Abstract
Optimization on Porous Asphalt Pavement is based on noise reduction capacity. The influence factors of sound absorption properties of porous asphalt mixture were studied by using standing wave ratio method.The results indicate that: The peak absorption coefficient of porous asphalt mixture increases with the increase of porosity and the peaks are concentrated in the frequency range from 800Hz to 1000 Hz. The peak moves to high frequency as the porosity increase. It is better to use smaller nominal maximum aggregate size to reduce the noise level. With the pavement thickness increases, the average absorption coefficient of porous pavement in the high frequency band will decreases. The recommended thickness of Porous Asphalt Pavement range is 40-60mm.
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