Influence of Rubber Powder Content on High-Temperature Performance of TOR Rubber Asphalt

Abstract:

Six kinds of TOR rubber asphalts with 5%-30% rubber powder contents of were selected to carry out conventional high-temperature tests and dynamic shear rheological tests to obtain some parameters reflecting the high-temperature performance of asphalt binders, such as softening point, dynamic viscosity at 60°C, rutting factor (G^*/sinδ) at 60°C and critical temperature of rutting factor (T_G*/sinδ). The results show that the changing tendency of two rheological parameters of TOR rubber asphalts, G^*/sinδ at 60°C and T_G*/sinδ, is ascend in first and descend at last with the increase of rubber powder content proportion. The high-temperature performance of TOR rubber asphalt with the rubber powder content about 20% is the best. Softening point and dynamic viscosity at 60°C, as two conventional high-temperature parameters of asphalt binders, can describe the high-temperature performance of TOR rubber asphalt with the rubber powder content below 20%, but cannot evaluate accurately the high-temperature performance of TOR rubber asphalt with the rubber powder content above 20%, because TOR rubber asphalt has formed a network structure at this moment.

• Periodical: Applied Mechanics and Materials (Volumes 405-408)
• Pages: 1753-1756
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.405-408.1753
• Online since: September 2013
• Authors: Yong Mei Guo, Wei Chen
• Keywords: Dynamic Shear Rheological Test, High-Temperature Performance, Rubber Powder Content, TOR Rubber Asphalt

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