Performance of SCC With Partial Replacement of Ingredients of Conventional Concrete by Slag

In the present world concrete is not just a construction material consisting of cement, aggregate, and water, but it is an engineered custom-tailored material with several new constituents to meet the specific needs of construction industry. Self-consolidating concrete or self-compaction concrete is the most sought out technology in the concrete industry. It is a highly flowable type of concrete that spreads into the form without the need for mechanical vibration. The importance of selfcompacting concrete is that maintains all concrete's durability and characteristics, meeting expected performance requirements. Slag is a byproduct of steel production and is similar in character to volcanic rocks such as basalt and granite. Slag is primarily used in the cement and construction industries, and largely in road construction. It is a stony waste matter separated from metals during smelting or refining of ore, and one such constituent which can maximize economic and environmental benefit. Several experiments have proved that it can be used as an effective natural aggregate having a long-term effect on sustainability. In this research SCC and conventional concrete specimens with varying proportion of slag aggregates were tested for the compressive strengths. The mix design is prepared as per Indian Standard code, IS 10262-2019 with varying water cement ratios to find the optimum percentage to replace the fine aggregates with slag. Three specimens of each mix design were tested for 3-, 7 and 28-days strength and their results noted. The results show that increase in slag content increases the strength of concrete considerably and however significant results can be obtained by using 50% replacement of fine aggregates by slag. Thus, it is observed that concrete can be used to recycle slag in many ways.