Abstract
Hot mix epoxy asphalt (HMEA) binders have been widely used on the pavement of orthotropic steel bridge decks. In present paper, rotational viscosity, glass transition temperature, damping properties, mechanical properties, and morphology of HMEA were investigated using Brookfield rotational viscometer, differential scanning calorimetry, dynamic mechanical analysis (DMA), universal material tester, laser scanning confocal microscopy. Furthermore, the high temperature deformation resistance, rutting resistance, and fatigue cracking resistance of HMEA concretes (HMEACs) were evaluated using Marshall, wheel tracking, and three-point bending tests. Results show that the addition of asphalts postpones the cure reaction of epoxy resin. The rotational viscosity of HMEA binder keeps low enough to meet the demands of asphalt mixture mixing and paving at 160 °C. DMA results show that HMEA exhibits excellent damping properties. The addition of asphalts lowers the tensile strength and modulus of epoxy resin. However, the elongation at break of HMEA increases with the increase of asphalt contents. HMEACs exhibit good resistance to high temperature deformation, rutting, and fatigue cracking performances. All these results show that HMEA binder exhibits excellent performance in the steel bridge pavement.
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