CORROSION OF FUSION-BONDED EPOXY COATED BARS IN CHLORIDE-CONTAMINATED PLAIN AND SiLICA FUME CEMENT CONCRETES EXPOSED TO VARYING TEMPERATURE
Fusion bonded epoxy coated (FBEC) bars are being utilized by the construction industry in several regions of the world to minimize corrosion damage to the reinforced concrete structures. While the use of FBEC bars in concrete is debated among the concrete technologists, contractors and owners are us...
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| التنسيق: | article |
| منشور في: |
2020
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| الوصول للمادة أونلاين: | https://eprints.kfupm.edu.sa/id/eprint/136066/1/maslehuddin_CORROSION_FUSION-BONDED_EPOXY_COATED_BARS_CHLORIDE-CONTAMINATED_PLAIN_AND_SiLICA_FUME_CEMENT.pdf |
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| الملخص: | Fusion bonded epoxy coated (FBEC) bars are being utilized by the construction industry in several regions of the world to minimize corrosion damage to the reinforced concrete structures. While the use of FBEC bars in concrete is debated among the concrete technologists, contractors and owners are using them as one of the methods to enhance the useful service-life of reinforced concrete construction. Several studies have been conducted at King Fahd University of Petroleum and Minerals to develop methodologies for enhancing concrete durability under severe environmental conditions of the region. One of the studies has been to evaluate the usefulness of FBEC bars under local conditions, which are characterized by high chloride contamination in concrete and elevated environmental temperature. The effect of high chloride concentration and elevated temperature in conjunction with damage to the FBEC on the corrosion of the substrate metal was studied in plain and silica fume cement concretes. The corrosion current density on mild steel and damaged FBEC bars was noted to increase with an increase in temperature. The performance of FBEC bars in the silica fume cement concrete was better than that in the plain cement concrete at both normal and elevated temperatures. The long-term performance of FBEC bars was satisfactory at elevated temperatures in the silica fume cement concrete specimens even with up to 2% chloride, by weight of cement. |
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