The invention relates to the technical field of building materials and in particular to 3D printing alkali-fast
cement concrete which is made of ore
slag and steel
slag as raw materials. The concreteis made of the following raw materials:
solid granules, an alkali excitant, a
retarder and water, wherein the
mass of the alkali excitant accounts for 4-10% of the
mass of the
solid granules; the
retarder accounts for 0.5-3.5% of the
mass of the
solid granules; the water accounts for 10-45% of the mass of the solid granules. Ore
slag powder and steel slag
powder are adopted as main raw materials,an alkali excitation technique is implemented, the preparation method is simple and easy to operate, high-temperature calcining is avoided, the
energy consumption is reduced, a great amount of lands occupied by
industrial waste slag
discharge such as steel slag are saved, and the lands are protected and saved. Dependence to natural resources is reduced, the energy is saved, CO2 emission is reduced, environment
pollution is alleviated, and in addition, due to a 3D printing technique, the construction and maintenance time can be shortened, the time for
casting and demolding a concrete structureis shortened, the construction efficiency is improved, and materials are saved, and the like.