有机蒙脱土/废胶粉复合改性沥青的性能  

Properties of Organic Montmorillonite/Crumb Rubber Compound Modified Asphalt

作　　者：肖新颜[1] 杨泽清[1] 

机构地区：[1]华南理工大学化学与化工学院,广东广州510640

出　　处：《华南理工大学学报（自然科学版）》2013年第6期116-120,共5页Journal of South China University of Technology(Natural Science Edition)

基　　金：石油化工联合基金资助项目(U1162120)

摘　　要：采用熔融共混法制备了有机蒙脱土(OMMT)/废胶粉复合改性沥青,通过X射线衍射(XRD)分析和原子力显微镜(AFM)分析表征了复合改性沥青的微观结构,研究了复合改性沥青的物理性能、抗热氧老化性能和热储存稳定性.结果表明:OMMT的掺入使废胶粉在沥青中的分散更加均匀,OMMT/废胶粉复合改性沥青形成剥离结构;与废胶粉改性沥青相比,OMMT/废胶粉复合改性沥青的高温性能得到改善,随着OMMT掺量的增加,软化点大幅升高,25℃针入度及5℃延度减小;与废胶粉改性沥青相比,OMMT/废胶粉复合改性沥青的抗热氧老化性能和热储存稳定性明显提高.Organic montmorillonite（OMMT） / crumb rubber compound modified asphalt was prepared via melt blending,and the microstructure of the product was characterized and analyzed by means of XRD and AFM.Moreover,the physical properties,thermal oxidative aging properties and thermal storage stability of the product were investigated.The results show that（1） the dispersion of crumb rubber in the modified asphalt becomes more uniform and an exfoliated structure forms due to the doping of OMMT;（2） as compared with the crumb rubber modified asphalt,OMMT / crumb rubber compound modified asphalt is of improved high-temperature performances,for instance,with the increase of OMMT dosage,the softening point sharply increases,and the penetration（25 ℃） and the ductility（5 ℃） both decrease;and（3） after the doping of OMMT,both the thermal oxidative aging properties and the thermal storage stability of the compound modified asphalt improve significantly.

关 键 词：有机蒙脱土 废胶粉 沥青 抗热氧老化性能 热储存稳定性 

分 类 号：TU535[建筑科学—建筑技术科学]