Characterization of concrete cracking due to corrosion of reinforcements in different environments

This paper shows the results of a laboratory experimental study, characterizing cracking on concrete beams produced by corrosion of steel reinforcement exposed to different atmospheres. These environmental conditions were obtained by means of two electrolytic media: one alkaline, simulating the situation that occurs in an industrial environment, with beams exposed to a saturated solution of Calcium Hydroxide; and another with beams exposed to a Sodium Chloride solution, simulating de-icing or a marine environment. Test samples in reduced lab scale were tested too, in order to identify the different corrosion products generated in each case (and their influence on concrete cracking). Observation showed that the consistency of these products and the variation of the concrete consistency with regard to the environment employed, govern the cracking process.