A low-cost, computer-controlled adiabatic calorimeter for determining the heat of hydration of concrete

An understanding of the rate and amount of heat generated during the early stages of hydration of concrete mixes is essential in the prediction of the thermal behavior of concrete structures. This paper describes the design and operation of a low-cost, computer-controlled adiabatic calorimeter used for the determination of the heat of hydration of concrete mixes using small samples of the concrete. Heat measurements are started approximately 10 min after water is added to the concrete and a continuous plot of the rate of heat generation is obtained. Furthermore, the use of the calorimeter for temperature-matched curing tests on concrete is also discussed.