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A platform for research: civil engineering, architecture and urbanism
METHOD OF PRODUCING MOLDED BODY OF TOBERMORITE-CONTAINING CALCIUM SILICATE, AND MOLDED BODY OF TOBERMORITE-CONTAINING CALCIUM SILICATE
To provide a method of producing a molded body of tobermorite-containing calcium silicate while decreasing the heating temperature and the pressurizing force, without decreasing a heating time during the hydrothermal synthesis or increasing a heating time during the hydrothermal synthesis.SOLUTION: In a method of producing a molded body of tobermorite-containing calcium silicate, comprising the steps of dehydrating aqueous slurry prepared by mixing water with a mixed raw material including a siliceous raw material, a calcareous raw material, gypsum, and an aluminum-containing compound reacting with the gypsum at a normal temperature to form ettringite, molding the same, and subjecting the obtained molded product to a heat treatment, the content ratio of an aluminum (Al) component relative to the total amount of the aluminum (Al) component and a silicon (Si) component in the aqueous slurry is higher than 15 mol% and 25 mol% or less and the content ratio of the aluminum (Al) component relative to a sulfur (S) component is from 0.40 to 1.05 in terms of mol ratio.SELECTED DRAWING: None
【課題】水熱合成時の加熱処理時間を低減したり、水熱合成時の加熱処理時間を増大させることなく加熱温度および加圧力を低減しつつトバモライト含有珪酸カルシウム成形体を製造する方法を提供する。【解決手段】珪酸質原料、石灰質原料、石膏および当該石膏と常温で反応してエトリンガイトを生成するアルミニウム含有化合物を含む混合原料を水に混合した水性スラリーを脱水成形し、得られた成形物を加熱処理するトバモライト含有珪酸カルシウム成形体の製造方法であって、前記水性スラリー中のアルミニウム（Ａｌ）成分と珪素（Ｓｉ）成分との合計量に対するアルミニウム（Ａｌ）成分の含有割合が１５モル％を超え２５モル％以下であり、前記水性スラリー中の硫黄（Ｓ）成分に対するアルミニウム（Ａｌ）成分の含有比が、モル比で、０．４０～１．０５であることを特徴とするトバモライト含有珪酸カルシウム成形体の製造方法である。【選択図】なし
METHOD OF PRODUCING MOLDED BODY OF TOBERMORITE-CONTAINING CALCIUM SILICATE, AND MOLDED BODY OF TOBERMORITE-CONTAINING CALCIUM SILICATE
To provide a method of producing a molded body of tobermorite-containing calcium silicate while decreasing the heating temperature and the pressurizing force, without decreasing a heating time during the hydrothermal synthesis or increasing a heating time during the hydrothermal synthesis.SOLUTION: In a method of producing a molded body of tobermorite-containing calcium silicate, comprising the steps of dehydrating aqueous slurry prepared by mixing water with a mixed raw material including a siliceous raw material, a calcareous raw material, gypsum, and an aluminum-containing compound reacting with the gypsum at a normal temperature to form ettringite, molding the same, and subjecting the obtained molded product to a heat treatment, the content ratio of an aluminum (Al) component relative to the total amount of the aluminum (Al) component and a silicon (Si) component in the aqueous slurry is higher than 15 mol% and 25 mol% or less and the content ratio of the aluminum (Al) component relative to a sulfur (S) component is from 0.40 to 1.05 in terms of mol ratio.SELECTED DRAWING: None
【課題】水熱合成時の加熱処理時間を低減したり、水熱合成時の加熱処理時間を増大させることなく加熱温度および加圧力を低減しつつトバモライト含有珪酸カルシウム成形体を製造する方法を提供する。【解決手段】珪酸質原料、石灰質原料、石膏および当該石膏と常温で反応してエトリンガイトを生成するアルミニウム含有化合物を含む混合原料を水に混合した水性スラリーを脱水成形し、得られた成形物を加熱処理するトバモライト含有珪酸カルシウム成形体の製造方法であって、前記水性スラリー中のアルミニウム（Ａｌ）成分と珪素（Ｓｉ）成分との合計量に対するアルミニウム（Ａｌ）成分の含有割合が１５モル％を超え２５モル％以下であり、前記水性スラリー中の硫黄（Ｓ）成分に対するアルミニウム（Ａｌ）成分の含有比が、モル比で、０．４０～１．０５であることを特徴とするトバモライト含有珪酸カルシウム成形体の製造方法である。【選択図】なし
METHOD OF PRODUCING MOLDED BODY OF TOBERMORITE-CONTAINING CALCIUM SILICATE, AND MOLDED BODY OF TOBERMORITE-CONTAINING CALCIUM SILICATE
トバモライト含有珪酸カルシウム成形体の製造方法およびトバモライト含有珪酸カルシウム成形体
OIKAWA JUN (author) / KOBAYASHI YUKI (author) / TANI YUYA (author) / TAKAMA KENGO (author)
2024-10-25
Patent
Electronic Resource
Japanese
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Calcium silicate structure and carbonation shrinkage of a tobermorite-based material
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Calcium silicate structure and carbonation shrinkage of a tobermorite-based material
| British Library Online Contents | 2004