CHRORIDE ION DIFFUSIVITY IN HARDENDED CEMETITIOUS MATERIALS USING VARIOUS SILICA FUME

各種シリカフュームを用いたセメント系硬化体の塩分浸透抵抗性

The purpose of this study is to clarify the reason of the decrease of the chloride ion effective diffusion coefficient of the concrete using both of blast furnace slag and silica fume, and the effect of the qualities of the silica fume on the chloride ion effective diffusion coefficient. Chloride ion effective diffusion coefficient and oxygen diffusion coefficient of mortar specimens using various silica fume were measured. The porosity, the amount of C-S-H and the C/S ratio of C-S-H were also measured. From the experimental results, the reason of the decrease of diffusion coefficients of the specimen due to silica fume can be explained by the decrease of the C/S ratio of C-S-H. The effect of silica fume on diffusion coefficients can be estimated the ability to decrease the C/S ratio of C-S-H.本研究は、高炉スラグ微粉末とシリカフュームを併用した場合の塩分浸透抵抗性の向上メカニズムの解明とシリカフュームの品質がコンクリートの塩分浸透抵抗性に及ぼす影響を明らかにすることを目的として、JIS A 6207の規格を満足しない7種類のシリカフュームを用いて検討を行った。その結果、セメント─高炉スラグ微粉末─シリカフュームの3成分系結合材において塩化物イオン実効拡散係数が顕著に低下するのは、C-S-HのC/S比の低下による空隙構造の複雑化によって説明できること、また、シリカフュームの拡散係数低減効果はC/Sを低下する能力によって評価できることを明らかにした。

• Record URL:
  https://doi.org/10.14250/cement.68.352
• Summary URL:
  http://scholar.google.com/scholar_lookup?title=CHRORIDE+ION+DIFFUSIVITY+IN+HARDENDED+CEMETITIOUS+MATERIALS+USING+VARIOUS+SILICA+FUME&author=T.+SAEKI&author=K.+MASHIMA&author=M.+KIKUCHI&author=T.+SAITO&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • SAEKI, Tatsuhiko
  • MASHIMA, Kohei
  • KIKUCHI, Michio
  • SAITO, Tsuyoshi
• Publication Date: 2014

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 352-359
• 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 silicate; Cement; Chlorides; Diffusivity; Ions; Porosity; Silica fume
• Uncontrolled Terms: C-S-H; Calcium silicate hydrate; Oxygen diffusion coefficient
• Subject Areas: Highways; Materials; I30: Materials;

Filing Info

• Accession Number: 01563118
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: May 18 2015 11:00AM