INFLUENCE OF TITANIUM OXIDE AND MAGNESIUM OXIDE ON THE MINERAL COMPOSITION AND THE PROPERTIES OF CEMENT

TiO₂およびMgOがクリンカー鉱物組成およびセメントの物性に及ぼす影響

It is expected that minor elements from waste materials, which is used for raw materials of clinker, would cause some impacts on clinker mineral composition and quality of cement. In this study, the authors investigated the influence of titanium oxide (TiO₂) and magnesium oxide (MgO) on the clinker mineral composition and the quality of cement. The authors prepared fifteen kinds of clinkers in a laboratory, changing TiO₂ content and MgO content in clinker, respectively. As a result of XRD Rietveld analysis, the authors identified that TiO₂ decreased alite and ferrite, and increased belite and aluminate. On the other hand, MgO increased alite and ferrite, and decreased belite and aluminate. Namely, the impact of TiO₂ and MgO on clinker mineral composition was the exactly opposite tendency. It also became clear that the impact on clinker mineral composition by TiO₂ was offset by MgO. On the other hand, both TiO₂ and MgO lowered compressive strength of cement. It meant that the impact on cement quality by TiO₂ could not be offset by MgO. It was estimated that the reason of the strength decline by TiO₂ was the decrease of alite amount, and the reason of the strength decline by MgO was the decrease of the alite reactivity, by investigating the relation between alite amount determined Rietveld analysis and compressive strength.セメント製造では原燃料として廃棄物が使用されているが、廃棄物由来の少量成分がクリンカー中に持ち込まれると、クリンカーの鉱物組成やセメントの物性に影響を及ぼすことが予想される。本研究では、MgOとTiO₂の含有量の異なる原料を焼成して検討を行なった。その結果、TiO₂とMgOがクリンカーの鉱物組成に及ぼす影響は逆の傾向を示し、TiO₂が及ぼす影響はMgO含有により相殺されることがわかった。セメントの強度発現性に及ぼす影響はTiO₂およびMgO共に含有量増加に伴い、低下傾向を示した。その要因はTiO₂はエーライト量の減少によるもので、MgOはエーライトの反応性の低下によるものと推定された。

• Record URL:
  https://doi.org/10.14250/cement.66.211
• Record URL:
  https://www.jstage.jst.go.jp/article/cement/66/1/66_211/_pdf
• 
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=INFLUENCE+OF+TITANIUM+OXIDE+AND+MAGNESIUM+OXIDE+ON+THE+MINERAL+COMPOSITION+AND+THE+PROPERTIES+OF+CEMENT&author=T.+CHABAYASHI&author=A.+NAKAMURA&author=H.+KATO&author=K.+SADA&publication_year=2012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • CHABAYASHI, Takashi
  • NAKAMURA, Akinori
  • KATO, Hiroyoshi
  • SADA, Kaori
• Publication Date: 2012

Language

• English
• Japanese

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 211-216
• 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: Aluminates; Cement; Clinkers; Compressive strength; Magnesium compounds; Properties of materials; Titanium
• Subject Areas: Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01522849
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Apr 24 2014 11:44AM