摘要
Abstract
To enhance the noise resistance performance of asphalt pavement structures,based on a comprehensive upgrading and renovation project of a municipal road in Wuhan,Hubei Province,the influence of maximum particle size,asphalt viscosity and void ratio on the sound absorption coefficient of asphalt mixture was deeply analyzed by the reverberation chamber method.The optimal low-noise asphalt mixture ratio was determined,and its application effect was evaluated.The results show that both the viscosity of asphalt and the void ratio of asphalt mixture have a linear relationship with the sound absorption coefficient.The optimal gradation is determined to be AC8,the optimal asphalt is 90#base asphalt+24％rubber powder,and the optimal void ratio is 14.06％.Practical experience shows that the average sound intensity of the left and right amplitters of the common asphalt pavement structure is 60.75 dB,which is 8.9％higher than that of the low-noise asphalt pavement structure.This indicates that the designed low-noise asphalt pavement structure has excellent noise resistance performance.关键词
市政道路/低噪声沥青混合料/影响因素/声学特性Key words
Municipal roads/Low-noise asphalt mixture/Influencing factors/Acoustic characteristics分类
建筑与水利
