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Corresponding Author

Safwat, Walid

Subject Area

Civil and Environmental Engineering

Article Type

Original Study

Abstract

Utilization of rubber tire waste products in concrete has attracted attention because of energy crisis and the environmental problems. The concrete are postulated to be a potential material especially for construction applications, which are subjected to impact effects such as crash barriers, bridges and roads. In this study, an analysis of rubberized concrete was done by using various proportions of crumb rubber as a replacement of sand by volume [0 %, 15%, 30%, 50% and 100%). The slump for five different mixes was measured. On the other hand twenty plain and reinforced concrete beams with dimensions (10 x 10 x 70 cm) were prepared for impact resistance lest. The impact resistance was measured as a kinetic energy, which generated by falling of a load (15 kg.) from variable distances until the failure occurs. Cubes, cylinders and beams were prepared to study the compressive strength, toughness and impact for rubberized concrete. The concrete mixtures exhibited lower compressive strength than normal concrete, however the samples did not has a brittle failure but it has a ductile failure, and has the ability to absorb large amount of plastic energy under impact strength. On the other hand the results showed that the impact resistance of rubberized concrete was higher.

Keywords

Concrete beams; Rubber tire aggregate; Workability; Slump; Compression; impact

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