Proposal of Sustainable Recycle System of High Quality Recycled Aggregate with Blast-furnace Slag Cement

高炉矿渣水泥优质再生骨料可持续回收体系的建议

• 批准号: 21760345
• 负责人: HOSODA Akira
• 金额: $ 2.91万
• 依托单位: Yokohama National University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21760345/
• 关键词: コンクリート; 持続可能; 高炉セメント; 再生骨材; リサイクル; ひび割れ

In this research, in order to contribute to sustainable recycle system of high quality recycled aggregate with blast-furnace slag cement, how to improve crack resistance of slag cement concrete was investigated.The main results of this study are as shown below.(1) The effectiveness of the use of lightweight fine aggregate to reduce shrinkage of concrete and to improve crack resistance of slag cement concrete was exhibited.(2) The method to analyze microcrack around aggregate with Acoustic Emission Method was established. AE technique was utilized for very early age concrete under high temperature history. The mechanism of the generation of microcracking was clarified and the properties of microcracking were examined in detail.(3) The method to analyze microcrack of externally restrained concrete with AE was developed. The cracking strength of restrained specimens was much lower than the tensile strength of unrestrained specimens. The reason was investigated with AE analysis.

在这项研究中，为了为可持续的回收系统做出高质量回收骨料的可持续回收系统，研究了如何改善该研究的主要结果。用声发射方法建立了围绕聚集体的微裂纹。在高温历史下，将AE技术用于非常早的混凝土。阐明了微裂纹生成的机制，并详细研究了微裂纹的特性。（3）开发了使用AE分析外部约束混凝土的微裂纹的方法。约束标本的开裂强度远低于不受约束的标本的拉伸强度。通过AE分析研究了原因。

项目成果

Characterization of Microcracking in Very Early Age Concrete Cumulative AE hits Subjected to Elevated Temperature by AE

极早期混凝土中微裂纹的表征 AE 累积温度受到 AE 影响

• 发表时间: 2010
• 期刊: Proceedings of JCI Vol.32, No.1
• 作者: Ha Ngoc Son;Akira Hosoda;Takeshi Watanabe
• 通讯作者: Takeshi Watanabe

高炉スラグタスクフォース成果報告

高炉矿渣工作组结果报告

• 发表时间: 2010

高炉スラグコンクリートのひび割れ抵抗性

高炉矿渣混凝土的抗裂性能

• 发表时间: 2009

ひび割れ抑制対策と表層品質の向上

抑制裂纹、提高表面质量的措施

• 发表时间: 2010

Detection of Microcracking in Concrete Subjected to Elevated Temperature at Very Early Age by Acoustic Emission

• DOI: 10.3151/jact.8.201
• 发表时间: 2010-06
• 期刊: Journal of Advanced Concrete Technology
• 影响因子: 2
• 作者: Ha Ngoc Son;A. Hosoda