COST BENEFITS OF RECYCLED AGGREGATE CONCRETE DESIGNED USING SCHEFFE’S MODEL

This work investigated the cost benefits of Scheffe’s optimized recycled aggregate concrete. It adopted the combination of analytical and experimental methods of scientific investigation. Analytically, Scheffe’s optimization approach was used to formulate a theoretical model which was processed by computer using PYTHON language. A total of thirty mix ratios were used in this study. The first fifteen mix ratios were used to formulate the model while the remaining fifteen mix ratios were used to validate it. The formulated model was tested for adequacy at 5% level of significance using Fisher statistical test and was found to be adequate.The overall cost of Scheffe’s optimized recycle aggregate concrete considering all the mix proportions was N 2,954,935.36k while that of natural aggregate concrete was N 3,028,080.41k. Scheffe’s optimized recycled aggregate concrete was more economical having the Overall and the Optimal cost benefits of 2.42% and 3.51% respectively.