Preparation and Performance Analysis of Foam-concrete Sound Absorbing Material Prepared Purely from Solid Wastes

To control the pollution of industrial solid wastes and noises, this paper prepares foamconcrete sound absorbing materials purely from solid wastes like steel slag (SS), blast furnace slag (BFS) and desulfurized gypsum (DG) , and experimentally explores the effects of fiber content and aluminum powder content on the compressive strength and sound absorption of the foam-concrete prepared jointly by physical and chemical foaming.The results show that the addition of a proper amount of fibers can effectively enhance the compressive strength and high-frequency sound absorption of the material; when the aluminum powder content is 1 %, the physical-chemical combined foaming can produce a sound absorbing material with a high sound absorption coefficient at both medium and high frequencies, and the mean sound absorption coefficient can reach 0.457.