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The fundamental aim of this study is to determine the effect of high temperature on the behavior of concrete consists NaOH treated rubber and steel fibers (TRSF-Con). During the experiment, four different concrete mixes were prepared; the first one is the control mix (CM) which was made with natural coarse and fine aggregates, cement, and water, while the other three concrete mixes were with the replacement rates of 10%, 20% and 25% of the natural coarse and fine aggregates by TRSF from used tires. The specimens were exposed for a period of 1 hour to design temperature-time curve up to 800oC followed by cooling to room temperature. Compressive strength, flexural strength, weight loss were determined and compared with that of control specimens. The ductility of the concrete increased with the increased of TRSF contents, increases the damping properties, and while the compressive strength of the concrete reduced with the increment of TRSF contents. Although data obtained in all parameters where lover than the control specimens, concrete containing treated rubber and steel fiber can be suitable for non- structural member in concrete and driveways or road constructions

Behaviour of Treated Rubberised Fiber Concretes at Higher Temperatures