Modification mechanism of high modulus asphalt binders and mixtures performance evaluation

摘要: Abstract To observe the micro-morphology of high modulus asphalt binders (HMABs), a scanning electron microscope (SEM) and fluorescence were employed. evaluate performance characteristics mixtures using these binders, laboratory mixture tests conducted. The binder morphology showed that particle size modifiers, PR PLAST S® (PRS) Module® (PRM), relative viscosity modified increased with time; PRS modifier droplets tended to form network. test results indicated compared original styrene–butadiene–styrene (SBS) mixture, HMABs significantly improved temperature performance, water stability, moisture–heat synthesis property, dynamic mixtures. investigation sections average rut depth surface deflection observed in concretes (HMACs) much smaller than those SBS after one year service. Based on colloidal system equilibrium lowest energy principle, modification mechanism by PRM was analyzed this paper effects swelling interface layer. HMACs evaluated. confirmed correctness analysis associated mechanism.