An Empirical Investigation Of Relationship Between Water/Cement + RHA Ratio And The Compressive Strength Of RHA Concrete

Abstract

The study has empirically examined the relationship between water/cement + RHA ratio and compressive strength of RHA Concrete. Using a 35% replacement of OPC with RHA, RHA concrete cubes were cast with varying water/cement + RHA ratios (0.60, 0.63, 0.68, 0.72, 0.81, 0.86, 0.90 and 0.99 respectively) and theircorresponding compressive strengths determined. Applying a statistical technique (Pearson Product moment correlation), it was established that a positive correlation (0.63) exist between the variables. The study further indicated that 39.46% of the total variations in compressive strength of RHA concrete for seven (7) days are due to the water/cement + RHA ratio. The rest variations (60.54%) need to be investigated.