Characterization of Fly Ash dominating ASR suppressing Effects by using SEM-EDS and EBSD

DOI 4 Citations 9 References
  • Takahashi Haruka
    太平洋セメント（株）中央研究所 セメント・コンクリート研究部
  • Yamada Kazuo
    （株）太平洋コンサルタント 東京営業所 営業推進部

Bibliographic Information

Other Title
  • ASR抑制効果を支配するフライアッシュキャラクターのSEM-EDS/EBSDによる解析
  • Characterization of fly ash dominating ASR suppressing effects by using SEM-EDS and EBSD (in Japanese)

Description

Feature analysis of fly ash (FA) was carried out for five different FA (equivalent to JIS Class II) having varied levels of alkali-silica reaction (ASR) suppression effect. The purpose of this study was to identify the chemical and physical characteristics relating ASR suppressing effects. The equipment used was a scanning electron microscope (SEM) combined with, backscattered electron (BSE) detector, energy dispersive X-ray spectrometer (EDS) and electron backscattered diffraction (EBSD). Authors classified FA particles into six phases quantitatively by feature analysis and gave particle size distribution and specific surface area of each phase. The classified particles as mullite dispersed in Si-rich glass matrix showed a strong negative correlation with 14-day expansion of mortar bar evaluated by ASTM C 1260. Judging from the results obtained in this study, specific surface area of Si-rich glass accompanying mullite crystals is revealed to be the key for the ASR suppressing effect of FA.

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Details 詳細情報について

  • CRID
    1390282679382417536
  • NII Article ID
    130002151712
  • DOI
    10.3151/crt.23.1
  • ISSN
    21862745
    13404733
  • Text Lang
    ja
  • Data Source
    • JaLC
    • Crossref
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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