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07282 THE EFFECT OF CRACKING ON REINFORCEMENT CORROSION IN CONCRETE BRIDGE DECKS

Picture for 07282 THE EFFECT OF CRACKING ON REINFORCEMENT CORROSION IN CONCRETE BRIDGE DECKS
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Product Number: 51300-07282-SG
ISBN: 07282 2007 CP
Author: Jacqueline M. Sansone Rummel, Klepper, Kahl LLP, and Michael C. Brown
Publication Date: 2007
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Reinforcement corrosion may compromise the safety and serviceability of a reinforced concrete structure. It is crucial to understand the causes of corrosion so that measures may be taken to guarantee the safety and service life of a structure. The results of this study pertaining to the corrosion of reinforcement indicate that the percentage of surface area corroded for both bare steel and epoxy coated reinforcement increased with the presence of cracks. Also, the incidence of corrosion observed on the two types of bars is not different. For the subset of bare steel reinforcement, 90% had some observed corrosion, of which 25% was associated with a cracked core. For epoxy coated reinforcement, 85% had some corrosion, of which 25% was associated with a cracked core. The condition of the coating, i.e. number of damaged areas or the number of microscopic imperfections (holidays), is a crucial factor in the amount of corrosion. The depth of the crack was determined to be a major factor in the amount of observed corrosion in all reinforcement.
Reinforcement corrosion may compromise the safety and serviceability of a reinforced concrete structure. It is crucial to understand the causes of corrosion so that measures may be taken to guarantee the safety and service life of a structure. The results of this study pertaining to the corrosion of reinforcement indicate that the percentage of surface area corroded for both bare steel and epoxy coated reinforcement increased with the presence of cracks. Also, the incidence of corrosion observed on the two types of bars is not different. For the subset of bare steel reinforcement, 90% had some observed corrosion, of which 25% was associated with a cracked core. For epoxy coated reinforcement, 85% had some corrosion, of which 25% was associated with a cracked core. The condition of the coating, i.e. number of damaged areas or the number of microscopic imperfections (holidays), is a crucial factor in the amount of corrosion. The depth of the crack was determined to be a major factor in the amount of observed corrosion in all reinforcement.
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