Study of Influence of Ibmperature on Durability of Reinforced Concrete

温度对钢筋混凝土耐久性影响的研究

• 批准号: 18360206
• 负责人: OTSUKI Nobuaki
• 金额: $ 10.5万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18360206/
• 关键词: Reinforced concrete; Temperature; Deterioration; Arrhenius equation; Activation energy; Corrosion speed of steel bar; Ion permeability rate; Durability

(1) It was confirmed that the corrosion rate of steel bars in concrete increased with the temperature rising. And it was confirmed that the deterioration of reinforced concrete due to the steel corrosion apparently agreed with the Arrhenius theory.(2) In addition, it became possible to construct the ionic migration system in the concrete which considers the influence of temperature by in ionic migration system (Nernst - to designate Planck system as basic system, ionic migration system which considers Debye-Huckel system which expresses influence of coexistence ion and electrical neutrality condition for judging entire ionic migration) in the concrete which is the research result of the applicant Arrenius system adding.(3) According to the results, the life time of reinforced concrete exponentially decreased with the temperature of the city increasing. Especially, it was indicated that the environment against steel corrosion in concrete from the viewpoint of temperature effect. The life time of reinforced concrete in South-East Asia became 70% of that in mild temperature environment (20℃).

(1)混凝土中钢筋的锈蚀速率随温度的升高而增大。并证实钢筋锈蚀引起的钢筋混凝土劣化明显符合Arrhenius理论。(2)此外，在混凝土中建立考虑温度影响的离子迁移体系(Nernst-将Planck体系指定为基本体系，考虑表示共存离子影响的德拜-休克尔体系和判断整个离子迁移的电中性条件)成为可能。特别是从温度效应的角度指出了混凝土中钢筋锈蚀的环境。东南亚地区钢筋混凝土的使用寿命约为温和环境下(20℃)的70%。

项目成果

Nishida Study on Applicability of Steel Slag Hydrated Matrix to Steel Reinforced Members under Marine Environment

西田钢渣水化基质在海洋环境下钢筋构件的适用性研究

• 发表时间: 2007
• 作者: T. Kimura;N. Otsuki;P. Wattanachai,T.
• 通讯作者: P. Wattanachai,T.

Corrosion Behavior of Steel Bar in Chloride Contaminated Mortars with Fly Ash

钢筋在粉煤灰氯化物污染砂浆中的腐蚀行为

• 发表时间: 2007
• 期刊: Philippine Engineering Journal 26
• 作者: Madlangbayan;M. S.;Otsuki N.;Nishida T.;Baccay M. A.
• 通讯作者: Baccay M. A.

鋼材腐食による鉄筋コンクリートの劣化の温度依存性に関するアレニウス則に基づく検討

基于阿累尼乌斯定律的钢筋腐蚀引起的钢筋混凝土劣化温度依赖性研究

• 发表时间: 2006
• 期刊: 材料と環境2006講演概要集
• 作者: 西田孝弘;大即信明;Melito A. Baccay
• 通讯作者: Melito A. Baccay

超遅延剤を用いたコンクリートの打継目の特性に関する検討

超缓凝剂混凝土浇筑缝特性研究

• 发表时间: 2007
• 作者: 浮島文香;大即信明;西田孝弘;Pitiwat Wattanachai
• 通讯作者: Pitiwat Wattanachai

Influence of Temperature on Deterioration Process of Reinforced Concrete due to Chloride Attack or Carbonation

温度对钢筋混凝土氯化物侵蚀或碳化劣化过程的影响

• 发表时间: 2006
• 期刊: Proceedings of Conference, on Inspection, Appraisal, Repairs and Maintenance of Structures 10
• 作者: Nobuaki Otsuki;Takahiro Nishida;Melito A. Baccay
• 通讯作者: Melito A. Baccay