Accurate prediction of the carbonation rate of a particular concrete is important for the correct assessment of both durability and environmental impact of reinforced concrete (RC) structures. Applied loading and caused by it concrete cracking are major factors affecting the carbonation, which so far have received little attention of researchers, especially this concerns 'green' concretes, i.e. concretes in which Portland cement (PC) is partially replaced by supplementary cementitious materials such as fly ash (FA) and ground granulated blast-furnace slag (GGBS). The aim of this paper is to present laboratory data arising from experiments to study the influence of static loading and associated concrete cracking on the carbonation resistance of RC elements made of PC concretes and 'green' concretes containing significant amounts FA and GGBS. For this purpose, six different concrete mixes with two different water/binder (w/b) ratios (0.40 and 0.55) and different proportions of PC, FA and GGBS were prepared. Twelve RC beams (100×120×900mm) and a number of 100-mm concrete cubes were cast, 28-day cured and then kept for three months under temperature and relative humidity to reach equilibrium with those of an carbonation-accelerated chamber used in the tests. The RC beam specimens were loaded in four-point bending to produce tensile cracks of different widths and then placed into the carbonation chamber along with unloaded cube specimens to be subjected to accelerated carbonation for 120 days. Results of the experiments show a significant effect of loading (both tensile and compressive stresses) on the carbonation resistance of the concretes, especially of 'green' concretes.