Corrosion behaviour of reinforced concrete constructions in acid aggressive environments: case studies, laboratory tests and corrosion mechanisms

Publisher： Edp Sciences

E-ISSN： 2261-236x|149|issue|01018-01018

ISSN： 2261-236x

Source： MATEC Web of conference, Vol.149, Iss.issue, 2018-02, pp. : 01018-01018

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Abstract

The paper presents the results of research on the corrosion behaviour of reinforced concrete elements which compose the bearing structure of some constructions subjected to the corrosive action of acid aggressive agents, after a long-term service in a strongly aggressive environment. To evaluate the damage state of reinforced concrete elements/constructions, both “in situ” investigation of constructions and laboratory tests on concrete samples extracted from some elements damaged by corrosion, using a specific investigation methodology were performed. The results of the research revealed the existence of a severe corrosion-induced damage of the structural elements, which affected the resistance, stability and durability of the constructions. Based on case studies on the service behaviour of reinforced concrete elements, there are pointed out the specific damages generated by the corrosive action of the acid aggressive agents, the causes of their occurrence and presents considerations on the mechanisms of the corrosion processes of concrete and steel reinforcement in acid aggressive environments. Finally, there were proposed intervention measures in order to assure normal service conditions of the reinforced concrete constructions located in such aggressive environments.