聚烯烃类高模量沥青混合料路用性能的试验研究

王昊¹，韦金城^1,2，张东晓³，安平³，狄恩州²

1.山东建筑大学交通工程学院，山东 济南  250101；2.山东省交通科学研究院科技创新中心，山东 济南  250102；

3.山东交工建设集团有限公司，山东日照276801

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。

关键词：SBS改性沥青；高模量沥青混合料；路用性能

Experimental study on the road performance of high modulus asphalt mixtures with polyolefin additives

WANG Hao¹, WEI Jincheng^1,2, ZHANG Dongxiao³, AN Ping³, DI Enzhou²

1.School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China;

2.Science and Technology Innovation Center, Shandong Transportation Research Institute, Jinan 250102, China;

3.Shandong Transportation Construction Group Co., Ltd., Rizhao 276801, China

Abstract: 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 rutdepth, 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.

Keywords: SBS modified asphalt; high modulus asphalt mixture; road performance