Published Paper Details:

: Concrete is widely employed in the construction business these days and is essential to a building's structural elements. Concrete is a composite material composed of cement, water, and fine and coarse aggregate. Aggregate is a crucial component of these components in the creation of concrete. Natural sand is utilized as a fine aggregate in those aggregates. Due to the scarcity of sand, materials such as robo sand, steel slag, copper slag, clay aggregate, pumice aggregate, and quarry dust might be used in its place. Examining the manufacture of concrete utilizing steel slag and dolomite stone aggregate in place of fine aggregate is the main goal of this study. Using a number of experimental mixes with varying water binder ratios and super plasticizer contents, the current study examines the properties of hardened concrete of M40 grade concrete before achieving a good mix proportion. Steel slag aggregate and dolomite aggregate will replace the fine aggregate in the final mix's attained proportion by adjusting the fine aggregate percentage as 0%, 25%, 50%, 75%, and 100% by volume replacement. Nine different mixes of M40 grade concrete are made for this project. This includes four mixes of steel slag as fine aggregate with percentages of replacement to natural sand (0%, 25%, 50%, 75%, and 100%) and four mixes of dolomite aggregate and percentages of replacement to natural sand (0%, 25%, 50%, 75%, and 100%). The results of the slump cone and compaction factor tests are used to assess the workability of the concrete qualities. By determining the concrete's compressive strength, split tensile strength, and flexural strength, its attributes are ascertained. After the specimens have been cured for seven and twenty-eight days, non-destructive tests include ultrasonic pulse velocity and rebound hammer tests. Results show that replacing steel slag in concrete up to 50% results in fair results for split tensile, compressive strength, and flexural strength; replacing steel slag in concrete up to 25% results in fair results for split tensile, compressive strength, and flexural strength; and that values vary slightly as the proportion of steel slag and dolomite aggregate in the mix increases; above 25% of dolomite aggregate replacement in concrete results in split tensile and compressive strength that are somewhat decreased and fall within a significant range. Test results indicate that adding steel slag and dolomite aggregate to concrete strength blends clearly improves hardened properties.