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

基本信息

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

项目摘要

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.

当前研究的目的是开发多种腐蚀保护系统的加速实验室测试与现场性能之间的详细关联。这项研究是在堪萨斯州运输部和腐蚀保护系统制造的合作伙伴关系中进行的，它利用了堪萨斯州东北部的州和大学调查，评估了桥梁甲板的性能。该研究包括对实验室测试程序的评估和修改，以建立那些与正常和加速暴露的钢筋混凝土桥甲板的腐蚀行为提供最佳匹配的方法。腐蚀评估技术涉及环氧涂层棒提供的保护，校正抑制剂，耐腐蚀的钢，不同的脱水剂的作用以及混凝土混合物比例的修饰。野外测试平台受到腐蚀环境，与桥梁的腐蚀环境以及与在Labortory中获得的腐蚀环境相匹配的腐蚀环境。腐蚀性能的直接相关性将允许建立更有效，更合理的评估技术。最终结果将是更有效的选择程序，将腐蚀技术的更快移动到实践中，结构使用寿命的延长以及与氯化物诱导的耐加固混凝土结构腐蚀相关的维修和康复成本的总体降低。