A Laboratory Study on Performance of Slag Based Concrete over Conventional Concrete

Natural aggregate are major constitution of concrete and there are becoming scarce material. Aim of present study is to protect environment. Element with respect to consumption of natural resource and waste material. So, we need to pay attention on replacement of natural aggregate. The byproducts of steel and iron industry are considered as waste and it is categorized as industrial waste in most of the countries. Based on cooling slag were divided such as crystalline, granulated etc. Air Cooled Blast Furnace Slag (ACBFS) can be used as coarse aggregate and Granulated Blast Furnace Slag on ground(GBFS) as fine aggregate. In this investigation, M40 grade of concrete each having four type of concrete mix C:S:A, C:GBFS:A, C:S:ACBFS, C:GBFS:ACBFS with varying slag percentage and the compressive strength and flexural strength were determined by adopting conventional testing procedure. From this study it has shown that concrete will develop sufficient strength by replacement of fine aggregate by GBFS was found to be maximum for 60% replacement which was 56.41N/mm2, it was found to be 10.32% higher from M40 grade of concrete. The flexural strength of concrete decreases with increase in percentage of GBFS and ACBFS. But replacement of GBFS satisfies the minimum requirement and up to 60% replacement of ACBFS shows minimum required flexural strength of concrete (4 Mpa as per IRC: 58-2002) for rigid pavement.