Use of Taguchi Optimization Technique in Pavement Concrete Mix Design

In a concrete mix design, there are many mix variables affecting the concrete performance. If all the mix variables are taken into account, it may be necessary to use the full factorial design of experiment to obtain the concrete in the desired mechanical properties. It means more need of material, personnel, money and time. It is not a cost effective solution. For the cost effective concrete mix design, it needs an alternative design of experiment. For such situations, Dr. Genichi Taguchi suggests the Taguchi design of experiment method. In this study, Taguchi optimization technique was used to obtain the optimum levels of the mix variables for concrete being used in rigid pavement. Cement to binder ratio (0,35-0,40 and 0,45%), max. aggregate size (8mm, 16mm and 32 mm), silica fume content (5-10-15 %) and fly ash content (10-20-30 %) were selected as mix variables. L9 orthogonal array was used in the Taguchi design. Modulus of rupture values was determined of the beam specimens. These values were used in the optimization process. It was shown that Taguchi optimization technique is a promising tool for the pavement concrete mix design.