A study on the relationship between the ITZ (Interfacial Transition Zone) and steel corrosion in RC structures.

RC结构中ITZ（界面过渡区）与钢材腐蚀关系的研究。

• 批准号: 15560399
• 负责人: HAMADA Hidenori
• 金额: $ 2.05万
• 依托单位: Port and Airport Research Institute, Independent Administrative Institution
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2004
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-15560399/
• 关键词: RC structure; Steel-concrete interface; Steel corrosion; Corrosion tendency; Corrosion rate; Chloride attack; Chloride threshold value; Interface improvement

In this study, several series of experimental works were carried out.From these series of experimental works, the following research results can be obtained.(1)By fresh concrete breeding, voids are easily formulated at steel-concrete interface.(2)Steel corrosion in concrete is greatly affected by the steel-concrete interface.(3)As interface voids become larger, steel corrosion clearly becomes heavier.(4)Steel corrosion in concrete initiate at the void of steel-concrete interface.(5)As interface voids become larger, the chloride threshold value or corrosion initiation becomes smaller.(6)By applying the cement paste on steel surface before concrete casting, voids at steel-concrete interface become very small.

在本研究中，进行了几个系列的实验工作。从这一系列的实验工作中，可以得到以下研究结果：(1)新拌混凝土容易在钢-混凝土界面形成孔洞。(2)钢筋在混凝土中的腐蚀受钢-混凝土界面的影响较大。(3)随着界面空隙的增大，钢的腐蚀明显加重。(4)钢筋在混凝土中的腐蚀起始于钢-混凝土界面空隙处。(5)随着界面空隙的增大，氯化物阈值或腐蚀起始值变小。(6)在混凝土浇筑前在钢表面涂上水泥浆，使钢-混凝土界面的空隙变得很小。

项目成果

Performance of seawater-mixed concrete in the tidal environment

• DOI: 10.1016/j.cemconres.2003.09.020
• 发表时间: 2004-04-01
• 期刊: CEMENT AND CONCRETE RESEARCH
• 影响因子: 11.4
• 作者: Mohammed, TU;Hamada, H;Yamaji, T
• 通讯作者: Yamaji, T

T.U.Mohammed, 濱田秀則, 山路徹: "Concrete After 30 Years of Exposure-Part II : Chloride Ingress and Corrosion of Steel Bars"ACI Materials Journal. Vol.101 No.1. 13-18 (2004)

T.U.Mohammed、Hidenori Hamada、Toru Yamaji：“暴露 30 年后的混凝土 - 第二部分：氯化物的侵入和钢筋的腐蚀”ACI 材料杂志第 101 卷第 13-18 期（2004 年）。

Durability of Concrete Made with Different Water-Reducing Chemical Admixtures in Tidal Environment

潮汐环境下不同减水化学外加剂混凝土的耐久性

• 发表时间: 2003
• 期刊: ACI Materials Journal Vol.100 No.3
• 作者: T.U.Mohammed;濱田秀則
• 通讯作者: 濱田秀則

T.U.Mohammed, 濱田秀則: "Durability of Concrete Made with Different Water-Reducing Chemical Admixtures in Tidal Environment"ACI Materials Journal. Vol.100 No.3. 194-202 (2003)

T.U.Mohammed，Hidenori Hamada：“潮汐环境中不同减水化学外加剂制成的混凝土的耐久性”ACI 材料杂志第 100 卷第 194-202 期（2003 年）。

Concrete After 30 Years of Exposure - Part I : Mineralogy, Micro-structures, and Interface

暴露 30 年之后的混凝土 - 第一部分：矿物学、微观结构和界面

• 发表时间: 2004
• 期刊: ACI Materials Journal 101・1
• 作者: Tarek Uddin Mohammed;浜田秀則;山路徹
• 通讯作者: 山路徹