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Influence of binder type on the durabilityof reinforced concrete structures

Reinforcement corrosion reduction


Cement extenders such fly ash, slag and silica fume can dramatically reduce the rate of corrosion of reinforcing steel in cracked concrete. The presence of a transverse crack in reinforced concrete specimens, subjected to cycles of wetting and drying with a chloride solution to simulate a marine environment, resulted in rapid initiation of corrosion of the steel at the location of the crack. The initiation period was essentially negated and active corrosion started within a few weeks of testing. The protection afforded the embedded reinforcing steel was the increase in resistivity of the concrete, associated with the inclusion of cement extenders, which resulted in a reduction in the overall rate of corrosion.

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CPi worldwide journals are trade journals for the concrete and precast concrete industry that are published in 10 different language editions in more than 170 countries. These trade journals, with their practical editorial reporting on research, production and applications, are specifically addressing the decision makers of the concrete and precast concrete industry.

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