EFFECT OF ELEVATED TEMPERATURE ON CONCRETE CONTAINING WASTE TIRES RUBBER

Rubberized concrete is like normal concrete but with replacement part of aggregate (fine or coarse) by waste tires rubber, in this paper only a part of coarse aggregate was replaced by crushedrubber. The objective of this paper is to study the effect of elevated temperatures on concrete containing waste tires rubber which used in civil construction like in rigid concrete pavement. Five different ratios of rubber were used as a replacement of the volume of coarse aggregates of concrete by 2.5%, 5%, 10%, 15% and 20%. Various concrete specimens; slabs, prisms, cubes and cylinders were used. Specimens were exposed to different temperatures (50° C and 70° C for five hours and 300° C for two hours). From results, flexural strength decreases significantly with the increase in the proportion of rubber content in concrete and elevated temperature. While the compressive strength was more sensitive to temperatures where the compressive strength of the concrete containing the rubber is adversely affected by increasing temperature. Also, it was noticed that the splitting tensile strength was very sensitive to temperature than the compressive strength.