Sound insulation with three-layer thin concrete structures with integrated frame

In a modern high rise residential buildings walls between apartments do not have the necessary soundproofing Rw=23 dB. The reason for this is the use as material for the walls of the lightweight concrete or gypsum blocks. The use of materials with higher density or greater thickness is limited load-bearing capacity of floors and saving living space. To solve this problem developed a three-layer walls consisting of outer layers composed of E or TT shaped concrete blocks, the rotated ribs to each other. Their inner layer is made of sound-absorbing material – mineral wool mats, expanded clay sand. It is experimentally found that the thickness of such structures 160...200 mm provided by sound insulation of structures in 52...53 dB. The article contains the results of research of influence on the sound insulation of three-layered walls such the density of the concrete, the material of the inner layer, and other factors.