Optimization of concrete mix proportioning
Mohd Urooj Shariq, Jitendra Prasad, A. K. Ahuja · 2012
Abstract — The aim of this paper is to carried out statistical analysis for optimization of various concrete mix proportions by using full factorial experimental technique. The variables such as 28 days cube compressive strength, water to cement ratio (w/c), coarse aggregate to total aggregate ratio (CA/TA) and total aggregate to cement ratio (TA/C) were the parameters to be used for optimization. Four w/c ratios 0.4, 0.45, 0.5 and 0.6, four CA/TA ratios 0.60, 0.63, 0.65 and 0.70 and four TA/C ratios 3.9, 4.6, 5.3 and 6.0 were selected for regression analysis. The influence of w/c ratio, CA/TA ratio and TA/C ratio on compressive strength was experimentally carried out and analyzed using polynomial regression analysis. Mathematical polynomial model has been developed for compressive strength of concrete as a function of mix proportions. Based on the statistical analysis, optimum concrete mix for different mix proportions is proposed.