Research and Application on the Crumb Rubber Modified Low-Noise Asphalt Pavement

In this paper, the research of Low-Noise Asphalt Pavement (LNAP) mix design with the crumb rubber has been studied, including materials selection, gradation selection, asphalt content selection, performance tests, and so on. To verify the high-temperature performance and the effect of noise reducing, the new test methods are studied in the lab. The On-board Sound Intensity (OBSI) is developed to measure the tire-pavement noise and evaluate the noise reducing effect of trial pavement. The QC and QA of LNAP is researched by the trial pavement and the tire-pavement noise is measured by the OBSI, the LNAP has not only the good performance but also low noise than the conventional asphalt pavement.