DBPapers
DOI: 10.5593/SGEM2014/B42/S18.010

EFFECTS OF POST-CONSUMER TYRE RUBBER ON THE MECHANICAL PROPERTIES OF MORTARS

I. O. Toma, O. M . Banu, R. G. Taran, M. Budescu, N. Taranu
Wednesday 1 October 2014 by Libadmin2014

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, 73-78 pp

ABSTRACT
Hundreds of millions of scrap tires are generated in developed countries all over the
world and start posing a serious environmental problem as current disposal methods are wasteful and costly. One of the best methods of recycling used tires is to reuse them after rethreading. The resulting rubber crumbs can find their use concrete because, together with steel wires, they have a restraining effect on the crack propagation, leading to an increased ductility and energy absorption capacity. The paper presents the preliminary results obtained from a long series of experimental investigations on the suitability of using rubber aggregate as mineral aggregate substitute in Portland cement concrete mixes. The research focuses on determining the strength characteristics of rubberized mortar depending of the percentage of rubber crumbs present in the mix. It was found to possess smaller unit weight than traditional cement based mortar. A statistical analysis of the experimental data shows that the percentage by volume of rubber in the mix has a significant effect on strength. Unlike plain mortar, rubberized mortar did not exhibit the typical brittle failure but a more ductile one.

Keywords: rubberized mortar, tire rubber crumbs, flexural strength, compressive strength of rubberized mortar

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