Hot Mixing Behavior and Curing Process of Epoxy Asphalt

Abstract

A new hot mixed epoxy asphalt system was developed. The reaction process of epoxy resin was characterized by Fourier transform infrared spectroscopy (FTIR). The viscosity was investigated by Brinell viscometer when epoxy resin was mixed with asphalt. The glass transition temperature (T _g), homogeneity, thermal stability and viscoelasticity of epoxy asphalt were analyzed by differential scanning calorimetry (DSC), metallographic microscope, thermogravimetric (TG) and dynamic mechanical analysis (DMA). The results showed that the viscosity of epoxy resin modified asphalt reached 1 000 mPa·s for more than 180 minutes at 180 °C, while the best construction process is mixing at 180 °C for 2 hours and curing at 60 °C for 4 days. The particle size of asphalt is less than 50 µm. In addition, the mechanical properties of the materials are uniform within the specified pavement thickness.

Keywords

epoxy asphalt / FTIR / curing process / viscosity / dispersed

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