Accelerated Testing for Concrete Reinforcing Bar Corrosion Protection Systems

混凝土钢筋腐蚀防护系统的加速测试

• 批准号: 9812716
• 负责人: David Darwin
• 金额: $ 17万
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-02-15 至 2003-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9812716&HistoricalAwards=false
• 关键词: Accelerated; Testing; Concrete; Reinforcing; Bar

The goal of the current study is to develope a detailed correlation between accelerated laboratory test and field performance for a broad range of corrosion protection systems. The study, carried out in partnership wiith the Kansas Department of Transportation and the manufactures of corrosion protection systems, takes advantage of ongoing state and university surveys in northeast Kansas evaluating the performance of bridge decks. The study includes the evaluation and modification of laboratory test procedures to establish those that provide the best match with the corrosion behavior of reinforced concrete bridge decks subjected to normal and accelerated exposure. The corrosion evaluation techniques address the protection provided by epoxy-coated bars, correction inhibiting admixtures, corrosion-resistant steel, the effects of different deicers, and modifications in concrete mix proportions. The field test platforms are subjected to corrosion environments matching those of the bridge and to aggressive corrosion environments matching those obtained in the labortory. Direct correlation of corrosion performance will allow more effective and rational evaluation techniques to be instituted. The final result will be more efficient selection procedures, more rapid movement of corrosion technology into practice, the extension of structure service life, and the overall reduction in the repair and rehabilitation cost associated with chloride induced corrosion in reinforced concrete structures.

目前研究的目标是为广泛的腐蚀防护系统开发加速实验室测试和现场性能之间的详细相关性。这项研究是与堪萨斯交通部和防腐系统制造商合作进行的，它利用了堪萨斯东北部正在进行的评估桥面性能的州和大学调查。该研究包括评估和修改实验室测试程序，以建立那些提供最佳匹配的钢筋混凝土桥面受到正常和加速暴露的腐蚀行为。腐蚀评估技术解决了环氧涂层钢筋提供的保护，纠正抑制外加剂，耐腐蚀钢，不同的除冰剂的影响，并在混凝土配合比的修改。现场试验平台经受与桥梁腐蚀环境相匹配的腐蚀环境和与实验室中获得的腐蚀环境相匹配的侵蚀性腐蚀环境。腐蚀性能的直接相关性将允许更有效和合理的评估技术被制定。最终的结果将是更有效的选择程序，更快速的移动到实践中的腐蚀技术，延长结构的使用寿命，并在钢筋混凝土结构中与氯离子引起的腐蚀相关的维修和恢复成本的整体降低。