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Concrete In Australia : September 2013
Concrete in Australia Vol 39 No 3 51 stable, although they are also susceptible to water ingress from the top. It is considered that the observed potential variations could be related to the different humidity conditions to which the electrodes are subjected and at this stage the lack of maturity of the material embedding the electrodes in the concrete. More realistic results would be expected to be generated, after the repair mortar has reached equilibrium conditions with the repaired element and the surrounding environment. ese early measurements should only be taken as base readings, as they cannot be interpreted at this stage with respect to the corrosion status of steel reinforcement. It is expected that the potentials will become more positive with time. Several monitoring measurements are required over a period of time, including warmer periods to clarify the trend of potential changes in the concrete, after which a more reliable assessment of the corrosion status of the reinforcement could be made. 7.0 MONITORING OF COMBINED REPAIR SYSTEM OF REINFORCED CONCRETE JACKETS AND ENCASED GALVANIC ANODES AT QUEEN STREET BRIDGE -- MARINE EXPOSURE A combined repair system of reinforced concrete jackets and encased galvanic anodes was used in the four piers of Figure 8. Half-cell potentials of retaining wall on east side of the road. Figure 9. Half-cell potentials of retaining wall on west side of the road.