Prediction of 28-day Compressive Strength of Concrete from Early Strength and Accelerated Curing Parameters

Abstract-Predicting 28-day compressive strength of concrete is an important research task for many years. In this study, concrete specimens were cured in two phases, initially at room temperature for a maximum of 30 h and later at a higher temperature for accelerated curing for a maximum of 3 h. Using the early strength obtained after the two-phase curing and the curing parameters, regression equations were developed to predict the 28-day compressive strength. For the accelerated curing (higher temperature curing) both conduction and radiation heating methods were attempted. The results show that multiple linear regression model, which uses the conduction heating process, performs best. Keywords-cement concrete, accelerated curing, microwave curing, prediction, compressive strength.