Study on Compatibility and Rheological Properties of High-Viscosity Modified Asphalt Prepared from Low-Grade Asphalt

Materials

Ruigang Xu¹  Dongwei Cao²  Feng Zeng³  Mingliang Li⁴  Jun Li⁵ 

[1] Bridge Corportation, Andingmenwai Street, No. 88, Beijing 100011, China;China Railway Third Bureau Group Co., Ltd. Survey and Design Branch, Jinsong Road, No. 16, Yingze District, Taiyuan 030001, Shanxi Province, China;;China Road &Road Engineering Research Center, Research Institute of Highway Ministry of Transport, Xitucheng Road, No. 8, Haidian District, Beijing 100088, China;Zhonglugaoke (Beijing) Road Technology Co. Ltd., Xitucheng Road, No. 8, Beijing 100088, China;

关键词: high-viscosity modified asphalt;    low grade asphalt;    porous asphalt;    rheological property;    viscosity-temperature characteristic;   

DOI  :  10.3390/ma12223776

来源: DOAJ

【 摘 要 】

High-viscosity modified asphalt is mainly used as a binder for porous asphalt in China and Japan. In order to meet the demand for using porous asphalt under high temperature condition in Africa, high-viscosity asphalt made from low-grade matrix asphalt, which is commonly used in Africa is investigated. Based on simulation of local climate in Africa, the suitable range of high viscosity additive content for different matrix asphalt was obtained by analyzing dynamic viscosity of the asphalt. Through PG high temperature grading, multi-stress repeated creep, accelerated fatigue, temperature sweep and other tests, changes of high temperature, anti-fatigue and anti-shear indicators before and after modification were compared and analyzed and effects of different matrix asphalt were also studied. Finally, considering engineering requirements, mixing and compaction temperatures of various high-viscosity modified asphalt were determined through study of viscosity-temperature characteristics. This research provides a support for preparation of high-viscosity modified asphalt and porous asphalt mixture by using low grade asphalt. The research achievements can help to guide the material design and application of porous asphalt in Africa and other high temperature areas.

【 授权许可】

Unknown