ケイ酸カルシウム水和物の耐酸性に及ぼす原料のCaO/SiO_2モル比および加熱処理温度の影響 Effect of CaO/SiO_2 Mole Ratio of Batch Mixture and Temperature of Thermal Treatment on Acid Resistance of Calcium Silicate Hydrate

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著者

    • 恒松 修二 TSUNEMATSU Syuji
    • 産業技術総合研究所サステナブルマテリアル研究部門 Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST)
    • 井上 耕三 INOUE Kozo
    • 産業技術総合研究所サステナブルマテリアル研究部門 Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST)
    • 恒松 絹江 TSUNEMATSU Kinue
    • 産業技術総合研究所サステナブルマテリアル研究部門 Materials Research Institute for Sustainable Development, National Institute of Advanced Industrial Science and Technology (AIST)

抄録

Calcium silicate hydrates were synthesized using batch mixtures with Ca/Si molar ratio of 0.4-1.0 under hydrothermal conditions at 180-190°C. Acid resistance was evaluated by measuring the dissolved amounts of the heat-treated products at 800-1100°C when treated with hydrochloric acid solution of pH 2. Xonotlite was formed from the batch mixture with a Ca/Si molar ratio of 1.0, it transform to β-wollastonite by heat treatment, and it was found that the formed β-wollastonite easily dissolved in hydrochloric acid solution of pH 2.<BR>1.1 nm tobermorite was formed from the batch mixture with Ca/Si molar ratio of 0.4 and 0.6, and it transformed to β-wollastonite at temperature above 1000°C, and heat-treated products hardly dissolved in hydrochloric acid solution of pH 2. β-wollastonite was formed from 1.1 nm tobermorite by heat treatment as a phase transition product with excess silica content. It was suggested that the excess silica content was deposited on the surface of β-wollastonite and it improved the acid resistance of heat-treated product.

収録刊行物

  • Journal of the Society of Inorganic Materials, Japan : セッコウ・石灰・セメント・地球環境の科学  

    Journal of the Society of Inorganic Materials, Japan : セッコウ・石灰・セメント・地球環境の科学 14(328), 152-158, 2007-05-01 

    The Society of Inorganic Materials, Japan

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各種コード

  • NII論文ID(NAID)
    10018419915
  • NII書誌ID(NCID)
    AA11416367
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13453769
  • NDL 記事登録ID
    8813562
  • NDL 雑誌分類
    ZP9(科学技術--化学・化学工業--無機化学・無機化学工業--セラミックス・窯業)
  • NDL 請求記号
    Z17-B79
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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