Uso de armaduras protegidas em estruturas de concreto armado em ambientes agressivos

Abstract

Reinforced concrete has been a great ally of the development of the construction industry all around the world, ever since its introduction to the system. At first it was believed to be a material with infinity durability, however, as years passed it was observed that the concrete structure reacted to environment conditions. The growth of urban centers resulted in an increase of CO2 in the atmosphere, leading to carbonated effects in concrete structures. Industrial development has also created the need for a better infrastructure, mainly for ports. Since these structures are exposed to the ocean, they are subjected to the worst kind of aggressive element to the concrete, the chlorides. The shortage of these structures life time due to those attacks have been the subjects of many studies throughout the last decades. The consequences of the attack of these aggressive agents, in the functionality of the concrete structure, is the corrosion of the reinforcement. Responsible for the loss of billions dollar, understanding and fighting against the effects of corrosion has been a great challenge for engineering. This work studied the process of hot dip galvanization for the protection of rebar in concrete structures. The main goal was to reinforce the feasibility of this system, which is already widely used for metallic structures, but little implemented in concrete structures, especially in Brazil.