Development of High Performance Concrete in a Ice Sea Environment.

冰海环境下高性能混凝土的开发。

• 批准号: 62850086
• 负责人: SAEKI Noboru
• 金额: $ 2.43万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Developmental Scientific Research
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-62850086/
• 关键词: High Performance Concrete; Freezing-Thawing; Ice Sea Environment; Corrosion; 低温脆性

The demand for concrete structure using in a offshore and ice sea environment has increased to develop the oil resources and to conserve the fishery. These environments are severe for concrete due to frost damage, salt damage and physical properties of low temperature. This report investigates the high performance concrete using in a ice sea environment. The first, the attempts to improve the resistance of frost damage were performed by water-cement ratio and admixtures such as silica fume, slag and fly ash. The second, a new index was suggested for controlling and protecting reinforced concrete from corrosion and the allowable stress for reinforcing bars to improve the resistance of corrosion damage was defined by the required amount of concrete cover. The third, impact strength under low temperature was carried out by Charpy impact test and dropping test. The brittle behaviour under low temperature was discussed and it is found that the impact strength of low temperature was a little difference in normal temperature by controlling water-cement ratio and stress propagation in low temperature was more rapid than in normal temperature.

为了开发石油资源和保护渔业资源，近海和冰海环境对混凝土结构的需求日益增加。由于混凝土的冻害、盐害和低温物理特性，这些环境对混凝土来说是严峻的。本文研究了高性能混凝土在冰海环境中的应用。首先，通过水灰比和硅灰、矿渣、粉煤灰等掺合料来提高混凝土的抗冻性。第二，提出了一个新的控制和保护钢筋混凝土免受腐蚀的指标，并根据混凝土保护层的要求确定了钢筋的容许应力，以提高钢筋的抗腐蚀能力。第三，通过夏比冲击试验和跌落试验研究了复合材料的低温冲击性能。研究了低温下的脆性行为，发现通过控制水灰比，低温下的冲击强度与常温下相差不大，低温下的应力传播比常温下快。

项目成果

N.Saeki: "Control of Rust Damage of Reinforced Concrete in a Corrosive Environment" Performance of Concrete in Marine Environment, CANMET/ACI. sp-109. 163-177 (1988)

N.Saeki：“腐蚀环境中钢筋混凝土生锈损坏的控制”海洋环境中混凝土的性能，CANMET/ACI。

N. Saeki: "Performance of Concrete in Coastal and Environment" Concrete Journal of the Japan Concrete Institute. 25. 4-12 (1987)

N. Saeki：“混凝土在沿海和环境中的性能”日本混凝土协会混凝土杂志。

佐伯昇: コンクリート工学年次論文報告集. 10. 563-566 (1988)

Noboru Saeki：混凝土工程年度论文报告集 10. 563-566 (1988)。

佐伯昇: コンクリート工学. 25. 4-12 (1987)

佐伯升：混凝土工程。25. 4-12 (1987)

佐伯昇: セメント技術年報. 42. 235-238 (1988)

Noboru Saeki：水泥技术年度报告。42. 235-238 (1988)。