ASTM C1753/C1753M-21a PDF Download

ASTM C1753/C1753M-21a is a standard practice that provides guidelines for evaluating the early hydration of hydraulic cementitious mixtures using thermal measurements. The practice describes the apparatus and procedure for determining the relative differences in early hydration of cementitious materials such as paste, mortar, or concrete.

The standard highlights the importance of calorimetry, which is the measurement of heat lost or gained during a chemical reaction, in describing and evaluating hydration and early-age property development. Calorimetry can be performed under different conditions, such as isothermal, adiabatic, or semi-adiabatic. However, this practice does not focus on measuring the heat evolved from the test specimens due to hydration. Instead, it utilizes temperature measurements to evaluate the early hydration process.

The standard also emphasizes the caustic nature of fresh hydraulic cementitious mixtures, highlighting the potential for chemical burns if prolonged exposure occurs. Safety precautions need to be taken when handling and working with these substances.