In the case of surveyed concrete mixture inside the
test mould, the value of heat of hydration reached the temperature
of the surroundings, concretely to the value of
20.8 °C, after 26 hours after placement of concrete mixture
into the test mould. Only in the top layer of concrete mixture
(layer 1 and a part of layer 2) the hydration heat
reached the temperature about 0.8 °C lower than the surroundings.