RELATIVE HUMIDITY ON THE CORROSION IN REINFORCED CONCRETE STRUCTURES 

Permeability is one of the important indications of the proposed durability of concrete. Concrete that is less permeable will allow the propagation phase of corrosion to extend over a longer period of time, allowing the structure to remain stable over its design life. The oxygen permeability index test was used to understand the permeability of specimens with different parameters and to compare the results of concrete with and without cover (Figure 3-13). The cover and no cover comparison is vital in analysing how the OPI test method differs from real life situations.

 

 

After curing, the specimens were cut to size and then placed in an oven at 50 ± 2°C for seven days. After seven days, the concrete discs were removed from the oven and were allowed to cool for two to four hours. This cooling was carried out in a room experiencing ambient conditions.

Four discs were required to perform each test. The diameters of each disc were accurately measured before being placed in the compressible collar, with the test face at the bottom