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Hybrid fiber cement-based composite material for 3D printing and preparation method thereof

A technology of hybrid fibers and composite materials, which is applied in the direction of additive processing to optimize the pore structure of the system, improve mechanical properties, and reduce early cracking and shrinkage.

Active Publication Date: 2019-02-26
SOUTHEAST UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no relevant research report on the preparation of 3D printing cement-based composite materials based on industrial by-products and solid waste, mixed with calcium carbonate whiskers and polyvinyl alcohol fibers at home and abroad.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A hybrid fiber cement-based composite material for 3D printing, which is prepared from raw materials with the following weight components: 4.11 parts of ordinary Portland cement, 0.17 parts of sulphoaluminate cement, 0.48 parts of silica fume, and 3.81 parts of sand and gravel 0.10 parts of calcium carbonate whiskers, 0.006 parts of polyvinyl alcohol fiber, 0.01 parts of rheological agent, 1.43 parts of water, and 0.035 parts of water reducing agent.

[0026] First add the ordinary Portland cement, sulphoaluminate cement, silica fume, sandstone, calcium carbonate whisker and rheological agent into the mixer, and stir the dry powder at a uniform speed of 140rpm for 2-3min until it is completely mixed, and then Slowly add the formulated amount of water and water reducer to the mixture, and stir at a constant speed of 140rpm for 4 minutes; then slowly add the formulated amount of polyvinyl alcohol fiber into the mixture, and stir at a constant speed of 420rpm for 60-90s, an...

Embodiment 2

[0029] A hybrid fiber cement-based composite material for 3D printing, which is prepared from the following raw materials by weight: 4.29 parts of ordinary portland cement, 0 parts of sulphoaluminate cement, 0.95 parts of silica fume, and 3.85 parts of sand and gravel 0.10 parts of calcium carbonate whiskers, 0.005 parts of polyvinyl alcohol fiber, 0.01 parts of rheological agent, 1.43 parts of water, and 0.035 parts of water reducing agent.

[0030] First add the ordinary Portland cement, sulphoaluminate cement, silica fume, sandstone, calcium carbonate whisker and rheological agent into the mixer, and stir the dry powder at a constant speed of 140rpm for 2-3min until it is completely mixed, and then Slowly add the formulated amount of water and water reducer to the mixture, and stir at a constant speed of 140rpm for 4 minutes; then slowly add the formulated amount of polyvinyl alcohol fibers into the mixture, and stir at a constant speed of 420rpm for 60-90s to prepare the T...

Embodiment 3

[0033] A hybrid fiber cement-based composite material for 3D printing, which is prepared from the following raw materials by weight: 4.76 parts of ordinary Portland cement, 0.21 parts of sulphoaluminate cement, 0.10 parts of silica fume, and 3.80 parts of sand and gravel 0.15 parts of calcium carbonate whiskers, 0.005 parts of polyvinyl alcohol fiber, 0.005 parts of rheological agent, 1.45 parts of water, and 0.032 parts of water reducing agent.

[0034]First add the ordinary Portland cement, sulphoaluminate cement, silica fume, sandstone, calcium carbonate whisker and rheological agent into the mixer, and stir the dry powder at a uniform speed of 140rpm for 2-3min until it is completely mixed, and then Slowly add the formulated amount of water and water reducer to the mixture, and stir at a constant speed of 140rpm for 4 minutes; then slowly add the formulated amount of polyvinyl alcohol fiber into the mixture, and stir at a constant speed of 420rpm for 60-90s, and the product...

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PUM

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Abstract

The invention discloses a hybrid fiber cement-based composite material for 3D printing and a preparation method thereof. The hybrid fiber cement-based composite material comprises, by weight, 3.81 to4.76 parts of ordinary Portland cement, 0 to 0.21 parts of sulphoaluminate cement, 0 to 0.95 parts of silica fume, 3.81-4.35 parts of sand stone, 0.10-0.20 part of calcium carbonate whiskers, 0.005-0.007 part of polyvinyl alcohol fiber, 0.005-0.02 part of a rheological agent, 1.30-1.45 parts of water and 0.032-0.042 part of a water reducing agent. The hybrid fiber cement-based composite material is green and environmentally friendly in building 3D printing construction, has good printability, can significantly improve the mechanical properties, and is beneficial to popularize the application of 3D printing technology in civil engineering.

Description

Technical field: [0001] The invention relates to a 3D-printable hybrid fiber cement-based composite material and a preparation method thereof, belonging to the technical field of civil engineering materials. Background technique: [0002] 3D printing technology is a new manufacturing technology that gradually emerged in the late 1980s. It is a rapid manufacturing process based on digital models and using computer automatic control technology to construct three-dimensional entities through layer-by-layer printing. It is also called additive manufacturing. manufacture. This is a rapid prototyping technology based on the principle of discrete accumulation. In recent years, 3D printing technology has been paid more and more attention by scholars from various countries. In recent years, 3D printing has been widely used in automobiles, aerospace, machinery industry, consumer electronics, biomedicine, jewelry design, artistic creation, construction industry, consumer goods, cloth...

Claims

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Application Information

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IPC IPC(8): C04B28/06B33Y70/00
CPCB33Y70/00C04B28/06C04B2111/00017C04B2201/50C04B7/02C04B18/146C04B14/06C04B14/383C04B16/0641C04B2103/302C04B24/383
Inventor 潘金龙朱彬荣张洋周震鑫鲁聪
Owner SOUTHEAST UNIV
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