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| High temperature performance of chemical modified asphalt based on repeated creep and recovery test |
| School of Highway, Chang′an University, Xi′an, Shaanxi 710064, China |
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Abstract In order to explore the high temperature rheological properties of PPA and RET modified asphalt binders, the viscoelastic response law of base asphalt, PPA modified asphalt, RET modified asphalt and SBS modified asphalt under different load stresses and temperatures were investigated based on the repeated creep and recovery test. The delayed elastic behaviors of asphalt binders were analyzed from temperature and stress. The properties of PPA and RET asphalt binders were compared with those of SBS modified asphalt binder to objectively evaluate the high temperature performance of the two kinds of chemical modified asphalt binders. The Burgers model was adopted to fit the experimental data. The relevant relationship between viscous composition in creep stiffness and dynamic stability of asphalt mixture was analyzed. The results show that the addition of PPA and RET can significantly improve the deformation resistance of asphalt at high temperature to enhance the anti-rutting performance of asphalt pavement.
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Received: 08 September 2016
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2017, Vol. 38 
