Today the concrete is the one of the most widely used
construction material, its great advantage in terms of
building constructions is its universality in use, good
mechanical features in the pressure and possible
connection with steel. The concrete is fine-ground
inorganic material, which works like hydraulic binder.
After mixture with water it makes concrete paste, which
lastly stiffens and hardens. After hardening it retains its
strength even in the water. This processes hardening and
conversion of cinder minerals into concrete stone are
called concrete hydration by which so called heat of
hydration is released.