Sound absorption element for noise protection walls

摘要

The sound absorption material consists of an evenly mixed porous concrete layer (7), which is connected sandwich-like to the sound absorption element (1). An intermediate layer (6) of non-porous concrete between the two acts as an aid to adhesion. This layer contains a reinforcement of bars or a net (5). Reinforcing bars project from the reinforcement into the porous concrete layer. The sound absorption element has pref. cylindrical or conical projections, which project into the intermediate layer.