Noise protection wall with noise absorbing layers - has primary and secondary noise absorbing layers on concrete plate

摘要

The protection wall used for preventing entry of noise is used especially in industrial plant, airfields, railways and on roads. The wall plates consist of load bearing, noise absorbing reinforced concrete plates providing a noise absorbing layer and these two components are joined by adhesive bonding or by pinning. The absorption layer is made of plastics bonded elastomer fibre plates reinforced with fabric layers. Elastomer fibres can be mixed with mineral fibres. These plates are placed on the reinfoced concrete. This primary absorption material is connected in series with a secondary absorption material which fills the grooves of the air noise absorbing reinforced concrete wall plates completely or partly.