Statistical techniques to analyze properties of nano-engineered concrete using Recycled Coarse Aggregates

Abstract

This paper aims at evaluating effect of incorporation of Nano-Silica as replacement of cement on natural and recycled aggregate concrete using Two-way Analysis of Variance (ANOVA). In this study 3, 7 and 28 d compressive strength, Modulus of Elasticity, Water Absorption, Density, and Volume of voids are considered as responses. Principles of general factorial design is adopted for selection of number of mixes with consideration of Nano-Silica (%) and Recycled Coarse Aggregate (%) as two factors for this study. The ANOVA of test results depicts that these two factors have significant effect on compressive strength, Water Absorption, Density, and Volume of voids. However, the analysis of results indicates that only Recycled Coarse Aggregate (%) has considerable influence on Modulus of Elasticity. Moreover, there are no substantial influences of interaction of two factors on the selected properties of concrete.