Abstract:In order to study the influence of high viscosity asphalt binders on the permeable mixture,design and grading optimization of PAC-13 mixture were carried out through the use of TPS, HVA and finished high viscosity modified asphalt. The optimum oil-stone ratio was determined through leakage and scattering test, and the road performance was analyzed. The amount of fiber used in the test was 0.3% of the total amount of the mixture, and the pavement performance of the mixture without fiber was compared and analyzed. The research results show that the grading combination of 10 mm<particle size≤15 mm,5 mm<particle size≤10 mm,0<particle size≤5 mm and mineral powder of the three mixtures all is 57%∶30%∶10%∶3% determined by the technical indicators such as voidage and connected void fraction. Considering economic cost, it is recommended to choose the grading combination. The high temperature stability, low temperature performance and permeability of the mixture can be ameliorated by adding fiber. The comprehensive performance of the three mixtures is sorted into finished high viscosity modified asphalt mixture > TPS high viscosity modified asphalt mixture > HVA high viscosity modified asphalt mixture. The performance of the mixture can be improved significantly through replacing 2% of the mineral powder with identical amount of cement. Using HVA high viscosity modified asphalt in the design and construction of PAC-13 surface layer mixture could provide a certain reference for the construction of permeable pavement.