| 摘要 |
PURPOSE:To provide an inexpensive cement excellent in early strength property and good in binding property of cement components to aggregate components. CONSTITUTION:The cement contains as main components a cement component containing a non-hydraulic calcium silicate: 12CaO.7Al2O3 and gypsum and an aggregate component containing at least one kind of calcium carbonate and iron oxide. The cement component is inexpensive, and its hydrate forms ettringite, high aluminous gel, etc., to exhibit an excellent early strength property. The ettringite is inferior in the binding property to usual quartz sand aggregates, but strongly bonds to calcium carbonate, or iron oxide. |
