.中国石油大学（华东）化学工程学院，山东青岛266580：2.中海石油炼化有限贵任公司，北京100029) [摘要]采用3种老化试验方法模拟橡胶粉改性沥青老化过程，系统评价了在不同条件下3种橡胶粉改性沥青老 化性能的差异，并通过红外光谱分析了老化过程对橡胶粉改性沥青分子结构的影响.结果表明，橡胶粉改性沥青 在老化后软化点升高，针人度降低；不同类型橡胶粉改性沥青，老化规律基本一致，但老化后的性能存在一定差异. 红外光谱分析显示，橡胶粉改性沥青在老化前后的分子结构变化主要是基吸收峰的变化，RTFOT老化对橡胶粉 改性沥青官能团的影响比较明显.由于橡胶粉脱硫过程中已引入较多带基或羧基的极性基团，脱硫橡胶粉改性 沥青在老化前后红外图谱中的羰基吸收峰差异很小，其抗老化性能也相对较好. [关键词]公路工程：橡胶粉；改性沥青；老化性能；研究 [中图分类号]U414 [文献标识码]A [文章编号]1002-8498(2017)11-0053-04 Study on the Aging Performance of Crumb Rubber Modified Asphalt LIU Yanjun.2 YE Zhigang' ZHANG Yuzhen' (1.College of Chemical Engineering China University of Petroleum Qingdao Shandong 266580 China; 2.CNOOC Oil Petrochemicals Co.Ld.Beijing 100029 China) Abstract:Three kinds of aging experimental methods are used to simulate the aging process of crumb rubber modified asphalt.The different performance of three kinds of erumb rubber modified asphalt on aging behavior was evaluated in different conditions and the influence of aging process on molecular structure was analyzed by IR.The results show that the soft point will be enhanced and the penetration will be decreased associated with aging process of crumb rubber modified asphalt.For different kinds of erumb rubber modified asphalt the aging rule is similar and the performance is different after aging. Infrared spectra analysis showed that the change of molecular structure of crumb rubber modified asphalt a...