Statistical modeling of mechanical and transport properties of concrete incorporating glass powder

The objective of this study is to model the effect of the partial replacement of cement by glass powder (GP), w/cm, and supplementary cementitious materials (SCM) content, as well as their coupled effects on key engineering properties of concrete using a statistical design of experiments. The modeled experimental domain includes concrete mixtures with w/cm ranging between 0.27 and 0.69, GP percentages of 0-50%, and SCM content of 310 to 440 kg/m(3). The modeled responses include the compressive strength and rapid chloride ions permeability (CIP) at various ages. The comparison between predicted and measured responses determined on eight selected mixtures included in the experimental domain indicates good accuracy of the established models to describe the effect of the independent variables on the targeted properties. The derived statistical models indicate that the CIP is dominated by substitution percentage of GP, while the compressive strength is dominated by w/cm, regardless of the age of concrete. The increase in GP content to 30% resulted in a significant reduction in CIP. However, it reduces the compressive strength at early age, which may necessitate a decrease in w/cm to compensate for strength reduction. Trade-off between mixture parameters to achieve targeted compressive strength and CIP properties were established.