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通过室内成型直径为100mm的圆柱体试件,采用驻波管法测定其吸声系数,采用正交试验法分析了上、下层厚度和上、下层空隙率以及级配对双层降噪沥青混凝土路面降噪性能的影响,并对各种多空隙沥青混凝土路面的降噪性能进行了预估。
The sound absorption coefficient was measured by the standing wave tube method by using cylindrical specimens of 100mm in diameter. The thickness of the upper and lower layers, the porosity of the upper and lower layers and the influence of gradation on the double-derated asphalt concrete pavement Noise reduction performance, and a variety of porous asphalt concrete pavement noise reduction performance prediction.