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FIELD EVALUATION OF CONCRETE BRIDGE DECKS REINFORCED WITH EPOXY-COATED STEEL IN INDIANA.
| 题名： | FIELD EVALUATION OF CONCRETE BRIDGE DECKS REINFORCED WITH EPOXY-COATED STEEL IN INDIANA. |
| 作者： | Hasan-HO; Ramirez-JA; Cleary-DB |
| 关键词： | CONCRETE-BRIDGE-DECKS; STEEL-REINFORCEMENT; EPOXY-COATINGS; FIELD-STUDIES; CONDITION-SURVEY; DELAMINATION-; SPALLING-; CRACKING-FRACTURING; CORE-ANALYSIS; COMPRESSIVE-STRENGTH; UNIT-WEIGHT; CHLORIDE-CONTENT; CORROSION-; INDIANA- |
| 摘要： | A field evaluation of a representative sample of six bridges in terms of traffic and environmental and salt exposure conditions was conducted to assess the in-service condition of concrete bridge decks reinforced with epoxy-coated steel in Indiana. The field condition assessment included (a) identification of any delaminated and spalled areas; (b) detailed mapping of the observed cracking; (c) identification of the concrete cover and the underlying reinforcement; (d) core sampling with and without reinforcement to determine the compressive strength and unit weight; and (e) concrete powder sampling to determine chloride concentration at various depths. No signs of steel corrosion were found in the bar samples extracted from cores in the six bridges evaluated. The chloride concentration levels at the level of the reinforcement for all but two of the bridges were well above the commonly accepted threshold value at the level of the reinforcement. Evaluaton of the field data revealed that, to date, the combination of adequate concrete cover and epoxy coating has provided a good corrosion protection system in Indiana. The sample included the first bridge in Indiana on which epoxy-coated reinforcement was used (1976). |
| 总页数： | Transportation Research Record. 1995. (1476) pp155-161 (5 Fig., 3 Tab., 7 Ref.) |
| 报告类型： | 科技报告 |
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