EFFECT MANAGEMENT OF ELEVATED TEMPERATURE ON MECHANICAL AND MICROSTRUCTURE PROPERTIES OF REINFORCED CARBON FIBER LIGHTWEIGHT CONCRETE

This paper studies the effect management of highte mperature on mechanical characteristics of carbon fiber reinforced light weight aggregate c oncrete. The effect of using high range water reducing agent HRWRA (High range water reducing admixture) with 8% SF (silica fume), as a partial replacement by weight of cement, on the behavior of LWAC (Light weight aggregate concrete) is also studied. Workability, fresh and hardened density, compressive strength, splitting tensile strength and modulus of rupture tests were performed, on specimens of both ages 7 and 28 days. The test results indicated that the inclusion of carbon fiber to the light weight concrete mix d id not affect the compressive strength significantly, while the splitting tensile strength and the modulus of rupture were improved significantly.