The durability of reinforced concrete plays an important role in making sure that reinforced concrete structures do not deteriorate and fail in their intended lifespan. It will be more beneficial for owners to spend more money on initial quality than spending large amounts of money on maintenance over the intended lifespan. This is however based on an assurance of improved durability (Alexander, Ballim, & Stanish, 2008).
The required durability is based on the design service life of a reinforced concrete structure. This service life is established during the design process and can vary for different structures. The design life takes into account the environmental conditions and required maintenance. With regard to reinforced concrete structures, the durability relates largely to the outer cover layer of the concrete. The responsibility to achieve a good quality cover of concrete falls onto both the concrete material supplier and the constructor.
There are many factors that will cause reinforced concrete to deteriorate, but for this research paper a large focus was put on the effects of the corrosion mechanism. It is almost impossible to prevent the exposure of reinforced concrete structures to the natural environment. The study looked at the premature deterioration of reinforced concrete in relation to the causes and effects of corrosion.
The durability index tests of oxygen permeability and water sorptivity are carried out in order to monitor the effects of relative humidity on the transport mechanisms of permeation and sorption. Further details on the durability index tests can be found through the Concrete Materials and Structural Integrity Research Unit at the University of Cape Town (COMSIRU).