COPS – concrete with open porous surface

Abstract

Tire-road noise is the dominating sound source in road traffic. Therein, the airpumping effect, the horn effect and the groove resonances assume an essential role within the noise development. Currently, the reduction of sound emissions from the concrete pavements is achieved by a sufficient surface roughness. In Germany, this is realized by the standard construction method with exposed aggregate concrete. In addition to the defined surface textures, it is also possible to produce an upper thin concrete layer with a near surface macro pore system accessible to the sound pressure. A high sound absorption can be achieved through the interconnected macro pore system in the near surface area.