ROAD NOISE REDUCTION IN URBAN AREAS: METHODS FOR TESTING ASPHALT RUBBER PERFORMANCE

Asphalt Rubber (AR) binder, as a mixture of about 80 percent hot asphalt and 20 percent ground waste tire crumb rubber is a sustainable resource technology. It is a green technology, not only for the use of recycled material but also because Asphalt Rubber’s mechanical performance allows pavement thickness reduction, saving natural resources and money, and reducing CO2 emissions.
The paper introduces the main parameters connected to the study of the environmental sustainability related to the production and laying of Asphalt Rubber hot mixes and to noise reduction. After a brief summary of the state of this technology in Italy, some results of a quantitative analysis of environmental benefits arising from the use of this material are shown, highlighting the significant savings achieved under construction, in addition to the benefits of longer duration with less maintenance. Regarding acoustical emissions, the present work is focused in the methodology to evaluate the use of Asphalt Rubber for noticeably reducing roadside noise levels in different scenarios. In particular, the authors are leading a project aiming to develop and test a specific methodology for measuring the performance of asphalt rubber mixtures in cities. Some peculiar aspects of traffic noise reduction in urban areas by means of rubber based have been studied and a synthesis of in-progress results will be reported in the paper.

Autori: Antunes, Luzzi