基于响应面法的高黏度复合改性沥青中丁苯橡胶/苯乙烯-丁二烯-苯乙烯嵌段共聚物/胶粉的最优掺量  

Optimum content of styrene-butadiene rubber/styrene-butadiene-styrene block copolymer/rubber powder in high viscosity composite modified asphalt based on Box-Behnken method

作　　者：孙吉书 冯德瑜 宋莹 肖田 SUN Ji-shu;FENG De-yu;SONG Ying;XIAO Tian(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;China Railway 14th Bureau Group Co Ltd,Taian 271000,China;Tianjin Municipal Engineering Design&Research Institute,Tianjin 300051,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中铁十四局集团有限公司,山东泰安271000 [3]天津市政工程设计研究总院有限公司,天津300051

出　　处：《合成橡胶工业》2023年第1期39-44,共6页China Synthetic Rubber Industry

基　　金：天津市交通运输科技发展计划项目(2022-18)。

摘　　要：采用响应面(Box-Behnken)法,以丁苯橡胶(SBR)、苯乙烯-丁二烯-苯乙烯嵌段共聚物(SBS)和胶粉各自的掺量作为影响因素,以沥青的三大技术指标、60℃动力黏度及170℃布氏黏度为评价指标建立各自的响应面模型,探讨三种添加剂掺量对沥青技术指标的影响规律,并优选出高黏度复合改性沥青中SBR、SBS和胶粉的最佳掺量。结果表明,分别以质量分数5%、5%和15%的SBS、SBR和胶粉复合而成的高黏度复合改性沥青性能最好,其针入度为4.63 mm,延度为364 mm,软化点为86.5℃,60℃动力黏度为78158 Pa·s,170℃布氏黏度为2.72 Pa·s,各项指标均高于标准要求。Response surface(Box-Behnken)method was used to establish respective response surface models with the contents of styrene-buta-diene rubber(SBR),styrene-butadiene-styrene block copolymer(SBS)and rubber powder as the influen-cing factors,and the three technical indexes of asphalt,dynamic viscosity 60℃and Brinell viscosity at 170℃as evaluation indexes.The effects of contents of three additives on technical indexes of the asphalt were discussed,and the optimum contents of SBR,SBS and rubber powder in high viscosity composite modified asphalt were selected.The results showed that the high viscosity composite modified asphalt with mass fraction of SBS of 5%,SBR of 5%and rubber powder of 15%respectively had the best performance,its penetration was 4.63 mm,ductility was 364 mm,softening point was 86.5℃,dynamic viscosity at 60℃was 78158 Pa·s,and Brinell viscosity at 170℃was 2.72 Pa·s.All the indexes were higher than the standard requirements.

关 键 词：高黏度复合改性沥青 响应面法 排水沥青路面 道路工程 丁苯橡胶 

分 类 号：U414[交通运输工程—道路与铁道工程]