ACOUSTIC PROPERTIES OF ROAD SURFACE CONTAINING CRUMB RUBBER

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 2, 21-26 pp

ABSTRACT
The results on acoustic properties of road pavement on the experimental section of road II/548 (Slovakia) are presented in the paper. The results were obtained from the measurements of noise levels which were carried out in 2014. The road surface of
experimental section AC O 11 was prepared with the addition of crumb rubber (1,25%)
from recycled tires as a substitute of aggregates in asphalt mixture. The measurements
were carried out using the SPB (Statistical Pass-By) method and the maximum noise
levels during the passage of the vehicle near the microphone were also detected. The
SPBI index was calculated and the results were compared with those obtained for the
reference pavement in order to determine the impact of innovative road surface
(containing crumb rubber from recycled tires) on noise levels.

Keywords: noise, measurements of noise levels, Statistical Pass-By method, SPBI
index