High Temperature Rheological Properties of PPA/SBS Composite Modified Asphalt
LI Chao1, 2, CUI Shichao1, 2, WANG Lan1, 2, BAI Xuefeng1, 2
1 School of Civil Engineering, Inner Mongolia University of Technology, Huhhot 010051, China 2 Inner Mongolia Autonomous Region Key Laboratory of Civil Engineering Structure and Mechanics, Huhhot 010051, China
Abstract: In order to study the high temperature rheological properties of polyphosphoric acid (PPA)/SBS composite modified asphalt, dynamic shear rheometer (DSR) was used to test four kinds of composite modified asphalt and SBS modified asphalt with different dosage of PPA by repeated creep recovery test (RCRT). The results show that: the deformation recovery capacity of PPA/SBS composite modified asphalt is not affected by the number of loading cycles and stress level, but is affected by temperature, and the viscous flow deformation mainly occurs in the creep stage, and the viscous deformation cannot be restored after unloading. The cumulative strain of PPA/SBS composite modified asphalt increases significantly with the increase of temperature, stress level and load action times, especially the temperature and stress level have a great influence on the cumulative strain of modified asphalt. Under the condition of the same temperature and stress level, the adhesive part Gv value of creep stiffness of composite modified asphalt with PPA 1%+SBS 3% is the largest and has the best high temperature deformation resistance.
李超, 崔世超, 王岚, 白雪峰. 多聚磷酸/SBS复合改性沥青的高温流变特性[J]. 材料导报, 2020, 34(14): 14057-14062.
LI Chao, CUI Shichao, WANG Lan, BAI Xuefeng. High Temperature Rheological Properties of PPA/SBS Composite Modified Asphalt. Materials Reports, 2020, 34(14): 14057-14062.
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2020, Vol. 34 
