City Research Online

Abstract

Pavements are made up of several layers with different mechanical and functional characteristics. The correct design of the surface layerof a roadmay leadto pavements with bettercharacteristics regarding ride qualityand safety, but also pavements that may be used as a measure against noise.The use oflow-noise pavements maybe aneffective measure to reduce the generation of acoustic pollutionby roadtraffic.This work aims to assesssome functionalcharacteristicsof a rehabilitated urban street,after two months in service conditions.The pavement was fabricated with a gap-graded bituminous mixture type Stone Mastic Asphalt(SMA) with crumb rubber(CR)from end-of-life (EOL) tires.This work studies the acoustic performance of the pavement, as well as other surface characteristics such as the macrotexturedepth(MPD)and the unevenness(IRI), establishing the relationship between them and the tire/road noise at different frequencies.Finally, the mainvertical acceleration frequencies of the pavement/vehiclesystemat 50 km/h were also assessedand related to the pavement unevennessand conservation.According to the results, this mixture might be used as a noise mitigation measure within the Action Plans of some urban areas with problems related to noise. The macrotexturedepthofthe mixture contributes to its acoustic performance at low frequencies;however, its acoustic performance cannot be totally explained from a macrotexture point of view

Publication Type:	Article
Additional Information:	© 2019. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Publisher Keywords:	Tire/pavement noise; Action Plans against noise; Surface characteristics; Mean Profile Depth; Vertical accelerations; Stone Mastic Asphalt;
Subjects:	T Technology > TA Engineering (General). Civil engineering (General)
Departments:	School of Science & Technology > Engineering
SWORD Depositor:	Symplectic Administrator

Export

Downloads