Accelerated testing of plain and epoxy-coated reinforcement in simulated seawater and chloride solutions


Erdogdu S. , Bremner T. W. , Kondratova I. L.

CEMENT AND CONCRETE RESEARCH, cilt.31, ss.861-867, 2001 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 31 Konu: 6
  • Basım Tarihi: 2001
  • Doi Numarası: 10.1016/s0008-8846(01)00487-2
  • Dergi Adı: CEMENT AND CONCRETE RESEARCH
  • Sayfa Sayıları: ss.861-867

Özet

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. (C) 2001 Elsevier Science Ltd. All rights reserved.