废旧胶粉目数和反应温度对橡胶沥青基本性能的影响研究  

Research on the Influences of Mesh Number of Rubber Powder and Temperature on the Performance Properties of the Rubber Asphalt

作　　者：谢邦柱[1,2] 杜素军 蔡丽娜[1,2] 穆建青 王慧[1,2] XIE Bang-zhu;DU Su-jun;CAI Li-na;MU Jian-qing;WANG Hui(Shanxi Transportation Research Institute,Taiyuan 030006,China;National and Local Joint Engineering Laboratory of New Materials in Road,Taiyuan 030006,China)

机构地区：[1]山西省交通科学研究院,太原市030006 [2]新型道路材料国家地方联合工程实验室,太原市030006

出　　处：《北方交通》2018年第9期44-48,共5页Northern Communications

基　　金：山西省科研咨询项目(15-304-23-5);山西省交通厅建设科技项目(16-2-06);山西省交通厅建设科技项目(15-2-09)

摘　　要：主要研究了废旧胶粉改性沥青制备过程中,外掺胶粉目数、反应温度对橡胶沥青基本性能的影响。从胶粉与沥青的作用机理出发,着重分析了胶粉目数、反应温度等因素对胶粉改性沥青软化点、针入度、5℃延度、弹性恢复及180℃黏度等基本性能指标变化规律的影响。试验研究表明:当外掺胶粉的目数为40目、反应温度为195℃时,废旧胶粉改性沥青的高温性能(软化点、180℃黏度)、低温性能(5℃延度)及弹性恢复等最好。胶粉目数能显著影响初期混溶过程中胶粉在沥青中的分散程度,在后期的反应过程中,反应温度则是胶粉溶胀、脱硫降解作用的关键影响因素。In this study,the influences of mesh number of rubber powder and reaction temperature on the performance properties of rubber asphalt were mainly demonstrated. Based on the mechanisms between the rubber powder and matrix asphalt,the variations of performance properties（ softening point,penetration,5℃ ductility,elastic recovery and 180℃ viscosity. etc） influenced by mesh number and temperature were analysized as well. In conclusion,40 mesh rubber powder and 195℃ contribute to a better high temperature performances,decent low temperature properties and elastic recovery of rubber asphalt. The disperse degree of rubber powder in the matrix asphalt is significantly influenced by the mesh number of rubber powder. The reaction temperature has definite impact on swelling and desulphurization and degradation of rubber powder.

关 键 词：橡胶沥青 胶粉目数 反应温度 基本性能 作用机理 

分 类 号：U414.75[交通运输工程—道路与铁道工程]