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|Section2= |Section3= |Section4= |Section5= |Section6= |Section7= |Section8= }} Monocalcium aluminate (CaAl2O4) is one of the series of calcium aluminates.〔H F W Taylor, ''Cement Chemistry'', Academic Press, 1990, ISBN 0-12-683900-X, p 35〕 It does not occur in nature, but is important in the composition of calcium aluminate cements. ==Properties== Monocalcium aluminate is formed when the appropriate proportions of calcium carbonate and aluminium oxide are heated together until the mixture melts. It melts incongruently at 1390 °C. The crystal is monoclinic and pseudohexagonal, and has density 2945 kg.m−3. In calcium aluminate cements, it exists as a solid solution in which the amount of minor elements depends upon the bulk composition of the cement. A typical composition〔P. C. Hewlett (Ed)''Lea's Chemistry of Cement and Concrete: 4th Ed'', Arnold, 1998, ISBN 0-340-56589-6, p715〕 is Ca0.93Al1.94Fe0.11Si0.02O4. It reacts rapidly with water, forming the metastable hydrate CaO·Al2O3·10H2O, or a mixture of 2CaO·Al2O3·8H2O, 3CaO·Al2O3·6H2O and Al(OH)3 gel. These reactions form the first stage of strength development in calcium aluminate cements. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「monocalcium aluminate」の詳細全文を読む スポンサード リンク
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