Micro-expansive cement prepared from fluidized bed combustion ash, and preparation method of cement

The invention provides a micro-expansive cement prepared from fluidized bed combustion ash, and a preparation method of the cement. The micro-expansive cement comprises, by weight, 20-30% of fluidized bed combustion ash, 20-28% of clinker, 17-40% of slag, 20-25% of fly ash and a grinding aid, and the addition amount of the grinding aid is less than or equal to 0.5% of the total mass of the materials. The micro-expansive cement with stable performance is prepared by adjusting the matching proportion of the fluidized bed combustion ash, the clinker, the slag and the fly ash, and has the characteristics of high strength and small dry shrinkage coefficient. The preparation method of the micro-expansive cement effectively consumes the sulfur-fixing ash residues, is economical and energy-saving, not only improves the comprehensive utilization of the solid wastes, but also relieves the pressure of the environment, and accords with the green and environment-friendly concept. 本发明提供了一种利用固硫灰渣制备的微膨胀水泥及该水泥的制备方法，该微膨胀水泥包括按重