摘要: |
通过对基质沥青、聚氨酯(PU)、苯乙烯丁二烯苯乙烯嵌段共聚物(SBS)等原材料的优选和分析,采用共混复合改性技术研发了一种新型的SBS PU高黏高弹沥青.通过红外光谱(FTIR)、多应力蠕变恢复(MSCR)和动态剪切流变(DSR)试验,分析了SBS PU高黏高弹沥青的改性机理、高温流变性能和储存稳定性.同时结合灰色关联熵分析及沥青性能变化规律,确定了改性工艺关键参数.结果表明:SBS与PU复合改性可有效提高沥青的黏弹性能,使其达到高黏高弹特性;SBS PU复合改性过程兼具物理和化学改性;PU化学改性有助于SBS PU高黏高弹沥青获得优异的高温流变性能和储存稳定性.推荐工艺参数为:剪切温度170℃,剪切速率4000r/min,剪切时间50min,发育时间60min. |
关键词: 道路工程 高黏高弹沥青 复合改性 工艺参数 机理分析 性能分析 |
DOI:103969/j.issn.1007 9629202001015 |
分类号: |
基金项目:国家自然科学基金资助项目(51008031);交通运输部应用基础研究项目(2014319812151);陕西省交通科技项目(KY18 01) |
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Composition and Process Parameters of SBS PU Modified High Viscosity and High Elasticity Asphalt |
ZHANG Zhengqi1, TIAN Zhongnan1, HUANG Shuolei1, ZHAO Fuqiang2
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1.Key Laboratory for Special Area Highway Engineering of Ministry of Education, Changan University, Xian 710064, China;2.Shaanxi Provincial Highway Expressway Construction Group Co., Ltd., Xian 710009, China
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Abstract: |
The preparation of SBS PU high viscosity and elasticity asphalt material was carried out through the optimization of raw materials such as matrix asphalt, polyurethane(PU) and styrene butadiene styrene copolymer(SBS). |
Key words: road engineering high viscosity and elasticity asphalt composite modification process parameter mechanism analysis performance analysis |