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Revista de la Facultad de Ingeniería Universidad Central de Venezuela

Print version ISSN 0798-4065

Abstract

ALBANO, Carmen et al. Properties of modified portland cement concrete with scrap rubber at different w/c ratios. Rev. Fac. Ing. UCV [online]. 2013, vol.28, n.1, pp.97-113. ISSN 0798-4065.

The objective of this work was to study concrete compounds modified with automobile tire tread residues, through destructive and non destructive essays. Compressive, indirect tensile strength and flexural strength studies done to compounds with different compositions of rubber waste (5 and 10 wt%) and with different rubber particle size at ages of 7, 28 and 60 days, indicate that the scrap rubber addition decreases these mechanical properties. Nonetheless, this behavior can be profitable when some ductility of the material is required. When analyzing water/cement ratios (0.45, 0.60), it was demonstrated that higher values of mechanical properties are obtained with the lower ratio. With respect to impact tests, the rubber addition considerably improved the energy absorption. It was also observed that an improvement in the capacity of concrete-rubber composites for attenuating the acoustic waves respect to traditional concrete was not achieved. Thus, it is feasible to reuse scrap rubber, regardless its particle size, as aggregates for concrete mixtures since the main characteristics of the concrete are not deteriorated. Besides, we can expect a reduction of self-weight of concrete and also the protection of the environment by recycling waste resources.

Keywords : Concrete; Rubber waste; Water/cement; Mechanical properties; w/c ratio.

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