Study on Durability of Concrete Structures Contained Low Quality Aggregates

低质骨料混凝土结构耐久性研究

• 批准号: 60550335
• 负责人: YOSHINO Akira
• 金额: $ 1.22万
• 依托单位: Tottori University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-60550335/
• 关键词: Low quality aggregate; Durability; reinforced concrete; Alkali aggregate reaction; Weathered granite; 耐震特性; 鉄筋コンクリート

Recentry, there is the shortage of high quality aggregate such as river sand, and there are some attempts to utilize some kinds of biproducts to the aggregate of concrete. So the cases that the low quality aggregates are used for concrete will increase.In this study, experimental investigations on the properties of concrete which containes low quality aggregates such as fine aggregate made from the crushed weathered granite , recycled coarse aggregate prepared by crushing old concrete and reactive aggregate, are performed.Mechanical properties and durability of concrete contained these aggregate were studied and at the same time, dynamic behaviours of reinforced concrete contained these aggregates were investigated.Mechanical properties of these concrete were almost the same as these of normal concrete made of high quality aggregate. But as for durability, some kinds of these concrete contained low quality aggregate showed quite low resistance to the repeats of freezing and thawing actions and this can not be improved by air entrainment.Dynamic behaviors of reinforced concrte beams made of low quality aggregate were not inferior to those of normal reinfored concrete beams, and there found the cases that the capacity of shear failure of reinforced concrete beam contained reactive aggregate were improved by the expansion of concrete caused by alkali-aggregate reaction. But to conform these phenomena in the actual circumstance, it is necessary to investigate for more long term test.

最近，缺乏高质量的骨料，例如河岸，并且有一些尝试利用混凝土骨料来利用某种两种两种双子动物。因此，在这项研究中，将低质量聚集体用于混凝土的情况将增加。在这项研究中，对混凝土的性能进行了实验研究，其中包含低质量的聚集体，例如由粉碎的风化花岗岩制成的细骨料，通过粉碎旧的混凝土和反应性的特性和均匀的含量的混凝土和反应性的混凝土，这些混凝土和反应性均匀的特性，这些混凝土均具有混凝性，这些混凝性的凝聚力和混凝性，这些混凝性均具有混凝性，这些混凝性均具有混凝性，这些均具有混凝性的凝聚力，这些凝聚力是混凝土的，研究了这些聚集体的钢筋混凝土的行为。这些混凝土的机械特性几乎与由高质量骨料制成的正常混凝土相同。但是至于耐用性，某些这种混凝土含有低质量的骨料表明，对冻结和融化动作的重复的抵抗力较低，空气夹带无法改善。强化的混合束的动态行为低质量的骨料骨料不符合正常的凸起的束缚，并且在其上没有正常的凸起的束缚，并在其上构成了正常的混凝土，并没有散发出的混凝土，并没有造成混凝土的混凝土，并没有范围。由碱性凝集反应引起的混凝土膨胀得到改善。但是，要在实际情况下构成这些现象，有必要调查更长期的测试。

项目成果

K Yamura, S Nishibayashi and K Torigai: "Study on the Effects of Testing Conditions on Alkali Aggregate Reaction" Proceedings of JCI 9th Conference. (1987)

K Yamura、S Nishibayashi 和 K Torigai：“测试条件对碱聚集反应影响的研究”JCI 第九次会议论文集。

S Hishibayashi, A Yoshino, K Torigai and T Yoshida: "Study on Estimation of Reactivity of Aggregate" Proceedings of JSCE Chugoku-Shikoku Branch Annual Meeting. 375-376 (1986)

S Hishibayashi、A Yoshino、K Torigai 和 T Yoshida：“骨料反应性估计研究”JSCE 中国-四国分会年会论文集。

矢村潔,吉野公: 第42回土木学会年次学術講演会講演概要集. 第5部. (1987)

Kiyoshi Yamura，K. Yoshino：第 42 届日本土木工程师学会学术年会摘要集第 5 部分。（1987 年）

林昭高,西林新蔵,矢村潔: 第41回土木学会年次学術講演会構演概要集. 第5部. 595-596 (1986)

Akitaka Hayashi、Shinzo Nishibayashi、Kiyoshi Yamura：日本土木工程师学会第 41 届年度学术讲座摘要第 5 部分。595-596 (1986)。

矢村潔,西林新蔵,鳥飼一吉: コンクリート工学年次講演会論文集. 9. (1987)

Kiyoshi Yamura、Shinzo Nishibayashi、Kazuyoshi Torikai：混凝土工程年会论文集 9。（1987）。