APPLICATION OF NEW QUANTIFICATION METHOD OF HYDRATED MONOMER TO HYDRATION OF SILICATE MINERALS

• AWAMURA Tomotaka

  HOKKAIDO UNIVERSITY, Under Graduate School of Engineering

• KUROSAWA Kazuto

  HOKKAIDO UNIVERSITY, Graduate School of Engineering

• NAWA Toyoharu

  HOKKAIDO UNIVERSITY, Faculty of Engineering

• MINATO Daisuke

  CENTRAL RESEARCH INSTITUTE OF ELECTRIC POWER INDUSTRY

Bibliographic Information

Other Title

• HMの新しい定量方法を用いたC₃S、C₂Sの水和解析

Abstract

It is known from the data of the reaction of tricalcium silicate that it reacts with water in two steps；In the first step, it is dissolved by proton attacking from water and forms an intermediate phase which is converted in the second step into calcium silicate hydrate（C-S-H）as the final product. The intermediate phase has been detected by the difference in the data from ¹H-²⁹Si CP MAS-NMR and ²⁹Si MAS-NMR, but this method is complicated and expends a lot of time for measurement. This paper describes a new method for quantifying of hydrated monomer of silicate anion（HM）as intermediate phase, which can be quantified in a short time by the difference between the amount of dissolved silicate and the amount of silicate anion more than dimer. The amount of dissolved silicate is determined by X-Ray Diffraction / Rietveld analysis, while the amount of silicate anion more than dimer is determined by ²⁹Si MAS-NMR. Comparison of the amount of HM detected by ¹H-²⁹Si CP MAS-NMR and ²⁹Si MAS-NMR demonstrated that our method was suitable to quantify HM.<br/>Our method was applied for determining the quantity of HM during hydration process of tricalcium silicate, dicalcium silicate, and the mixture of tricalcium silicate and dicalcium silicate to make clear the mechanism on forming C-S-H. The results obtained in this study indicated that the contribution of HM to the formation of C-S-H was different depending on the kind of calcium silicate. Further, the comparison with the simple substances hydrating, it could be confirmed that the effect of HM on the formation C-S-H was complicated and different from that during hydration of the mixture of tricalcium silicate and dicalcium silicate.

Journal

• Cement Science and Concrete Technology

  Cement Science and Concrete Technology 66 (1), 47-54, 2012

  Japan Cement Association

Keywords

• Intermediate phase
• Hydrated monomer
• Tricalcium silicate
• Dicalcium silicate
• Hydration
• XRD
• NMR

Details

• CRID: 1390001204828489856
• NII Article ID: 130004574735
• DOI: 10.14250/cement.66.47
• ISSN: 21873313
• ISSN: 09163182
• Web Site: https://www.jstage.jst.go.jp/article/cement/66/1/66_47/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed