Assessment of Concrete Produced with Foundry Waste as Partial Replacement for River Sand

摘要

The assessment in this research is targeted at determining the percentage of foundry waste suitable to be used as a partial replacement for fine sand aggregate. Experimental result reveals that 15% of foundry sand is appropriate as partial replacement of fine sand aggregate for preparation of grade 20 concrete by application of compressive strength equation as targeted strength of concrete were established at 28 days. The mathematical tools known as least square model was also applied to simulate the best equation of the curve for the purpose of prediction of compressive strength for the design of WFS concrete. The equation of best fit is given as (б) = 13.77wfs + 13.65 for 7 days and 28 days and (б) = 1.303wfs + 17.49 for21 days. The developed equation illustrates the usefulness of least square model in monitoring the compressive strength of concrete upon the variation of percentage replacement with waste foundry sand.