Cement-based composite material used for 3D printing technology as well as preparation method and application thereof

Abstract

The invention provides a cement-based composite material used for a 3D printing technology as well as a preparation method and application thereof. The cement-based composite material is prepared from the following raw materials based on the total weight of the composite material: 33%-40% of cement, 0%-8% of inorganic powder, 32%-38% of tailing machine-made sand, 2.5%-3% of a high-molecular polymer, 0.1%-0.5% of a water reducing agent and 16.7%-20% of mixing water; a composite thickening time control agent, a thixotropic agent, a volume stabilizer and the like are added into a mixture to prepare an inorganic composite material; and then the inorganic composite material can be directly pumped into a 3D printer for building to be applied to construction. The cement-based composite material is an inorganic material and the materials are easily available; a lot of industrial waste materials can be used; therefore, the cement-based composite material is low in cost, energy-saving and environment-friendly; the condensation time can be flexibly controlled, and the material has super early strength, good caking property and strong stability; the requirements of 3D printing construction continuity of the building and the building strength are met so that the house building has good global stability and use safety; and the application and popularization of 3D printing technology can be greatly promoted.

Description

technical field [0001] The invention relates to the technical field of 3D printing materials, in particular to a cement-based composite material used in 3D printing technology and its preparation method and application. Background technique [0002] 3D printing (3D printing) is a kind of rapid prototyping technology. Based on digital model files, it uses powdered metal or plastic and other bondable materials to construct objects by layer-by-layer printing, and finally turns the blueprint on the computer into into a real thing. There are applications in jewelry, footwear, industrial design, architectural engineering and construction, automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and others. 3D printing architecture is a building constructed by 3D printing technology, consisting of a giant three-dimensional extrusion machine, using gear transmission on the extrusion head of the system to create th...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a cement-based composite material for 3D printing technology and its preparation method and application, to solve the problem that most of the materials used in 3D printing technology in the prior art are organic materials, which are printed in a molten state at high temperature , Chemical reactions such as oxidation and decomposition are prone to occur, and unpleasant toxic gases are released during the preparation and construction process, which is harmful to the environment and the human body; it also solves the problems of high printing conditions, high cost, poor mechanical properties, and the use of organic materials to form organic materials. The poor livability of the buildings limits the application of 3D printing technology to a certain extent; it also solves the technical problems that the existing ordinary cement-based materials have a long setting time and are generally fluid, have no thixotropic properties, and are not suitable for 3D printing processes.