DCLR Modifi ed Petroleum Asphalt Optimization and Mixture Road Performance

Source:
By:帆 一 储

DOI: https://doi.org/10.30564/frae.v5i1.5196

Abstract:

In recent decades, modifi ed asphalt materials have been used in enhancing the traffi c load on the roads. The main objective of this paper is to explore the modifi cation eff ect of direct coal liquefaction residue (DCLR) on as- phalt binders and investigate the eff ectiveness of DCLR in improving the performance of asphalt road. This paper prepared modifi ed petroleum as-
phalt under diff erent process conditions and tested its penetration, softening point and ductility index. Based on the experimental data, according to gray correlation degree, the performance for the asphalt was compared. The performance for the modifi ed asphalt is simulated and predicted using poly-nomial functions. The modifi ed asphalt was analyzed by FT-IR, TGA, SEM and HPLC. The results show that the optimal process conditions for DCLR modifi ed asphalt are shear mixing time of 45 min, shear mixing tempera- ture of 150 °C and shear mixing rate of 4000 r/min. The predicted fi t with the experimental data of 0.993 further demonstrates the effectiveness of the method. The characterization results show no signifi cantchemical change between the DCLR and the asphalt. DCLR can signifi cantly improve the high temperature performance and water stability of the asphalt, but it has little impact on its low temperature performance.

References:

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