Noise reduction performance of exposed-aggregate cement concrete pavement

In the indoor pavement noise test, the paper used tyre-dropping method, adjusted different particle diameters and different gradations to obtain the cement concrete slabs of different texture depthes and surface characteristics, analyzed the correlation between the pavement texture and the pavement noise on the cement concrete slabs of different surface characteristics. Analysis results indicate that there is quadratic regression correlation between the pavement texture depth and the pavement noise, the texture of exposed-aggregate cement concrete pavement (EACCP) makes the sound level of above 1.25 kHz frequency be reduced apparently, and it has the tendency that the higher the noise frequency is, the larger its decrease degree is, when its frequency is 1.6 kHz, the pavement noise level of smooth cement concrete slabs is 87 dB (A), but the pavement noise of exposed-aggregate cement concrete slabs is (80 dB (A), ) it is reduced by (7 dB (A).) So proper EACCP can reduce pavement noise greatly, is a prosperous pavement in environmental protection.