LABORATORY EXPERIMENTAL STUDIES ON THE USE OF RUBBER POWDER IN BITUMINOUS ROAD LAYERS

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, 135-142 pp

ABSTRACT
This paper deals with laboratory experimental study on 50/70 bitumen supplied by
OMV Austria. This study aims to determine the characteristics of the bitumen in the
mass of which different percentages of rubber powder were introduced ranking betwen
8...20%. The rubber powder resulted in a proportion of 20 ... 80% from truck tires and up to 80 ... 20% from car tires waste, ground with a particle size not exceeding 1 mm.
Once the optimal percentage of rubber powder in the was determinated bitumen mass,
the bitumen was used to obtain a dosage of type BA 16 asphalt mixture, we determined its mechanical and physical characteristics and compared it with the same asphalt mixture made with no added weight rubber powder in the asphalt mix.
The results obtained on asphalt-rubber binders lead to changes in the basic properties
out of which we can mention the following: increasing the viscosity of the binder,
higher resistance to cracking, lesser brittleness, better cushioning impact tire-pavement. This paper presents the results of determining the common characteristics of bitumen and asphalt mixtures with the addition of rubber powder.

Keywords: bitumen 50/70, rubber powder, bitumen-rubber mixture