論文

査読有り
2018年7月1日

Reduction of water content in calcium aluminate cement with/out phosphate modification for alternative cementation technique

Cement and Concrete Research
  • I. Garcia-Lodeiro
  • ,
  • K. Irisawa
  • ,
  • F. Jin
  • ,
  • Y. Meguro
  • ,
  • H. Kinoshita

109
開始ページ
243
終了ページ
253
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.cemconres.2018.04.019
出版者・発行元
Elsevier Ltd

Cementation of the secondary aqueous wastes from TEPCO Fukushima Daiichi Nuclear Power Plant is challenging due to the significant strontium content and radioactivity, leading to a potential risk of hydrogen gas generation via radiolysis of water content. The present study investigates the reduction of water content in calcium aluminate cement (CAC) with/out phosphate modification by a heat-treatment during the solidification. The reduction of water in the CAC was found restricted by the rapid formation of crystalline hydration phases, whereas the phosphate-modified system allowed the gradual reduction of water, achieving the reduction of 60% water content at 95 °C. Curing at 60–95 °C also eliminated the significant cracks found at 35 °C in the phosphate system. The possible difference in the amorphous products, NaCaPO4∙nH2O type at 35 °C and Ca(HPO4)∙xH2O type at 60–95 °C, may have contributed to the improvement in the microstructure together with the change in the pore size distribution.

リンク情報
DOI
https://doi.org/10.1016/j.cemconres.2018.04.019
ID情報
  • DOI : 10.1016/j.cemconres.2018.04.019
  • ISSN : 0008-8846
  • SCOPUS ID : 85046645016

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