Study on Silica Fume Concrete Subjected to High Temperature

Abstract

High strength concrete incorporating silica fume now-a days is being increasingly used worldwide. Quite often in various industrial structures such high strerrgth con crete is used at extreme conditions of temperatures. At high temperatures, the compressive strengtlr and coef fiJent of thermal expansion of concrete gIt altered(1-6) resulting in redistribution of stresses irr various structural members. ln reinforced concrete structures the borrd between the reinforcement and concrete gets weakened due to .ru.king(7), which everrtually leads to the reduc tion in load carrying capacity of the structt rres. All these aspects should be considered by the desigrrer at the design stage itself to avoid possible damages of concrete structures under the influence of high temperatures and also to enhance the durability of such structures. With this view a detailed experimental investigation has been conducted to know the behaviour of tl-re concrete containing silica fume and subjected to higlr tcmpera tures with respect to compressive streng