IMPROVEMENT MECHANISM OF RECYCLED CONCRETE USING C-S-H TYPE ACCELERATOR AND MODIFYING RECYCLED AGGREGATE BY CARBONATION TECHNOLOGY

Akari Shibuya, Nobuhiro Matsuda, Takeshi Iyoda

研究成果: Conference contribution

抄録

In Japan, there is concern that concrete blocks due to demolition will increase with the renewal of concrete structures. Although it has been used for roadbed materials as recycling, in recent years, aggregates are removed from the concrete mass by crushing and grinding and used again as concrete aggregates. In concrete using recycled aggregates, it is necessary to take account of insufficient strength, drying shrinkage, freeze-thaw resistance. In previous study, the quality of recycled aggregates was improved by adsorbing carbon dioxide to recycled aggregates, and recycled concrete used the modified aggregates has been confirmed to increase strength and reduce drying shrinkage. In this study, we focused on the aggregate interface of concrete such as the interfacial transition zone for the purpose of clearing the quality improvement method of recycled concrete. We attempted to modify the aggregate interface using a C-S-H hardening accelerator using two recycled aggregates of different quality and concrete using ordinary aggregates. We will also compare which is more effective, concrete that tried to modify the aggregate interface and recycled concrete that uses carbonated modified recycled aggregate. We try include strength test, drying shrinkage test, and freeze-thaw test. We clarify the matters concerned about recycled concrete.

本文言語English
ホスト出版物のタイトルfib International Conference on Concrete Sustainability 2021
編集者Katerina Sojkova, Petr Hajek, Ctislav Fiala
出版社Czech Technical University in Prague
ページ533-538
ページ数6
ISBN(電子版)9788001069646
DOI
出版ステータスPublished - 2022 3月 3
イベントfib International Conference on Concrete Sustainability 2021, ICCS 2021 - Prague, Czech Republic
継続期間: 2021 9月 82021 9月 10

出版物シリーズ

名前Acta Polytechnica CTU Proceedings
33
ISSN(電子版)2336-5382

Conference

Conferencefib International Conference on Concrete Sustainability 2021, ICCS 2021
国/地域Czech Republic
CityPrague
Period21/9/821/9/10

ASJC Scopus subject areas

  • 工学一般
  • 物理学および天文学一般
  • 応用数学

フィンガープリント

「IMPROVEMENT MECHANISM OF RECYCLED CONCRETE USING C-S-H TYPE ACCELERATOR AND MODIFYING RECYCLED AGGREGATE BY CARBONATION TECHNOLOGY」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

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