Activation energy based prediction model to estimate hydration related properties of sulphate resistance concrete incorporating temperature and moisture effects

For a durable construction of concrete structures, it is necessary to accurately estimate the evolution of hydration-related mechanical properties of concrete. In this study, a prediction model which is developed based on the concept that the apparent activation energy is a characteristic property of concrete is evaluated to estimate the mechanical properties of sulphate resistant concrete (SRC) incorporating temperature and moisture effects. For this purpose, a series of experiments were performed on SRC for different conditions of curing temperature and humidity. Experimental results revealed that the severe environmental conditions, particularly high temperatures and low humidity effects development of mechanical properties of SRC significantly. High curing temperatures along with continuous lower and higher degrees of saturation yield high early age and lower 28- day compressive strength, splitting tensile strength, and elastic modulus of SRC and vice versa for lower curing temperatures. Hydration-related properties of concrete were estimated by prediction model and compared to experimental results. A reasonably good agreement between experimental results and predicted values suggests that the activation energy based prediction model be used to accurately estimate the mechanical properties of SRC (compressive strength, splitting tensile strength, and elastic modulus), incorporating temperature, aging, moisture effects.

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