Effectiveness of micro phases on water/cement ratio

Multiple linear regression (MLR) analysis has been performed to determine the effects of microstructural phases formed during hydration period of cement pastes to forecast their water/cement ratios. Image analysis methods have been used to determine the properties of microstructural phases in order to predict water/cement (w/c) ratio of cement pastes. Water/cement ratio has a great effect on strength and durability characteristics of cement-based structural members in their service life. In this study, the relationship between microstructural phases such as anhydrated cement part, hydration products, capillary porosity, and w/c ratios predicted by MLR analysis, has been established. The predicted values are compared with estimated values obtained by proposed method in the literature. MLR model indicates that volumetric ratios of microstructural phases in cement paste are effective in predicting w/c ratios of cement pastes.