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| Experiments on rheological properties of TOR asphalt rubber |
| 1.College of Civil Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225127, China; 2.Jiangsu Kejia Engineering Design CO., LTD., Wuxi, Jiangsu 214002, China) |
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Abstract In order to investigate rheological properties of TOR rubber asphalt, asphalts were determined by Brinell viscosity and dynamic shear rheometer (DSR) after film oven and pressure aging treatments. The preparation and test method of modified asphalt were proposed, and the influences of TOR on the asphalt rubber properties of complex modulus, phase angle, rut factor, viscosity and fatigue factor were analysed. The results show that the complex modulus is increased by adding TOR, but with decreased phase angle. TOR can promote the compatibility between waster rubber powder particles and asphalt with increased rutting resistance at high temperature. The rut factors of asphalt, asphalt rubber and TOR asphalt rubber are all increased after heat aging with increased viscositytemperature sensitivity. Compared with asphalt rubber, TOR asphalt rubber has better rutting resistance in actual process. The fatigue resistance of TOR asphalt rubber is improved and better than that of asphalt rubber at low temperature after pressure aging. The resistance abilities of TOR asphalt rubber to heat, oxygen and water are effectively improved after pressure aging with water.
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2012, Vol. 33 
