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CONCRETE BRIDGE PROTECTION AND REHABILITATION: CHEMICAL AND PHYSICAL TECHNIQUES. CORROSION INHIBITORS AND POLYMERS.
| 题名： | CONCRETE BRIDGE PROTECTION AND REHABILITATION: CHEMICAL AND PHYSICAL TECHNIQUES. CORROSION INHIBITORS AND POLYMERS. |
| 作者： | Al-Qadi-IL; Prowell-BD; Weyers-RE; Dutta-T; Gouru-H; Berke-N |
| 关键词： | CONCRETE-BRIDGES; REHABILITATION-; CORROSION-PREVENTION; BRIDGE-MAINTENANCE; CHLORIDES-; ASPHALT-PORTLAND-CEMENT-CONCRETE-COMPOSITE; CONCRETE-DURABILITY; CONCRETE-CURING; PORTLAND-CEMENT-CONCRETE; STRATEGIC-HIGHWAY-RESEARCH-PROGRAM |
| 摘要： | This report deals with the improvement of existing non-electrochemical methods for protecting and rehabilitating chloride-contaminated concrete with and without concrete removal and with the development of new methods. Existing methods include deep impregnation of the concrete with a polymer or with calcium nitirite, and the new methods include corrosion inhibitor application processes and a resin concrete asphalt composite material. Field data suggest that the deep polymer impregnation can increase the service life of corrosion deteriorating decks by at least 30 years. Two methods of impregnating calcium nitite were examined in the field. In the laboratory polymer impregnated concrete was compared to other protection techniques. Five corrosion inhibitors were evaluated in the laboratory. Asphalt Portland Cement Concrete Composite (APCCC) material was designed and evaluated for physical properties and durability characteristics for different moist and dry curing periods. APCC showed higher strength properties and resistance to freeze thaw and stripping than hot mix asphalts. It also was more resistant to chloride intrusion than portland cement concrete. It is suggested that this material be used to rehabilitate existing bridge decks with hot mix asphalt preformed membrane protection systems. |
| 总页数： | 1993/07. pp248 (Figs., Tabs., Refs., 3 App.) |
| 报告类型： | 科技报告 |
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