Repair of Chloride deterioratron of Concrete Structures by Electro-Chemical Chloride removal

电化学除氯修复混凝土结构的氯化物劣化

• 批准号: 05555123
• 负责人: FUJII Manabu
• 金额: $ 12.74万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research (B)
• 财政年份: 1993
• 资助国家: 日本
• 起止时间: 1993 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-05555123/
• 关键词: Desalination; Chloride Ion; Beam; Flexral Failure; Shear Failure; Wrap splice; Bond Strength; 電気化学的塩化物除去; 塩害; コンクリート構造物; アルカリ金属イオン; 付着; 鉄筋; 最大付着応力度

In this study, influence of desalination on load carrying behavior of reinforced concrete beam was investigated. Main results obtained from this study are as follows :(1) Flexural load bearing capacity of the beam, which was designed to fail in flexural mode with shear reinforcement arranged and the concrete of which included chloride ion 8.0kg/m^3 did not affected by eight weeks desalination treatment, although deflection at maximum load was enlarged.(2) Strength and deflection of the beam which was designed to fail in shear failure without shear reinforcement significantly increased by eight weeks desalination treatment. This may be caused by degradation of bond strength between concrete and steel bar due to desalination and consequently ideal tide arch mechanism was initiated.(3) The beam with wrap splice showed decrease in strength with eight weeks desalination application.

在这项研究中，研究了海水淡化对钢筋混凝土梁承载性能的影响。本研究得到的主要结果如下：（1）设计为在布置抗剪钢筋时以弯曲模式破坏的梁的弯曲荷载能力，其中氯离子含量为8.0kg/m^3的混凝土经过8周的脱盐处理，虽然最大荷载挠度有所增大，但没有受到影响。（2）设计为在不设剪力筋的剪切破坏模式下破坏的梁的强度和挠度显着增加了8周。 周海水淡化处理。这可能是由于海水淡化导致混凝土和钢筋之间的粘结强度下降，从而引发了理想的潮汐拱机制。(3)带缠绕拼接的梁在海水淡化应用八周后表现出强度下降。

项目成果

上田隆雄、宮川豊章、藤井学、芦田公伸: "デザリネーションが鉄筋の付着挙動に与える影響" コンクリート工学年次論文報告集. 16. 1007-1012 (1994)

Takao Ueda、Toyoaki Miyakawa、Manabu Fujii、Kiminobu Ashida：“设计对钢筋粘附行为的影响”混凝土工程年度报告 16. 1007-1012 (1994)。

Takao Ueda, Atsushi Hattori, Susumu Ioue, Toyoaki Miyagawa, Manabu Fujii, Masanobu Ashida: "Influence of Desalination on Bond Beharior between Conctote and Beinoforcing Stool" Proc. of Intl. Conf. on Concrete ander Severed Conditions. 625-634 (1995)

Takao Ueda、Atsushi Hattori、Susumu Ioue、Toyoaki Miyakawa、Manabu Fujii、Masanobu Ashida：“海水淡化对 Conctote 和 Beinoforcing Stool 之间债券行为的影响”Proc。