ABSTRACT
ABSTRACT: In countries where climate conditions are often below zero and freeze/thaw cycles in present, concrete can face serious damaging problems due to non compliance of frost resistance. The frost resistance of concrete is normally studied when observed concretes are cured in normal laboratory conditions: +20◦C; relative humidity (RH) >95% before an artificial freeze/thaw simulation applied. Carbonation process is not active in moist environment and this process is not considered as a damaging factor. In real life climate conditions, concretes will withstand carbonation process that is not taken into account. Therefore this research focused on the damaging effect of carbonation process on frost resistant concrete after several freeze/thaw cycles. Concretes with limestone and granite coarse aggregates were prepared and studied. According to test results, carbonation process had a significant decreasing effect on the frost resistance of concretes with limestone coarse aggregate.
