Research on Material Composition and Performance of Porous Asphalt Pavement

With many advantages such as high skid resistance, low noise, and less splash and spray, porous asphalt pavement can significantly improve driving quality in wet weather condition and is used widely in Europe, the United States, and Japan. The early research in China on porous asphalt pavement was started in the 1980s. Due to the hot weather, overloaded traffic and poor material properties, the porous asphalt pavement paved in that time is not quite successful. This paper deals with the present research, especially the material composition and its impacts on the performance of porous asphalt pavement. In this study, the empirical equation of air void versus gradation was derived from uniform experimental analysis so that the target gradation could be achieved by using the formula. In addition, the quantitative relationship between air void and drainage efficiency is obtained by a series of experimental studies, and the performances of porous asphalt mixture with three types of bitumen are evaluated to analyze the influence of asphalt property on that of the asphalt mixture. Finally, the binder requirement of porous asphalt for China's weather and traffic condition is proposed.