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Open AccessArticle

Noise Reduction Properties of an Experimental Bituminous Slurry with Crumb Rubber Incorporated by the Dry Process

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Laboratory of Acoustics Applied to Civil Engineering (LA2IC), Universidad de Castilla-La Mancha, Avda. Camilo José Cela s/n, 13071 Ciudad Real, Spain
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Road Engineering Laboratory, Empa, Swiss Federal Laboratories for Material Science and Technology, Ueberladstr. 129, CH-8600 Duebendorf, Switzerland
3
Environmental Sciences and Technologies Department, University of Liège, Passage des Déportés 2, 5030 Gembloux, Belgium
*
Author to whom correspondence should be addressed.
Coatings 2014, 4(3), 602-613; https://doi.org/10.3390/coatings4030602
Received: 12 June 2014 / Revised: 29 July 2014 / Accepted: 1 August 2014 / Published: 11 August 2014
(This article belongs to the Special Issue Low-Noise Road Surfaces)
Nowadays, cold technology for asphalt pavement in the field of road construction is considered as an alternative solution to conventional procedures from both an economic and environmental point of view. Among these techniques, bituminous slurry surfacing is obtaining an important role due to the properties of the obtained wearing course. The functional performance of this type of surfaces is directly related to its rough texture. Nevertheless, this parameter has a significant influence on the tire/road noise generation. To reduce this undesirable effect on the sound performance, new designs of elastic bituminous slurries have been developed. Within the FENIX project, this work presents the acoustical characterization of an experimental bituminous slurry with crumb rubber from wasted automobile tires incorporated by the dry process. The obtained results show that, under controlled operational parameters, the close proximity sound levels associated to the experimental slurry are considerably lower than those emitted by a conventional slurry wearing course. However, after one year of supporting traffic loads and different weather conditions, the evaluated bituminous slurry, although it conserves the original noise reduction properties in relation to the conventional one, noticeably increases the generated sound emission. Therefore, it is required to continue improving the design of experimental surfaces in order to enhance its long-term performance. View Full-Text
Keywords: bituminous slurry surfacing; acoustic characterization; crumb rubber; dry process; noise reduction properties; tire/road close proximity; close proximity (CPX) method bituminous slurry surfacing; acoustic characterization; crumb rubber; dry process; noise reduction properties; tire/road close proximity; close proximity (CPX) method
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Bueno, M.; Luong, J.; Terán, F.; Viñuela, U.; Vázquez, V.F.; Paje, S.E. Noise Reduction Properties of an Experimental Bituminous Slurry with Crumb Rubber Incorporated by the Dry Process. Coatings 2014, 4, 602-613.

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