Multipurpose redaggregate for cement-based color facing mortar, and preparation method and usage of aggregate

The invention relates to multipurpose red aggregate for cement-based color facing mortar, and a preparation method and usage of the aggregate. According to the preparation method, color, gelling property and water absorbability of solid waste are sufficiently utilized, the solid waste is screened, crushed, grinded into powder and sieved by different levels and is then used as aggregate for producing the cement-based color facing mortar, thus red cement-based facing mortar is produced, and a way for fully recycling building solid waste at a high added value can be provided. Furthermore, the red aggregate can substitute for quartz sand, pigment and water retention components, so that the production cost of cement-based red inorganic facing mortar can be lowered, and the competitiveness of the cement-based red facing mortar in market can be improved.