Study of Heat of Hydration in Mass Concrete

Abstract

Heat of hydration generated by cementitious materials is one of the major setbacks in case of mass concreting. Controlling heat and managing with ambient temperature is a herculean task while working with them. The differential potential if not maintained leads to cracks. Hence, it is essential to control this heat especially in the core. As per IS 456-2000 and ACI specifications, the temperature in the core shall not exceed 70 °C. However, there is no technical or literature support available on this matter barring experience. This study focuses on tracking of after effects of release of heat of hydration to a greater extent in mass concreting. Study also focuses on relationships between various ingredients of concrete and their contributions of heat. Understanding the heat of hydration in core is carried out using a special device called SMARTROCK2—a wireless sensor placed on rebars before the concrete pour. This measures the temperature development at regular intervals. Delivering high-accuracy data that can be accessed from any device through Android or iOS app. Study compiles heat of hydration data on the prototype.