橡胶颗粒沥青混合料吸声降噪特性的研究

RESEARCH ON NOISE REDUCTION BY SOUND ABSORPTION'CHARACTERISTIC OF RUBBER PARTICLE BITUMINOUS MIXTURE

本文通过试验研究了不同条件下橡胶颗粒沥青混合料吸声降噪特性。研究结果表明:在沥青混合料中添加橡胶颗粒可以有效吸收交通噪声。混合料的吸声降噪能力主要受橡胶颗粒掺量与级配类型影响,而橡胶颗粒的粒径、集料的最大粒径和沥青种类影响较小。橡胶颗粒掺量在一定范围内时,其与混合料最大平均吸声系数之间具有良好的线性关系。

In this paper,noise reduction by sound absorption＇characteristic of rubber particle bituminous mixture was studied by different experimentations.The results showed that： It＇s efficient to rubber particle applied to bituminous mixture for absorb in traffic noise.The mixture capability of noise reduction by sound absorption was mainly effected by rubber particle＇s mixed quantum and gradation types,was less impacted by rubber particle＇s grain size aggregate＇s maximal grain size and asphalt types.To a certainty range,rubber particle＇s mixed quantum had nicer linear relation with most average absorption coefficient of mixture.