A Study on the Compressive and Split Tensile Strength of Steel Slag Concrete Mixes for Rigid Pavement

The growing of infrastructures are the mostly compromised now day for making the mobility of people and goods. In this case the development of any country increases when there is sufficient infrastructures. The roads constructions is the mostly infrastructure promoting quickly development of any country. The pavement materials are required to construct the good roads which helping to connect the different locations. The natural aggregates are occupied the 75% of concrete volume, therefore it is very interested to find the alternative materials which can replace the natural aggregates in order to save environment as well as the economically. The steel slag is the co-product of mills steel industry in which the pig iron are molted in BOF and EAF for reproducing the waste steel materials that can be used as coarse aggregates in place of natural coarse aggregates. This material is strong enough because of its composition of steel for high percentage. The main objective of this research is to check the suitability of coarse steel slag aggregate in concrete mixture. The engineering properties were studied for materials as well as the fresh and hardened concrete.The slump, compacting factor and unity weight tests have been evaluated for fresh concrete and showed that as increment of steel slag % and also the properties improved. The compressive and spilt tensile strength was evaluated by using Indian standard method. The result sowed that as increment of steel slag% improve the hardened properties progressively up to 30% and start decrease up to 40% for compressive strength. The split tensile strength increases as steel slag % also increase up to 40%.The proportion of replacement natural coarse aggregates 0, 10, 20, 30, 40% by coarse steel slag. The concrete mix of M40 was selected for rigid pavement and water cement ration of 0.4.