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SERVICE LIFE EVALUATION OF CONCRETE SURFACE COATINGS.
| 题名： | SERVICE LIFE EVALUATION OF CONCRETE SURFACE COATINGS. |
| 作者： | Zemajtis-J; Weyers-RE |
| 关键词： | CONCRETE-BRIDGES; BRIDGE-SUBSTRUCTURES; SURFACE-TREATMENTS; COATINGS-; CORROSION-PROTECTION; LABORATORY-STUDIES; EPOXY-; URETHANES-; METHYLMETHACRYLATE-; EXPOSURE-; SALT-WATER; DEICING-SALT; HORIZONTAL-; VERTICAL-; TIDAL-EXPOSURE-ZONE; UNDERWATER-; SERVICE-LIFE; CHLORIDES-; DIFFUSION-; EQUATIONS- |
| 摘要： | The use of surface coatings for concrete bridge substructures is one of the methods used as corrosion protection. The results of a 1-year laboratory study on three generic coatings, epoxy, urethane, and methyl methacrylate (MMA), are presented. Specimens were built to simulate four exposure conditions typical for concrete bridges located in the coastal region or inland where deicing salts are used. The exposure conditions were horizontal surface, vertical surface, tidal zone, and immersion zone. The service life of each coating was estimated on the basis of chloride ion diffusion through the coating and concrete. The diffusion equation for the condition that the surface chloride concentration changes as a function of the square root of time was used to estimate the service lives of the coatings for various component exposure conditions and the range of environmental exposure conditions in the United States. |
| 总页数： | Transportation Research Record. 1995. (1490) pp67-74 (6 Fig., 9 Tab., 8 Ref.) |
| 报告类型： | 科技报告 |
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