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3D printing alkali-activated geopolymer composite material doped with hibiscus cannabinus bast fiber crop straw, and preparation method thereof

A bast fiber, 3D printing technology, applied in the field of 3D printing alkali-excited geopolymer composite materials and its preparation, can solve the problems of poor extrusion fluidity, low early strength, easy cracking, etc., and achieve excellent crack resistance, improved The effect of poor shape retention and environmental protection

Active Publication Date: 2021-07-13
SHANDONG AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the existing technical problems, the purpose of the present invention is to solve the problems of low early strength, poor shape retention, easy cracking, and poor extrusion fluidity of ordinary 3D printing building materials, overcome the deficiencies of the prior art, and provide a 3D printing The geopolymer composite environmental protection material with excellent performance, by optimizing the composition system, has a denser structure and higher strength, while effectively improving shape retention and crack resistance, and obtaining excellent printability and environmental benefits

Method used

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  • 3D printing alkali-activated geopolymer composite material doped with hibiscus cannabinus bast fiber crop straw, and preparation method thereof
  • 3D printing alkali-activated geopolymer composite material doped with hibiscus cannabinus bast fiber crop straw, and preparation method thereof
  • 3D printing alkali-activated geopolymer composite material doped with hibiscus cannabinus bast fiber crop straw, and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This example provides a 3D printing alkali-activated geopolymer composite material mixed with kenaf bast fiber crop straw. The raw materials are in parts by weight, 200 parts of slag, 10 parts of lignin, and 800 parts of fly ash. 15 parts of kenaf straw core (screening mesh number is 10-20 mesh), 2 parts of kenaf bast fiber (cutting length is 15 mm), 23 parts of NaOH, 177 parts of water glass, and 180 parts of water.

[0033] Preparation method: Mix and stir the proportioned amount of sodium hydroxide and water glass until completely dissolved to obtain the alkali activator and put it in cooling for later use; mix the proportioned amount of fly ash, slag, kenaf straw core, kenaf bast fiber and wood Mix the mixture evenly, inject alkali activator and water into it, stir at low speed for 1 minute, and then stir at high speed for 5 minutes to obtain a 3D printed alkali-activated geopolymer composite material mixed with kenaf bast fiber crop straw.

[0034] Finally, after t...

Embodiment 2

[0041] This example provides a 3D printing alkali-activated geopolymer composite material mixed with kenaf bast fiber crop straw. The raw materials are in parts by weight, 400 parts of slag, 10 parts of lignin, and 600 parts of fly ash. 30 parts of kenaf straw core (screening mesh number is 10-20 mesh), 10 parts of kenaf bast fiber (cutting length is 15 mm), 25 parts of NaOH, 200 parts of water glass, and 165 parts of water.

[0042] Preparation method: Mix and stir the proportioned amount of sodium hydroxide and water glass until completely dissolved to obtain the alkali activator and put it in cooling for later use; mix the proportioned amount of fly ash, slag, kenaf straw core, kenaf bast fiber and wood Mix the mixture evenly, inject alkali activator and water into it, stir at low speed for 1 minute, and then stir at high speed for 5 minutes to obtain a 3D printed alkali-activated geopolymer composite material mixed with kenaf bast fiber crop straw.

[0043] The performance...

Embodiment 3

[0046] This example provides a 3D printing alkali-activated geopolymer composite material mixed with kenaf bast fiber crop straw. The raw materials are in parts by weight, 300 parts of slag, 10 parts of lignin, and 700 parts of fly ash. 10 parts of kenaf straw core (screening mesh number is 10-20 mesh), 1 part of kenaf bast fiber (cutting length is 15 mm), 30 parts of NaOH, 170 parts of water glass, and 170 parts of water.

[0047] Preparation method: Mix and stir the proportioned amount of sodium hydroxide and water glass until completely dissolved to obtain the alkali activator and put it in cooling for later use; mix the proportioned amount of fly ash, slag, kenaf straw core, kenaf bast fiber and wood Mix the mixture evenly, inject alkali activator and water into it, stir at low speed for 1 minute, and then stir at high speed for 5 minutes to obtain a 3D printed alkali-activated geopolymer composite material mixed with kenaf bast fiber crop straw.

[0048] The performance t...

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Abstract

The invention relates to the field of 3D printing building materials, in particular to a 3D printing alkali-activated geopolymer composite material doped with hibiscus cannabinus bast fiber crop straw, and a preparation method thereof. The composite material comprises hibiscus cannabinus bast fiber crop straw, slag, fly ash, water glass, sodium hydroxide, lignin and water. The kenaf bast fiber, the kenaf straw core and the slag are doped into the alkali-activated fly ash-based geopolymer composite material for 3D printing, so that the stacking performance can be improved, the problems that a common 3D printing material is low in early strength, poor in shape retention, easy to crack, poor in extrusion fluidity and the like are solved, industrial and agricultural solid waste recycling is achieved, application in the intelligent construction field such as additive manufacturing is achieved, and good environmental benefits, economic benefits and social benefits are achieved.

Description

technical field [0001] The invention relates to the field of 3D printing building materials, in particular to a 3D printing alkali-activated geopolymer composite material mixed with kenaf bast fiber crop straw and a preparation method thereof. Background technique [0002] In the field of construction, 3D printing technology has the advantages of high efficiency, low cost, less pollution, and intelligence compared with traditional construction technology, especially in the intelligent construction of special-shaped buildings and component parts. Materials limit the application and development of 3D printing technology in the construction industry. For 3D printing building materials, low cost, environmental protection and waste, low carbon and printability are the key points for its future development. [0003] At present, cement-based materials and geopolymer materials are widely used in the field of architectural 3D printing materials. However, there is a problem of high ...

Claims

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Application Information

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IPC IPC(8): C04B28/00B33Y70/10C04B18/24C04B24/24C08H8/00C08H7/00C04B20/02C04B103/22C04B111/40C04B111/20
CPCC04B28/006B33Y70/10C04B18/248C04B24/24C08H8/00C04B2103/22C04B2111/00181C04B2111/40C04B2111/20C04B2201/50C04B18/141C04B18/08C04B12/04C04B22/062C04B20/02C04B20/026Y02W30/91Y02P40/10
Inventor 王少杰孔潇戴莉郭媛贾艳艳刘濠张泽焕修名竹
Owner SHANDONG AGRICULTURAL UNIVERSITY
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