17-08-2012, 02:17 PM
A STUDY ON EFFECT OF ELEVATED TEMPERATURE ON STEEL FIBRE REINFORCED CONCRETE
ABSTRACT
The modern Civil Engineering construction have their own structural and durability requirements related with concrete to better suit intended function of structure. It is necessary to develop the concrete of special properties, so that the structure continues to perform its intended purpose for a long time. Accordingly the latest achievements in concrete ingredients and the technology of production, lead to the development of concrete with Steel fibre reinforcement which has several advantages to that of ordinary concrete.
Fire represents one of the most severe risks to buildings and structures. More and more attention has been paid to the mechanical properties of concrete at high temperature, or the residual properties of concrete after exposure to elevated temperatures. High temperature causes dramatic physical and chemical changes, resulting in the deterioration of the concrete. An assessment of the degree of deterioration of the concrete structure after exposure to high temperatures can help engineers to decide whether a structure can be repaired rather than required to be demolished.
The objective of this report is to increase the insight of the mechanical behaviour of steel fibre reinforced concrete (SFRC), prepared with steel fiber reinforcement, after exposure to elevated temperatures. Strength and bonding characteristics of steel fibre reinforced concrete (SFRC) subjected to elevated temperature are then compared with those of plain concrete (PC) or concrete reinforced with steel rebars (RCC). Also, a study on the effect of elevated temperature on bond strength of SFRC and RCC have been carried out.