Entwicklung akustisch optimierter Straßendeckschichtsysteme auf Kunststoffbasis

Development of an acoustically optimized wearing course system based on synthetics

To facilitate modern economies, the development of society and the extension of economic areas the traffic sector plays a decisive role by supplying a technically functioning, efficient and environmentally compatible infrastructure. Due to the increase of transportation processes, especially in the freight sector, the mode of transport "road" is of great importance in this regard. However, this causes a steadily increasing exposure of the population to traffic-induced emissions - noise emissions, in particular have received more attention in recent years! Public infrastructure construction is subjected to numerous attempts aiming to standardize the tasks as well as the limitation of costs. The result has been that the innovation potential, especially in regard to designs limiting traffic noise, has not been made use of sufficiently. Furthermore, the performance limit of conventional materials has almost been reached which is why this research project developed and designed a completely new surface-material concept based on synthetic materials. The surface-system was designed to exhibit the highest possible acoustically favorable properties, was verified by examinations in the Vehicle-Pavement Interaction Facility of the Federal Road Research Institute (BASt) and was constructed in-situ. The focus of the project was the development of a multi-layered wearing course system with a synthetic top layer, representing optimized texture-properties and a synthetically-bound bottom layer functioning as an absorption layer. In addition to the acoustic efficacy of such a wearing course system, the structural feasibility as well as the durability of the concept are the subject of the analysis.