Microbial mineralized fiber micro reinforcement concrete material facing 3D printing and preparation method thereof

A technology of micro-reinforced concrete and 3D printing, applied in the direction of additive processing, etc., can solve the problem of limited lifting range, achieve the effect of improving performance, improving strength and ductility, and improving strength

Inactive Publication Date: 2019-04-16
HENAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fiber microreinforcements and geopolymers help to improve the tensile, durability, and early strength properties of cement-based materials, but their improvement in the most critical strength is limited

Method used

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  • Microbial mineralized fiber micro reinforcement concrete material facing 3D printing and preparation method thereof
  • Microbial mineralized fiber micro reinforcement concrete material facing 3D printing and preparation method thereof
  • Microbial mineralized fiber micro reinforcement concrete material facing 3D printing and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A 3D printing-oriented microbial mineralized fiber micro-reinforced concrete material (see figure 1), which is mainly composed of the following raw materials in parts by weight: 100 parts of Portland cement, 30 parts of fly ash, 150 parts of quartz sand with a particle size of 0.15 mm to 4.75 mm, 2 parts of polypropylene fiber with a length of 9 mm, early strength 2.5 parts of sodium sulfate, 4.0 parts of sodium aluminate quick-setting agent, 30 parts of water, 30 parts of microbial bacteria liquid. The microbial bacterial liquid is composed of bacillus pasteurian liquid and nutrient solution containing urea and calcium chloride, wherein the concentration of bacillus pasteurian bacterial liquid is OD600 value of 1.2, urea 60 g / L, calcium chloride 111 g / L.

[0033] The preparation method of the above-mentioned microbial mineralized fiber micro-reinforced concrete material oriented to 3D printing is specifically: put Portland cement, fly ash, sand, microbial bacterial li...

Embodiment 2

[0035] A microbial mineralized fiber micro-reinforced concrete material for 3D printing, which is mainly composed of the following raw materials in parts by weight: 100 parts of Portland cement, 20 parts of fly ash, and 100 parts of river sand with a particle size of 0.15 mm to 4.75 mm 1 part of carbon fiber with a length of 12 mm, 4 parts of early strength agent sodium sulfate, 5.0 parts of quick-setting agent sodium aluminate aluminate, 20 parts of water, and 40 parts of microbial bacterial liquid. The microbial bacterial liquid is composed of bacillus pasteurian bacterial liquid and nutrient solution containing urea and calcium chloride, wherein the concentration of bacillus pasteurian bacterial liquid is OD600 value of 0.8, urea 45g / L, calcium chloride 130 g / L.

[0036] Refer to Example 1 for the preparation method of the above 3D printing-oriented microbial mineralized fiber micro-reinforced concrete material.

Embodiment 3

[0038] A 3D printing-oriented microbial mineralized fiber micro-reinforced concrete material, which is mainly composed of the following raw materials in parts by weight: 100 parts of Portland cement, 40 parts of fly ash, 250 parts of quartz sand with a particle size of 0.15 mm to 4.75 mm 4 parts of glass fiber with a length of 6 mm, 1.5 parts of early strength agent sodium sulfate, 3.0 parts of quick-setting agent sodium aluminate aluminate, 40 parts of water, and 20 parts of microbial bacterial liquid. Described microbial bacterial liquid is made up of bacillus pasteurian bacterial liquid, and the nutrient solution containing urea and calcium chloride, wherein, the concentration of bacillus pasteurian bacterial liquid is that OD600 value is at 1.0, urea 75g / L, calcium chloride 90g / L.

[0039] Refer to Example 1 for the preparation method of the above 3D printing-oriented microbial mineralized fiber micro-reinforced concrete material.

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Abstract

The invention relates to a microbial mineralized fiber micro reinforcement concrete material facing 3D printing. The material is prepared from, by weight, 100 parts of Portland cement, 20-40 parts offly ash, 100-300 parts of sand, 1-5 parts of fiber, 1.5-4 parts of an early strength agent, 3.0-5.0 parts of an accelerator, 20-40 parts of water and 20-40 parts of microbial bacteria solution, wherein the microbial bacteria solution is composed of a bacillus pasteurii bacteria solution and a nutrient solution containing urea and calcium chloride. Accordingly, on the basis of traditional cement-based concrete, fiber micro reinforcement is additionally arranged, the material tensile strength and ductility are improved, fly ash geopolymer is additionally arranged, the early strength and fast hardening property of the material are improved, the bacillus pasteurii and the nutrient solution containing urea and calcium chloride are additionally arranged, the intensity of final state of the wholematerial is improved, and the concrete material has the advantages of being high in tensile and compression strength, durable, strength in early and the like.

Description

technical field [0001] The invention belongs to the technical field of construction engineering, and specifically relates to a 3D printing-oriented microbial mineralized fiber micro-reinforced concrete material and a preparation method thereof, and its specific application is to provide high-performance concrete raw materials for 3D printing buildings. Background technique [0002] At present, 3D printing has been widely used in aerospace, biomedical, mechanical molds and other fields, but it is still in its infancy in the field of construction, and the proportion of engineering applications is very small. The most critical reason is that the existing 3D printing concrete materials are difficult to meet Requirements for mechanical properties such as strength and ductility of large structures. [0003] Traditional cement-based concrete materials are typical brittle materials with low tensile strength and ductility, and it is difficult to meet the requirements of 3D printed bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04B33Y70/00
CPCB33Y70/00C04B28/04C04B2111/00181C04B2201/50C04B18/08C04B14/06C04B16/0633C04B22/08C04B22/147C04B2103/0001C04B14/386C04B14/42
Inventor 杜文风张皓张帆王龙轩贺鹏斐赵艳男
Owner HENAN UNIVERSITY
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