Hydraulic phosphogypsum (pg)-based cementitious material, and preparation method and use thereof

Abstract

The present disclosure provides a hydraulic phosphogypsum (PG)-based cementitious material, and a preparation method and use thereof, belonging to the technical field of cementitious materials. The present disclosure provides a hydraulic PG-based cementitious material, including the following raw materials: modified PG particles and an auxiliary active powder, where the modified PG particles have a dosage of 50 wt % to 95 wt %; the modified PG particles are obtained by conducting modification on original PG particles through a calcareous material, and the calcareous material has a mass 3% to 5% of that of the original PG particles; and the original PG particles have typical dimensions of: a length of 50 μm to 200 μm and an aspect ratio of 1.5 to 5; and at least 80% of materials in the auxiliary active powder have a particle size of less than or equal to 60 μm. In the present disclosure, the hydraulic PG-based cementitious material adopts a particle accumulation method of gap grading. The modified PG particles have a dosage up to 95 wt %, and can form a hydraulic structure after hydration. Therefore, the cementitious material can be applied in various occasions.

Dependencies are inferred from the claim text.