摘要
为分析高模量沥青混合料在寒冷地区的应用,将聚烯烃类高模量剂分别掺入90#基质沥青和苯乙烯-丁二烯-苯乙烯(Styrene-Butadiene-Styrene,SBS)改性沥青,制备高模量改性沥青混合料AC-10-SBS(H)、AC-20-90#(H)、AC-20-SBS(H),分析掺加高模量剂对沥青混合料路用性能的影响。结果表明:掺加高模量剂可有效提高AC-20级配90#基质沥青和SBS改性沥青混合料的路用性能,高模量90#基质沥青混合料低温性能下降,高模量SBS改性沥青混合料低温性能提高并满足规范要求,且汉堡车辙深度、动态模量、冻融强度劈裂比、疲劳寿命最优;AC-10-SBS(H)的低温性能、水稳定性和疲劳寿命优于AC-20-SBS(H),AC-20-SBS(H)的高温稳定性优于AC-10-SBS(H);试验温度为15℃,加载占比为10 Hz时,AC-20-SBS(H)、AC-10-SBS(H)的动态模量相近。建议寒冷地区AC-10型、AC-20型高模量沥青混合料采用聚烯烃类高模量剂-SBS改性沥青组合方式。
To analyze the application of high modulus asphalt mixtures in cold regions,polyolefin-based high-modulus agents are separately added to 90#matrix asphalt and Styrene-Butadiene-Styrene(SBS)modified asphalt to prepare high modulus modified asphalt mixtures AC-10-SBS(H),AC-20-90#(H),and AC-20-SBS(H).The impact of adding high modulus agents on the road performance of asphalt mixtures is analyzed.The results indicate that:The addition of high modulus agents can effectively enhance the road performance of AC-20 graded 90#matrix asphalt and SBS modified asphalt mixtures;the low-temperature performance of high modulus 90#matrix asphalt mixtures decreases,while the low-temperature performance of high-modulus SBS modified asphalt mixtures improves and meets regulatory requirements,with optimal values for Hamburg rut depth,dynamic modulus,freeze-thaw strength splitting ratio,and fatigue life.The low-temperature performance,water stability,and fatigue life of AC-10-SBS(H)are superior to those of AC-20-SBS(H),while the high-temperature stability of AC-20-SBS(H)is better than that of AC-10-SBS(H);at a temperature of 15℃and a loading frequency of 10 Hz,the dynamic modulus of AC-20 and AC-10 high modulus modified asphalt mixtures are similar.It is recommended that in cold regions,AC-10 and AC-20 high modulus asphalt mixtures adopt a combination of high-modulus agent and SBS modified asphalt.
作者
王昊
韦金城
张东晓
安平
狄恩州
WANG Hao;WEI Jincheng;ZHANG Dongxiao;AN Ping;DI Enzhou(School of Transportation Engineering,Shandong Jianzhu University,Jinan 250101,China;Science and Technology Innovation Center,Shandong Transportation Research Institute,Jinan 250102,China;Shandong Transportation Construction Group Co.,Ltd.,Rizhao 276801,China)
出处
《山东交通学院学报》
2025年第2期86-92,109,共8页
Journal of Shandong Jiaotong University
