Treatment of Reinforcing Bars During Construction of Concrete Structures to Prevent Corrosion

混凝土结构施工过程中钢筋的防腐处理

• 批准号: 9060112
• 负责人: Nancy Kackley
• 金额: $ 5万
• 依托单位: GINER, INC.
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-01-01 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9060112&HistoricalAwards=false
• 关键词: Treatment; Reinforcing; Bars; During; Construction

The corrosion of steel reinforcing bars in concrete structures is a problem with multi-million dollar impact in both the private and public sectors. Chloride intrusion from natural (seawater or marine environments) or man-made (deicing salts) sources contributes to the breakdown of the protective iron oxide film on the steel. The subsequent reactions create voluminous corrosion products, causing cracking and spalling of the overlying concrete and reducing the effective strength of the entire structure. In the proposed program, an electrochemical method for enhancing the corrosion resistance of the rebar during the initial concrete curing period will be investigated. The method is in situ passivation of the rebar surface by application of an anodic potential. This treatment will enhance the protective iron oxide film on the rebar by making it thicker and more uniform. The effectiveness of this treatment in enhancing the corrosion resistance of rebar will be evaluated in simulated environments and in mortar-rebar samples.

混凝土结构中钢筋的腐蚀是 这是一个对私人和 公共部门。 来自天然（海水或 海洋环境）或人造（除冰盐）源 有助于破坏保护性的氧化铁膜， 钢铁 随后的反应产生大量的腐蚀 产品，导致上面的混凝土开裂和剥落 并降低整个结构的有效强度。 在 所提出的方案，电化学方法，提高 混凝土初期钢筋的抗腐蚀性 将研究固化时间。 该方法是在原位 钢筋表面的阳极钝化 潜力 这种处理会增强氧化铁的保护作用 通过使其更厚和更均匀来在钢筋上形成膜。 的 这种处理在增强腐蚀方面的有效性 钢筋的阻力将在模拟环境中进行评估， 砂浆钢筋样本