Surface modified carbon fiber reinforced high-resistance and high-tensile-strength cement-based 3D (three-dimensional) printing base material and preparation method thereof

A high tensile strength, surface modification technology, applied in the field of building materials, can solve the problems of low impedance, easy leakage, low tensile strength, etc., to achieve high impedance, improve the interface bond strength, maintain the effect of impedance

Active Publication Date: 2018-09-14
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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specific Embodiment approach 1

[0017] Specific embodiment 1: This embodiment describes a surface-modified carbon fiber-reinforced high-impedance and high-tensile-strength cement-based 3D printing substrate. The cement-based 3D printing substrate includes surface-modified carbon fiber 10 in parts by mass. ~70 parts, 500~1500 parts of cement, 0~2000 parts of fine aggregate (can be 0, that is, no fine aggregate), 50~500 parts of mineral admixture and 10~50 parts of chemical admixture.

specific Embodiment approach 2

[0018] Embodiment 2: A surface-modified carbon fiber reinforced high-impedance and high-tensile-strength cement-based 3D printing substrate described in Embodiment 1, the cement is Portland cement or ordinary Portland cement, and the The chemical admixtures used are (1) accelerators and water reducers; (2) accelerators, water reducers and super early strength agents; or (3) accelerators, water reducers, super early strength agents and primers Aerosol mixture. Portland cement is mostly used for quality inspection and calibration, and ordinary Portland cement is mostly used in actual projects. The mixed material content of the former is less than 5%, and the mixed material content of the latter is between 5 and 20%. The mixed material refers to the artificial or natural mineral material added together with clinker and gypsum to improve cement performance, adjust cement grade and increase cement output when grinding cement. Specifically, it can be granulated blast furnace slag, ...

specific Embodiment approach 3

[0019] Embodiment 3: A surface-modified carbon fiber-reinforced high-impedance and high-tensile-strength cement-based 3D printing substrate described in Embodiment 1, the mineral admixture is silica fume, fly ash, granulated blast furnace One or several types of slag.

[0020] Embodiment 4: A surface-modified carbon fiber-reinforced high-impedance and high-tensile-strength cement-based 3D printing substrate described in Embodiment 1, the surface-modified carbon fiber uses ordinary carbon fiber as the fiber matrix, and a layer grows on the surface Nano silica with thickness <1000nm, capable of reacting with Portland cement or ordinary Portland cement. The carbon fibers used as the fiber matrix are carbon fibers of various lengths.

[0021] Embodiment 5: The surface-modified carbon fiber-reinforced high-impedance and high-tensile-strength cement-based 3D printing substrate described in Embodiment 1, the fine aggregate is a fine aggregate with a particle size ≤ 5000 μm and a rea...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B20/10B33Y70/00B33Y10/00
CPCB33Y10/00B33Y70/00C04B20/1066C04B28/04C04B2111/00181C04B14/386C04B18/146C04B18/08C04B18/142C04B20/0076C04B2103/302C04B2103/12C04B2103/304C04B2103/0068
Inventor 肖会刚刘敏
Owner HARBIN INST OF TECH
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