PERFORMANCE IMPROVEMENT OF COPPER SLAG CONCRETE BY USE OF FLY ASH

銅スラグを用いたコンクリートのフライアッシュ利用による性能向上に関する研究

Copper slag has not been generally used for concrete, as it increases bleeding, adversely affecting the strength and durability of hardened concrete. In this study, the use of fly ash for copper slag concrete was attempted from the standpoint of suppressing bleeding and effectively utilizing resources. The effects of copper slag and fly ash used in combination on the properties of concrete while fresh and after hardening were thus investigated. As a result, it was found that the use of copper slag increases large pores and the air-entraining and water-reducing admixture demand, but the use of fly ash in combination is effective in reducing the amount of bleeding water, improving the compressive strength development, and reducing the length change ratio. It was also found that selection of a rock type with a high fines content and the use of a thickener contribute to greater strength gains.銅スラグをコンクリートへ利用した場合、ブリーディングが増大し、硬化コンクリートの強度・耐久性への影響が大きいため一般的な利用に至っていない。本研究では、ブリーディングの抑制および資源の有効利用の観点からフライアッシュの利用を試み、銅スラグとフライアッシュを併用したコンクリートのフレッシュおよび硬化特性に及ぼす影響について検討した。その結果、銅スラグ利用は、AE減水剤添加量や大きな細孔を増加させるが、フライアッシュの併用で、ブリーディングの減少、圧縮強度発現の向上、長さ変化率の減少等の効果が得られ、また、微粒分の多い岩種の利用や増粘剤使用は、強度発現の増加に寄与することなどが明らかになった。

• Record URL:
  • https://doi.org/10.14250/cement.66.629
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=PERFORMANCE+IMPROVEMENT+OF+COPPER+SLAG+CONCRETE+BY+USE+OF+FLY+ASH&author=M.+ISHII&author=K.+DEGUCHI&author=K.+SAKAI&author=S.+ABE&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • ISHII, Mitsuhiro
  • DEGUCHI, Kota
  • SAKAI, Koji
  • ABE, Shinji
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 629-636
• Serial:
  • Cement Science and Concrete Technology
  • Volume: 66
  • Issue Number: 1
  • Publisher: Japan Cement Association
  • ISSN: 0916-3182
  • EISSN: 2187-3313
  • Serial URL: https://www.jstage.jst.go.jp/browse/cement/-char/en
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Admixtures; Air entrainment; Bleeding; Carbonation; Compressive strength; Concrete; Copper; Fly ash; Pore size distribution; Slag
• Subject Areas: Construction; Highways; Materials; I32: Concrete; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 01522986
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Apr 24 2014 11:45AM