Isothermal calorimetry is used to monitor the heat evolved from a sample as a result of the reactions occurring in the system during a certain period of time. One of the main applications of this technique is to study the hydration of cementitious materials. Heat flux and heat of hydration data allow for the determination of reaction rates, optimization of mixing designs, formulation of admixtures, and estimation of mechanical properties.
Equipment: Isothermal Calorimeter Calmetrix I-Cal 4000 HPC (dimensions: 55 cm x 42 cm x 56 cm)
sample sizes up to 125 ml;
paste, mortar and concrete samples;
test temperature 5-70 °C;
test duration up to 28 days.
Software: I-Cal Logger; I-Cal Reports; I-Cal Set (setting times); I-Cal Strength (compressive strength); I-Cal AE (activation energy); I-Cal SO3 (sulfate optimization).