3D printing suitable solid waste-based cementitious material and preparation method thereof

Abstract

The present invention discloses a 3D printing suitable solid waste-based cementitious material and a preparation method thereof, belonging to the technical field of building materials. The 3D printing suitable solid waste-based cementitious material comprises the following components in parts by weight: 80-120 parts of a solid waste cementitious component, 60-100 parts of an aggregate, 0.1-0.5 parts of a viscosity modifier, 0.05-0.3 parts of a setting time regulator, 0.3-1.2 parts of a water reducer, and 25-40 parts of water; the solid waste cementitious component comprises the following ingredients in weight percentage: 40-60% of ground granulated blast furnace slag powder, 20-35% of fly ash, 5-15% of steel slag powder, 3-10% of silica fume, and 5-12% of a solid alkali activator. This material exhibits excellent printability (including extrudability, buildability and open time), high early and late strength, low shrinkage, and enables high-value, large-scale utilization of multiple solid wastes.