Durability of High Performance Concrete

高性能混凝土的耐久性

• 批准号: 06452258
• 负责人: FUJII Manabu
• 金额: $ 4.74万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452258/
• 关键词: High Porformance Concrole; Limestone Powdor; Drying Shrinkage; Creep; Mass Transportation; Darability; 高流動コンクリート; 石灰石微粉末; 乾燥収縮; クリープ; 物質透過性; 耐久性; 硬化コンクリート; 高炉スラグ微粉末; 細孔構造; 付着

In this study, durability of high performance concrete, which has relatively normal strength, was examined. Main results obtained are as follows :(1) Strain of drying shrinkage of high performance concrete was not affected by replacement ratio of lime stone powder and water cement ratio, although it was a little larger than that of ordinary concrete. It may be caused by change in pore structure due to lime stone powder addition. Creep strain and creep coefficient were also almost constant regardless of water cement ratio, which were almost the same as those of ordinary concrete.(2) Hight performance concrete showed preferable freeze thaw resistance except for that with 3.0% of air content. Influence of the agent which gives high viscosity was not significant.13EA04 : (3) Vickers hardness of interfacial zone of high performance concrete and steel bar showed large values in case that lime stone powder was used and water powder ratio was small, which may be caused by small bleeding. Bond strength between high performance concrete and steel bar was almost the same regardless of the direction of steel bar when casting.

在这项研究中，研究了具有相对正常强度的高性能混凝土的耐久性。主要结果如下：(1)高性能混凝土的干燥收缩应变虽然比普通混凝土略大，但不受石灰石粉替代率和水灰比的影响。可能是由于添加石灰石粉导致孔隙结构发生变化所致。无论水灰比如何，蠕变应变和蠕变系数也几乎恒定，与普通混凝土几乎相同。(2)除含气量为3.0%的高性能混凝土外，高性能混凝土表现出较好的抗冻融性能。高粘度剂的影响并不显着。13EA04：（3）在使用石灰石粉且水粉比例较小的情况下，高性能混凝土与钢筋界面区的维氏硬度显示出较大的值，这可能是少量出血引起的。无论浇注时钢筋的方向如何，高性能混凝土与钢筋之间的粘结强度几乎相同。

项目成果

小林孝一,服部篤史,宮川豊章 藤井学: "石灰石微粉末を混入したセメントペーストと骨材の骨面性状" セメント-コンクリート論文集. 49. 420-425 (1995)

Koichi Kobayashi、Atsushi Hattori、Toyoaki Miyakawa、Manabu Fujii：“掺有细石灰石粉的水泥浆和骨料的骨表面特性”《水泥混凝土杂志》49. 420-425 (1995)。

小林孝一,久米生泰,宮川豊章 藤井学: "石灰石微粉末を用いた高流動コンクリートの微小硬度と付着性状" 第2回超流動コンクリートに関するシンポジウム論文集. 149-156 (1994)

Koichi Kobayashi、Yasushi Kumeo、Toyoaki Miyakawa、Manabu Fujii：“使用细石灰石粉的高流动性混凝土的显微硬度和粘合性能”第二届超流混凝土研讨会论文集149-156（1994）。