CARBONATION INDUCED CORROSION OF REINFORCEMENT
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Published:2002
G C Bouquet, 2002. "CARBONATION INDUCED CORROSION OF REINFORCEMENT", Challenges of Concrete Construction: Volume 3, Repair, Rejuvenation and Enhancement of Concrete: Proceedings of the International Seminar held at the University of Dundee, Scotland, UK on 5–6 September 2002, Ravindra K. Dhir, M. Roderick Jones, Li Zheng
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The Dutch Cement Industry (ENCI) has developed a physical model, which simulates the carbonation induced corrosion of reinforcement. Important input variables for the model are parameters describing the climate conditions. For outdoor concrete the duration of contact with water (rain) and the frequency are determining factors for the occurrence of carbonation-induced corrosion of the reinforcement. For the extreme climate conditions: no wetting (indoor concrete) and no drying (under water concrete) corrosion do not occur. The reinforcement will only corrode when the concrete directly in contact with the reinforcement bar is intermitted dry and wet. The results of the calculations show that the value of the diffusion coefficient for CO2 or the density of the concrete has little influence on the corrosion of the reinforcement. The model clearly illustrates that simple laboratory experiments on measuring the carbonation depth of indoor exposed concrete with or without an increased partial CO2 pressure are irrelevant for determining the onset of corrosion of the reinforcement.
INTRODUCTION
INITIATION PERIOD
PROPAGATION PERIOD
CALCULATION OF SERVICE LIFE
CONCLUSIONS
REFERENCES
