Heat-flux Differential Calorimetry
Toni Cal 7338
For the calorimetry experiments, a heat-flux-differential calorimetry (Toni Cal) is employed. Hereby, water and cement are mixed in the test chamber and the heat-flux and the heat-flux rate required to keep the hydrating sample at a pre-specified temperature (e.g. 30°C) are recorded from the first moment of reaction.
The energy required to keep the pre-specified temperature is monitored for both an inert reference sample and the hydrogenated sample, giving the heat flow Q(t) [J/g] associated with the hydration process (see, e.g., Figure 1).