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Accelerated testing of plain and epoxy-coated reinforcement in simulated seawater and chloride solutions
To simulate marine and bridge deck environments, plain and epoxy-coated reinforcing steel bars were cast in concrete slabs and exposed in the laboratory to synthetic seawater and 3% sodium chloride solution. They were monitored on a regular basis using the linear polarization and open-circuit potential techniques. The concrete slabs had a water to cement ratio of 0.60 and the steel reinforcement had 20 mm concrete cover. The epoxy-coated bars were with no damage, and 1% and 2% damage to the coating. A 2-year monitoring program indicated that the corrosion current density was negligible for epoxy-coated bars with no damage to the coating regardless of the exposure conditions and that undamaged epoxy-coated bars provided excellent performance in preventing corrosion activity in reinforced concrete structures subjected to a chloride environment. Similarly, rebar with damaged epoxy coating gave no evidence that sufficient rust had accumulated at the steel/concrete interface to cause the concrete cover to crack.
Accelerated testing of plain and epoxy-coated reinforcement in simulated seawater and chloride solutions
To simulate marine and bridge deck environments, plain and epoxy-coated reinforcing steel bars were cast in concrete slabs and exposed in the laboratory to synthetic seawater and 3% sodium chloride solution. They were monitored on a regular basis using the linear polarization and open-circuit potential techniques. The concrete slabs had a water to cement ratio of 0.60 and the steel reinforcement had 20 mm concrete cover. The epoxy-coated bars were with no damage, and 1% and 2% damage to the coating. A 2-year monitoring program indicated that the corrosion current density was negligible for epoxy-coated bars with no damage to the coating regardless of the exposure conditions and that undamaged epoxy-coated bars provided excellent performance in preventing corrosion activity in reinforced concrete structures subjected to a chloride environment. Similarly, rebar with damaged epoxy coating gave no evidence that sufficient rust had accumulated at the steel/concrete interface to cause the concrete cover to crack.
Accelerated testing of plain and epoxy-coated reinforcement in simulated seawater and chloride solutions
Erdogdu, S. (author) / Bremner, T.W. (author) / Kondratova, I.L. (author)
Cement and Concrete Research ; 31 ; 861-867
2001
7 Seiten, 20 Quellen
Article (Journal)
English
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