A surface-modified carbon fiber-reinforced high-impedance and high-tensile-strength cement-based 3D printing substrate and its preparation method

Abstract

A surface modified carbon fiber reinforced high-resistance and high-tensile-strength cement-based 3D printing base material and a preparation method thereof belong to the technical field of building materials. The surface modified carbon fiber reinforced high-resistance and high-tensile-strength cement-based 3D printing base material is composed of, by weight part, 10-70 parts of surface modifiedcarbon fiber, 500-1500 parts of cement, 0-2000 parts of aggregate, 50-500 parts of mineral additives and 10-50 parts of chemical additives. The preparation method of the surface modified carbon fiberreinforced high-resistance and high-tensile-strength cement-based 3D printing base material specifically comprises the steps of preparation of nano-silica modifier; surface modification of carbon fiber, and preparation of the 3D printing base material. The surface modified carbon fiber reinforced high-resistance and high-tensile-strength cement-based 3D printing base material has the advantage that, through modification treatment of growing SiO2 on the surface of the carbon fiber, a layer of inactive but highly pozzolan-hydration active nano SiO2 can be formed on the surface of the carbon fiber and subjected to secondary hydration with a cement hydration product of Ca(OH)2 to produce calcium silicate hydrate C-S-H to improve interfacial weak areas, thereby further improving cooperativity and interfacial bonding strength between the carbon fiber and a cement base, giving full play to performance advantages of materials and achieving a tensile strength higher than 30 MPa.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a surface-modified carbon fiber-reinforced high-impedance and high-tensile-strength cement-based 3D printing substrate and a preparation method thereof. Background technique [0002] As an additive manufacturing technology, 3D printing has the advantages of saving materials, high efficiency and being suitable for complex personalized manufacturing. It has developed rapidly in various fields of the national economy and has received more and more attention and application. It has become a national strategic focus. One of the advanced technologies. In recent years, 3D printing technology has also received a lot of attention and development in the construction field. Compared with traditional buildings, 3D printing has the advantages of saving materials, low carbon, and environmental protection; and 3D printing construction technology does not require template...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low tensile strength, low impedance, and easy leakage of existing cement-based 3D printing substrates, and provide a surface-modified carbon fiber reinforced high-impedance, high-tensile-strength cement-based 3D printing substrate and its Preparation method, the 3D printing base material is a dry powder premix, which is printed after adding water and mixing well