Construction and Building Materials · 2021 · 41 citations · 22 references
EngineeringMaterials EngineeringMaterials ScienceCorrosion ScienceOffshore EngineeringStructural MaterialsAtmospheric Marine CorrosionCorrosion In ConcreteCorrosion Of Construction MaterialsCorrosion ProtectionCorrosion ResistanceCorrosion-resistant MaterialsChloride ContentChloride Ingress AssessmentChloride-induced CorrosionCracksField Exposure StudiesField Exposure TestingReinforced Concrete CorrosionReinforcement Corrosion
The state of corrosion of three pre-cracked concrete beams was investigated after 25 years of marine exposure (atmospheric, tidal and submerged). The influence of inadequate plastic spacers was found to overrule the possible impact of bending cracks on reinforcement corrosion. Increased chloride ingress was detected in cracked areas, but very little corrosion was observed where cracks reached the reinforcement. Also, high chloride content was measured in uncracked parts of the beams, but no or very limited corrosion was observed outside spacers and a few cracks. It is hypothesised that corrosion, initiated early at weak spots (here at plastic spacers) can protect the remaining reinforcement from corrosion.
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Ueli Angst, Mette Rica Geiker, Alexander Michel et al. · Materials and Structures · 2017 · 268 citations · Full text