The property of hardening and gaining strength through a reaction with water, as seen in cement, and then not losing strength even when placed in water. This is caused by anhydrous salt minerals changing into more stable hydrates with very little solubility in the presence of water. This is often seen in various calcium salt minerals. In contrast, the property of gypsum, in which the strength drops significantly in the presence of large amounts of water, is called air-hardening. → Related topic Pozzolana Source : Heibonsha Encyclopedia About MyPedia Information |
セメントにみられるような,水との反応により硬化して強度をもつようになり,その後水中に置いても強度が低下しない性質。無水塩鉱物が水の存在のもとに,より安定で溶解度のきわめて小さい水和物に変化することによる。各種カルシウム塩鉱物に多くみられる。これに対しセッコウのように大量の水の存在下では強度が著しく低下する性質を気硬性という。 →関連項目ポゾラン 出典 株式会社平凡社百科事典マイペディアについて 情報 |
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