Control of Concrete Cracking in Bridges (2017) / Chapter Skim
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Pages 54-60
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From page 54... ...
54 One of the intents of providing concrete cover to steel reinforcement is to protect the reinforcement from direct contact with materials that will cause corrosion, such as saltwater and deicing chemicals. If cracks occur, that protection is lost, and this is the concern that owners have, particularly for bridge decks and substructures.
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From page 55... ...
55 of cracks and evaluate the impact of cracking on service life. No delaminations or spalls were found in bridge decks constructed with epoxy-coated reinforcement.
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56 of elasticity of the FRP reinforcement, which may be resulting in increased cracking of the bridge deck surface. The few FRP decks included in this study used different materials and design.
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57 deTermInaTIon of Bar SPacIng To conTrol crack WIdTHS Over the years, different equations have been developed for the calculation of crack widths in concrete components (Modjeski and Masters et al.
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58 where wcu = maximum crack width for uncoated reinforcement (in.) ; fs = stress in steel reinforcement (ksi)
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From page 59... ...
59 A rearrangement of the equation 23 results in s f d e r s ss c 700 2 (25) = g gb − With gr = 1.0, this equation becomes equation 5.6.7-1 (formerly 5.7.3.4-1)
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From page 60... ...
60 According to Nair et al.
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