多聚磷酸/脱硫胶粉复合改性沥青的制备及性能研究  

Preparation and Performance Study of Asphalt Modified by Polyphosphoric Acid/Desulfurized Crumb Rubber

作　　者：袁剑波[1] 殷婵 冯新军[1] 余帆 YUAN Jianbo;YIN Chan;FENG Xinjun;YU Fan(School of Transportation,Changsha University of Science&Technology,Changsha,Hunan 410114,China)

机构地区：[1]长沙理工大学交通学院,湖南长沙410114

出　　处：《中外公路》2025年第2期90-98,共9页Journal of China & Foreign Highway

基　　金：湖南省交通运输厅科技进步与创新项目(编号:202039)。

摘　　要：为了提升脱硫橡胶沥青的综合性能,该文采用脱硫胶粉复合多聚磷酸改性的方式,基于响应曲面法优化复合改性沥青的制备参数,并制备普通橡胶、脱硫橡胶、多聚磷酸/普通橡胶复合和多聚磷酸/脱硫橡胶复合4种改性沥青,比较并分析它们各方面的性能。结果表明:相较于普通橡胶沥青,脱硫橡胶复合改性沥青的黏度更低,拌和、压实温度也有明显降低,体系中胶粉与沥青的相容更为稳定,便于橡胶沥青的制备、储存运输以及施工过程。而在路用性能方面,多聚磷酸/脱硫胶粉复合改性沥青的高温抗变形能力表现出与普通橡胶沥青相接近的水平,并且在低温环境下的蠕变能力更加优秀。在4种改性沥青中,多聚磷酸/脱硫胶粉复合改性沥青的性能优势明显,更适合推广应用。To improve the comprehensive performance of desulfurized rubber asphalt,the asphalt was modified by using desulfurized crumb rubber and polyphosphoric acid.Based on the response surface method,the preparation parameters of the composite modified asphalt were optimized.In addition,four types of modified asphalt were prepared by using ordinary rubber,desulfurized rubber,composite polyphosphoric acid/ordinary rubber,and composite polyphosphoric acid/desulfurized crumb rubber.Their performance was compared.The results show that compared with ordinary rubber asphalt,the asphalt modified by desulfurized rubber has lower viscosity,significantly lower mixing and compaction temperatures,and more stable compatibility between rubber powder and asphalt in the system,which facilitates the preparation,storage,transportation,and construction process of rubber asphalt.In terms of road performance,the high-temperature deformation resistance of asphalt modified by polyphosphoric acid/desulfurized crumb rubber shows a level similar to that of ordinary rubber asphalt,and its creep ability is more excellent in low-temperature environments.Among the four types of modified asphalt,the asphalt modified by polyphosphoric acid/desulfurized crumb rubber has more obvious performance advantages and is suitable for promotion and application.

关 键 词：脱硫胶粉 多聚磷酸 响应曲面法 黏温曲线 储存稳定性 流变性能 

分 类 号：U414[交通运输工程—道路与铁道工程]