Hardened gypsum body, and preparation method therefor and use thereof

Abstract

The present disclosure relates to the technical field of gypsum and provides a hardened gypsum body, and a preparation method therefor and use thereof. The method comprises mixing powdered gypsum, a retarder and water, grinding, and immediately molding to obtain the hardened gypsum body, wherein the total time of the mixing and the grinding is 2-5 min, and the water addition amount during the mixing is 8-30% of the powdered gypsum total mass. The hardened gypsum body prepared by the method has obviously improved mechanical properties and low porosity, and can be used for preparing a mother rock of a lightweight aggregate, a mechanically compression-molded component, a mechanically compression-molded module or a recycled broken stone aggregate. The method greatly expands the application range of the hardened gypsum body, particularly improves the application performance of building gypsum, and is very suitable for preparing high-strength and high-quality phosphogypsum building material products.

Dependencies are inferred from the claim text.