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Performance of modified asphalt mixture with coal liquefaction residue

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Document pages: 11 pages

Abstract: The purpose of this paper is to modify asphalt binder and mixture with direct coal liquefaction residue (dlcr), and evaluate the performance of modified asphalt mixture. The dynamic modulus and phase angle of dclr and dclr composite modified asphalt mixture are analyzed, and compared with the viscoelasticity of sk-90 and SBS modified asphalt mixture. The master curve of asphalt mixture is displayed, and the dynamic and viscoelastic behavior of asphalt mixture is described by Christensen Anderson marasteanu (CAM) model. The test results show that the dynamic modulus of dclr and dclr composite asphalt mixture is higher than that of sk-90 and SBS modified asphalt mixturetures. Based on the viscoelastic parameters of CAM models of the asphalt mixtures, the high- and low-temperature performance of DLCR and DCLR-composite modified asphalt mixtures are obviously better than the SK-90 and SBS modified asphalt mixtures. In addition, the DCLR and DCLR-composite modified asphalt mixtures are more insensitive to the frequency compared to SK-90 and SBS modified asphalt mixtures.

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