Avanço da frente de carbonatação na estrutura de concreto armado do primeiro edifício de apartamentos do município de Passo Fundo - RS

Abstract

Carbonation is one of the most common pathological manifestations in reinforced concrete elements. This phenomenon alkalinizes the concrete, removing its chemical protection, allowing the entrance of agents and can cause the corrosion of the armature. There are several factors that interfere with the velocity of this carbon dioxide diffusion, such as water / cement ratio, environmental aggressiveness class, mineral additions, pore saturation condition, concrete release and curing process. In the present work the carbonation front was analyzed in a residential building from the 1940s, comparing the variation between internal and external points of the building, taking into account current and current standards at the time of its construction. The results obtained in this study indicated that the design life of the building is already closed, because at the front of carbonation already found the armature, pointing out the need for repair of the structure.