EFFECT OF ADDITION OF FLY ASH, LIMESTONE POWDER AND GYPSUM AND TEMPERATURE ON THE SULFATE RESISTANCE OF MORTAR

フライアッシュ、石灰石微粉末、石こう及び浸漬温度が硫酸塩劣化に及ぼす影響

The mechanisms of sodium sulfate attack to mortar are different from that of magnesium sulfate attack. The effects of the addition of fly ash, the limestone powder, and gypsum on sulfate resistance were studied. Soaking temperature was changed from 20℃ to 60℃. The resistance in the sulfate solution is evaluated by the small sized test method using mortar pieces of 8mm cubic Evaluation test method. In sodium sulfate solution, the addition of fly ash and gypsum improved the sulfate resistance. The destruction to the particles did not occur at high temperatures. In case of magnesium sulfate solution, the addition of gypsum and fly ash, high temperature became less effective than the case of sodium sulfate solution.硫酸ナトリウム及び硫酸マグネシウムでは、硫酸塩劣化のメカニズムが異なる。硫酸塩劣化の抑制効果があるといわれている石灰石微粉末、フライアッシュ及び石こうを混和し、浸漬温度を20℃のほかに、40℃、60℃に変更し、8mm角のモルタル小片を用いた試験方法により、モルタルの硫酸塩劣化での変状に及ぼす影響について検討を行った。硫酸ナトリウム溶液浸漬では、フライアッシュ及び石こうの混和が硫酸塩抵抗性を向上させた。主としてエトリンガイトの生成による劣化のため、高温浸漬では劣化が抑制された。硫酸マグネシウム溶液浸漬においては、硫酸ナトリウム浸漬に比べて効果は小さくなるが、フライアッシュ及び石こうの混和、高温浸漬による硫酸塩抵抗性の向上が認められた。

• Record URL:
  • https://doi.org/10.14250/cement.68.389
• Summary URL:
  • http://scholar.google.com/scholar_lookup?title=EFFECT+OF+ADDITION+OF+FLY+ASH%2c+LIMESTONE+POWDER+AND+GYPSUM+AND+TEMPERATURE+ON+THE+SULFATE+RESISTANCE+OF+MORTAR&author=I.+HATAKEYAMA&author=S.+HANEHARA&author=T.+OYAMADA&author=D.+NAKAMURA&publication_year=2014
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09163182
• Authors:
  • HATAKEYAMA, Ito
  • HANEHARA, Shunsuke
  • OYAMADA, Tetsuya
  • NAKAMURA, Daiki
• Publication Date: 2014

Language

• English
• Japanese

Media Info

• Media Type: Web
• Features: References;
• Pagination: pp 389-395
• 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: Fly ash; Gypsum; Limestone dust; Mortar; Sodium sulfate; Sulfate resisting cement; Temperature
• Uncontrolled Terms: Magnesium sulfate
• Subject Areas: Highways; Materials; Pavements; I30: Materials;

Filing Info

• Accession Number: 01562564
• Record Type: Publication
• Source Agency: Japan Science and Technology Agency (JST)
• Files: TRIS, JSTAGE
• Created Date: Apr 30 2015 9:24AM