Eco-Innovative Use of Red Mud: Impact on the Compressive Strength of HSC
DOI:
https://doi.org/10.64059/eiu.v1i1.68Keywords:
Red Mud , Waste , High strength concrete , Compressive strengthAbstract
This study investigates the effect of partial replacement of Portland cement with red mud on the compressive strength of high-strength concrete (HSC). Red mud, an industrial by-product of alumina production, was replaced at ratios of 5, 10, 15, 20, 25, 30, and 35% by weight of cement. Compressive strength tests were performed on the produced concrete cubes. The results showed that a reference HSC mix (0% red mud) achieved a compressive strength of 85 MPa. However, red mud replacement reduced the compressive strength at all ratios, decreasing to 70 MPa at 5% and 56 MPa at 35%. In contrast to reported results for medium-strength concrete, where optimum red clay ratios (e.g., 10–20%) can maintain or increase strength, no such optimum ratio was observed for the high-strength concrete investigated here.
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