The Water Cement Ratio Suitable for Combining Recycled Aggregate Concrete with Natural Coarse Aggregate

This scientific experimentation investigates the water cement ratio that will be satisfactory on the workability and compressive strength of concrete produced by combining recycled aggregate concrete with natural coarse aggregate. The outcome for the workability gotten from a w/c ratio of 0.6 for recycled aggregate concrete was 20mm, 34mm, 80mm, 24mm, 6.5mm, 17.5mm, 27.5mm, 26.5mm and 6mm at 0%, 5%, 10%, 15%, 20%, 25%, 30%, 40%, and 50% of combining recycled aggregate concrete with natural coarse aggregate respectively. Meanwhile the workability procured from a 0.7w/c gave 80mm, 34mm, 190mm, 100mm, 135mm, 145mm, 162.5mm, 66.5mm, and 35mm at 0%, 5%, 10%, 15%, 20%, 25%, 30%, 40%, and 50% correspondingly of percentage replaced recycled aggregate concrete. For a water cement ratio of 0.6, we have an optimum cube strength of 37.3mpa at 25% recycled aggregate concrete combined in with natural aggregate for 28 curing days, and the worst-case of 14.5mpa at 50% recycled aggregate concrete. Whereas the water cement ratio of 0.7 secured a maximum cube strength of 29.6mpa at 0% recycled aggregate concrete that is a hundred percent natural aggregate at 28 curing days and the poorest cube strength of 11.6mpa at 50% recycled aggregate concrete in 28 curing days.