The hydration of concrete binder is an exothermic
reaction. The hydration of concrete happens after cinder
is a mixture with water. During this process are gradually
raised fine crystals and proportional couplings in the
concrete mixture and heat is released. Intensity of
hydration heat is proportional to reaction speed in
dependence on the chemical-mineralogical structure of
concrete, presence of active additives and ambient
conditions. The total value of hydration heat of fully
hydrated concrete is the sum of hydration heats of
particular cinder minerals, which values (on 1 kg) are
considerably different (Tab. 1).