INFLUENCE OF SPECIFIC SURFACE AREA AND CALCIUM SULFATE OF BLAST-FURNACE SLAG ON ADDITION EFFECT OF CALCIUM HYDROXIDE POWDER TO THE CEMENT CONTAINING BLAST FURNACE SLAG

高炉スラグ含有セメントへの水酸化カルシウム微粉末の添加効果に及ぼす高炉スラグの比表面積と石こうの影響

This paper describes the influence of the specific surface area of blast-furnace slag and the existence of calcium sulfate in blast-furnace slag on the effect of calcium hydroxide powder, which is considered to accelerate the reaction of blast-furnace slag in cement containing blast-furnace slag, for the purpose of improving a characteristic of cement containing blast-furnace slag, in order to use it effectively as general purpose cement. The physical properties of 4 types of blast-furnace slag cement, which was changed the specific surface area of blast-furnace slag and the existence of calcium sulfate in blast-furnace slag respectively, were assessed in the presence of calcium hydroxide powder. As a result, setting time of cement paste was accelerated by addition of calcium hydroxide powder regardless of the kinds of blast-furnace slag. Concerning compressive strength of mortar, in case of about 4,000cm²/g of slag’s specific surface area, strength was improved by addition of calcium hydroxide powder because of the acceleration of blast-furnace slag. Considering the result of the amount of calcium hydroxide measured by TG-DTA and the reaction ratio of blast-furnace slag by selective dissolution method, the existence of calcium sulfate in blast-furnace slag was guessed to improve the effect of calcium hydroxide powder in the early period of hydration.高炉スラグ含有セメントの性能改善を目的に、高炉スラグの比表面積および石こう含有の有無が、高炉スラグの反応刺激剤としての作用が考えられる水酸化カルシウム微粉末の添加効果に及ぼす影響について検討を行った。その結果、水酸化カルシウム微粉末の添加により、高炉スラグの種類に関わらず凝結は促進され、高炉スラグの比表面積が4,000cm²/g程度の場合に、高炉スラグの反応促進により強度が増進する傾向が確認された。また、高炉スラグに石こうを含有した場合、水酸化カルシウム微粉末による高炉スラグの反応が促進される時期が、石こうを含有しない場合より促進される傾向が確認された。

• Record URL:
  https://doi.org/10.14250/cement.68.233
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=INFLUENCE+OF+SPECIFIC+SURFACE+AREA+AND+CALCIUM+SULFATE+OF+BLAST-FURNACE+SLAG+ON+ADDITION+EFFECT+OF+CALCIUM+HYDROXIDE+POWDER+TO+THE+CEMENT+CONTAINING+BLAST+FURNACE+SLAG&author=H.+KOGA&author=T.+SHINMI&author=A.+NAKAMURA&author=H.+KATO&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • KOGA, Hiroaki
  • SHINMI, Tatsuo
  • NAKAMURA, Akinori
  • KATO, Hiroyoshi
• Publication Date: 2014

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 233-238
• Serial:
  • Cement Science and Concrete Technology
  • Volume: 68
  • 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: Calcium hydroxide; Calcium sulfates; Cement; Cement paste; Compressive strength; Mortar; Powders; Slag; Specific surface
• Subject Areas: Construction; Materials; Transportation (General); I32: Concrete; I50: Construction and Supervision of Construction;

Filing Info

• Accession Number: 01564556
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: May 26 2015 4:12PM