Influence of Elevated Temperature on Concrete with Partial Replacement of Cement by Ground Granulated Blast Furnace Slag

Ground Granulated Blast Furnace Slag (GGBFS) can partially replace cement in concrete has been utilized as construction material due to its environmental, economic and technical benefits. The objective of this paper is to investigate the effect of elevated temperature on mechanical properties such as compressive strength, splitting tensile strength and flexural strength of concrete with GGBFS as a mineral admixture with 1% steel fibres and investigate most suitable combination for M25 grade concrete. In this paper, influence of elevated temperatures on properties of concrete made with ground granulated blast furnace slag (GGBFS) with replacement ratios of 20 percent, 40 percent and 60 percent by weight of cement. The concrete specimens were subjected to different elevated temperatures at 200°C, 400°C, 600°C, 800°C, 1000°C and 1200°C with exposer time of one hour. After that the compressive strength, split tensile strength and the flexural strength of concrete were determined. For this purpose cube (150 X 150 X 150 mm), cylindrical (150 X 300 mm) and beam Specimens (100 X 100 X 500 mm) of size were made. This research work developed some important data on the properties of concrete exposed to elevated temperatures.