有机化蛭石/SBS复合改性沥青流变及抗老化性能研究  

Research on Rheological and Anti-Aging Properties of Organicized Vermiculite/SBS Composite Modified Asphalt

作　　者：张文帅 Zhang Wenshuai(School of Civil Engineering and Communication,North China University of Water Resources and Electric Power,Zhengzhou 450003,China)

机构地区：[1]华北水利水电大学土木与交通学院,河南郑州450003

出　　处：《山东化工》2023年第24期35-37,41,共4页Shandong Chemical Industry

摘　　要：为提高SBS改性沥青的高温稳定性和抗老化性能,选择层状硅酸盐的一种有机化蛭石(OEVMT)以不同的掺量制备OEVMT/SBS复合改性沥青。试验采用薄膜烘箱老化(TFOT)模拟制备、施工过程中的老化,采用压力老化(PAV)模拟服役过程中的老化。在不同的温度下进行动态剪切流变试验(DSR)和弯曲蠕变劲度试验(BBR),得到复数剪切模量、相位角、蠕变速率和劲度模量等流变指标,并分析老化前后流变指标的变化。结果表明OEVMT显著提高了SBS改性沥青的高温性能,减小了老化对沥青低温性能的不利影响,提高了SBS改性沥青的抗老化性能,综合分析掺量为3%时,改性效果最佳。In order to improve the high temperature stability and aging resistance of SBS-modified asphalt,an organicized vermiculite(OEVMT)of layered silicate was selected to prepare OEVMT/SBS composite modified asphalt at different contents.The test used a thin film oven test(TFOT)to simulate aging during preparation and construction,and the pressure aging vessel(PAV)test to simulate aging in service.Dynamic shear rheology(DSR)and bending beam rheometer(BBR)tests were carried out at different temperatures to obtain the rheological indexes such as complex shear modulus,phase angle,creep rate and strength modulus,and to analyze the changes in rheological indexes before and after aging.The results showed that OEVMT significantly improved the high-temperature performance of SBS-modified asphalt,reduced the adverse effects of aging on the low-temperature performance of asphalt,and improved the anti-aging performance of asphalt,and the comprehensive modification effect is the best when the content is 3%.

关 键 词：SBS改性沥青 有机蛭石 流变性能 热氧老化 

分 类 号：TQ522.65[化学工程—煤化学工程]