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Ultra-high tenacity multi-walled carbon nanotube-polyvinyl alcohol fiber modified geopolymer and preparation method thereof

A multi-wall carbon nanotube and polyvinyl alcohol fiber technology is applied in the field of ultra-high toughness multi-wall carbon nanotube-polyvinyl alcohol fiber modified geopolymer and its preparation, which can solve the problems of low toughness and low tensile strength, etc. problem, to achieve the effect of fast setting time, simple preparation method and environmental protection

Active Publication Date: 2022-03-04
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is a green and environmentally friendly cementitious material with low production cost. It has excellent properties such as high temperature resistance, acid and alkali resistance, and solidification of heavy metals, but it also has disadvantages such as low toughness and low tensile strength.

Method used

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  • Ultra-high tenacity multi-walled carbon nanotube-polyvinyl alcohol fiber modified geopolymer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] In the present embodiment, 28 parts of fly ash, 8 parts of slag, 2 parts of metakaolin, 2 parts of silica fume, and 37 parts of quartz sand are poured into the mixer, stirred at a slow speed for 100 seconds to obtain a mixture, and then 0.03 1 part of dispersant, 0.04 part of defoamer and 7 parts of water are placed in 15 parts of complex base excitation solution, stirred for 180s, and then placed under 300W power for 0.5 hours to obtain a uniform mixed solution, and then this uniform mixed solution is added Stir in the above mixture for 150 seconds, then add modified multi-walled carbon nanotube-polyvinyl alcohol fibers, stir slowly for 60s, stir quickly for 90s, then pour, vibrate, and maintain for 28 days under standard curing conditions to obtain The super high tenacity multi-walled carbon nanotube-polyvinyl alcohol fiber modified geopolymer.

Embodiment 2

[0030] In the present embodiment, 27 parts of fly ash, 9 parts of slag, 3 parts of metakaolin, 1 part of silica fume, and 38 parts of quartz sand are poured into the mixer, stirred at a slow speed for 100 seconds to obtain a mixture, and then 0.03 1 part of dispersant, 0.04 part of defoamer and 7 parts of water are placed in 15 parts of complex base excitation solution, stirred for 210s, then placed under 400W power for 0.6 hours to obtain a uniform mixed solution, and then this uniform mixed solution is added Stir in the above mixture for 165 seconds, then add the modified multi-walled carbon nanotube-polyvinyl alcohol fiber, stir slowly for 75s, stir quickly for 105s, then pour, vibrate, and maintain for 28 days under standard curing conditions to obtain The super high tenacity multi-walled carbon nanotube-polyvinyl alcohol fiber modified geopolymer.

Embodiment 3

[0032] In the present embodiment, 25 parts of fly ash, 9 parts of slag, 3 parts of metakaolin, 3 parts of silica fume and 37 parts of quartz sand are poured into the mixer, stirred at a slow speed for 100 seconds to obtain the mixture, and then 0.04 1 part of dispersant, 0.02 part of antifoaming agent and 7 parts of water are placed in 15 parts of complex base excitation solution, stirred for 240s, then placed under 500W power for 0.5-0.7 hours to obtain a uniform mixed solution, and then the uniform mixed solution Add the solution to the above mixture and stir for 180 seconds, then add the modified multi-walled carbon nanotube-polyvinyl alcohol fiber, stir slowly for 90s, stir quickly for 90-120s, then pour, vibrate, and maintain under standard curing conditions The superhigh toughness multi-walled carbon nanotube-polyvinyl alcohol fiber modified geopolymer was obtained in 28 days.

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Abstract

The invention discloses a geopolymer modified with ultra-high toughness multi-walled carbon nanotube-polyvinyl alcohol fiber and a preparation method thereof. The material uses the geopolymer as a base material and is composed of composite fibers. The geopolymer of the invention has the characteristics of fast coagulation speed, high toughness, fast coagulation speed, good fluidity, etc. In addition, the geopolymer also has high construction performance and durability. The ultra-high toughness multi-walled carbon nanotube-polyvinyl alcohol fiber modified geopolymer of the present invention can be widely used in the reinforcement of structures such as beams and columns, and has high application and promotion value.

Description

technical field [0001] The invention relates to the technical field of geopolymer-based materials, in particular to a superhigh toughness multi-walled carbon nanotube-polyvinyl alcohol fiber modified geopolymer and a preparation method thereof. Background technique [0002] Ultra-high toughness cementitious composite (ECC) is a material reinforced by short fibers and has significant strain hardening characteristics after hardening. Under tensile load, its ultimate tensile strain can reach 3%. Because ECC does not use coarse aggregate, a large amount of cement is required, which not only increases the cost, but also wastes a lot of energy and produces CO 2 It also poses great challenges to the ecological environment. However, geopolymer is an amorphous three-dimensional network structure composed of silicon-oxygen tetrahedrons and aluminum-oxygen tetrahedrons, which is generated by using fly ash, slag and other industrial wastes under alkali excitation conditions. It is a g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B14/02C04B16/06C04B18/08C04B18/14
CPCC04B28/006C04B18/08C04B18/141C04B14/026C04B16/0641C04B14/106C04B18/146C04B14/06C04B12/04C04B2103/408C04B2103/50Y02W30/91Y02P40/10
Inventor 李杉李发平卢亦焱杨哲铭闫东明蔡新华
Owner WUHAN UNIV
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