南通大学学报（自然科学版）

为提高道路、隧道用材料的吸声性能,降低交通噪声,以普通硅酸盐水泥、膨胀珍珠岩为主要原料,制备出水泥基膨胀珍珠岩多孔材料,将其分别与金属穿孔板、活性炭纤维(ACF)非织造织物结合,利用组合位置、背后空腔深度、ACF非织造织物层数的变化组成不同复合结构的吸声材料,并对其吸声性能进行研究.结果表明:将金属穿孔板以及ACF非织造织物分别置于水泥基膨胀珍珠岩材料前方,增加ACF非织造织物层数,均可提高复合结构材料的吸声性能;而金属穿孔板/水泥基膨胀珍珠岩以及ACF/水泥基膨胀珍珠岩的背后空腔对复合结构材料的吸声性能均无明显影响.

To improve the sound-absorbing property of materials used for road and tunnel, and reduce the traffic noise, porous cement-based expanded perlite material were prepared with ordinary portland cement and expanded perlite used as raw materials. Then they were combined with perforated metal plate or activated carbon fiber(ACF)non-woven fabrics respectively, by changing the relative position, depths of cavity behind the combined structure,layer of ACF non-woven fabrics, the combined sound-absorbing material were prepared and their sound-absorbing property were studied. Results show that the sound-absorbing property of the combined sound-absorbing material are improved by setting perforated metal plate or ACF non-woven fabric ahead of porous cement-based expanded perlite material, or by increasing the layer of ACF non-woven fabrics. However, the sound-absorbing property of the combined sound-absorbing material are nearly unifluenced by the depths of cavity behind the combined structure.