高模量沥青混合料在长寿命沥青路面的路用性能

李兵

山东高速股份有限公司工程建设项目管理中心，山东 济南  250098

摘要：为研究高模量沥青混合料在长寿命沥青路面中的路用性能，将高沸点石油融入基质沥青中制备高模量沥青黏结剂（high modulus asphalt binder，HMAB），进行针入度、软化点、脆点和动态模量试验，对掺加HMAB制备的高模量沥青混合料（high modulus asphalt mixture，HMAM）进行动态模量、湿度敏感性、车辙试验和疲劳试验。结果表明：与普通沥青黏结剂相比，HMAB的刚度显著增大，但低温性能降低；在高温条件下，HMAM的动态模量比普通沥青混合料大，抗水破坏性能比普通沥青混合料增大约10%，抗永久变形能力显著优于普通沥青混合料，抗疲劳开裂能力优于普通沥青混合料。

关键词：HMAB；HMAM；长寿命沥青路面；动态模量

Pavement performance of high modulus asphalt mixture on long life asphalt pavement

LI Bing

Engineering Construction Project Management Center, Shandong Hi-Speed Holdings Co., Ltd.，Jinan 250098, China

Abstract: To investigate the road performance of high modulus asphalt mixtures(HMAM) in long-life pavement applications, high boiling point petroleum is incorporated into base asphalt to prepare high modulus asphalt binder(HMAB). Penetration, softening point, brittleness point, and dynamic modulus tests are conducted to evaluate HMAB′s hardness, high-temperature stability, low-temperature crack resistance, and dynamic load response characteristics, demonstrating its modulus enhancement and performance advantages over conventional binders. Furthermore, dynamic modulus, moisture susceptibility, rutting resistance, and fatigue tests are performed on HMAM to assess its structural stiffness, moisture resistance, high-temperature rutting resistance, and durability, confirming its suitability for long-life pavement compared to conventional mixtures. Results indicate that HMAB exhibits significantly higher stiffness than conventional asphalt while maintaining comparable low-temperature performance. Under high-temperature conditions, HMAM demonstrates a 50% higher dynamic modulus, approximately 10% improvement in moisture resistance, twice the resistance to permanent deformation, and 5~10 times greater fatigue cracking resistance compared to conventional mixtures.

Keywords: HMAB; HMAM; long life asphalt pavement; dynamic modulus