中国塑料2024，Vol.38Issue(8)：94-99,6.DOI:10.19491/j.issn.1001-9278.2024.08.015
BMH型温拌剂对废塑/SBS复合改性沥青疲劳性能的影响
Effect of BMH type warm mixture on fatigue properties of waste plastic/SBS composite modified asphalt
摘要
Abstract
In this paper,the fatigue resistance of waste plastic/butadiene styrene block polymer(SBS)composite modified as-phalt was analyzed by temperature scanning test,time scan test,linear amplitude scanning test and infrared test using a dy-namic shear rheometer.The results indicated that BMH warm mixture could reduce the fatigue factor,reduce the dissipation energy,and improve the fatigue resistance of waste plastic/SBS modified asphalt,and the best performance was at a content of 1.2 wt%.Both normalized dynamic modulus decays to an index value of 50%of the initial modulus and stiffness ratio(S)×times of cyclic loading(N)can be used to characterize the fatigue life of warm-mix waste plastic/SBS composite modi-fied asphalt,and the fatigue life characterized by S×N index was generally lower than that of Nf50,the fatigue resistance im-proved by 1.2 wt%content was the best,and the improvement effect of 1.4 wt%content did not increase but decreased.BMH warm mix had a more obvious effect on the fatigue performance of aging asphalt samples.Regardless of whether it is an aged asphalt sample or an unaged asphalt sample,the improvement effect of warm mix was more prominent in the envi-ronment with high strain level.The fatigue resistance of 1.2 wt%BMH mixture sample was the best.BMH warm mix could improve the fatigue resistance of asphalt by reducing the content of carbonyl and sulfoxide groups,and the effect on the aging asphalt was more obvious,which was consistent with the test results of linear amplitude scanning.关键词
废塑/热塑性丁苯橡胶复合改性沥青/温拌技术/时间扫描/线性振幅扫描/疲劳性能Key words
waste plastic/butadiene styrene block polymer composite modified asphalt/warm mix technology/time scanning/linear amplitude scanning/fatigue performance分类
化学化工引用本文复制引用
徐传浩,石振武,池波..BMH型温拌剂对废塑/SBS复合改性沥青疲劳性能的影响[J].中国塑料,2024,38(8):94-99,6.基金项目
龙建路桥股份有限公司科技项目(230000100004258220004) （230000100004258220004）
