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High-toughness and high-cohesiveness C190-strength ultrahigh-strength fiber concrete and preparation method thereof

A fiber-reinforced concrete and high-adhesion technology, which is used in the field of building materials, is a ramie fiber mixed with basalt, and can solve the problems affecting the uniform dispersion of carbon nanotubes, less active groups, and low relative solubility, and achieves a reduction in the Cost, increase adhesion, and reduce CO2 emissions

Active Publication Date: 2021-06-25
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of carbon nanotubes is complete and smooth, with few defects and active groups, and the relative solubility in water and various solutions or composite materials is low. There is a large van der Waals force and surface free energy, and spontaneous agglomeration or entanglement is very easy to occur. , seriously affecting the uniform dispersion of carbon nanotubes in the polymer

Method used

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  • High-toughness and high-cohesiveness C190-strength ultrahigh-strength fiber concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 1) Add 17 parts by mass of water reducer and 30.5 parts by mass of hydroxyl-modified single-walled carbon nanotube dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 15 parts of shrinkage reducing agent and 2.5 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2, and 21 parts of carboxyl-modified polyvinyl alcohol polymers are prepared for later use, and the total water volume is 92 Wherein, carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 39%, water 60%, polyacrylate defoamer 1%;

[0101] 2) Divide 6.2 parts of ramie fiber, 958 parts of gravel, 715 parts of sand, 500 parts of cement, 67 parts of fly ash, 77 parts of straw ash, 68 parts of silica fume, 4.7 parts of nano silicon, and 11.2 parts of basalt fiber into three parts. Then spread a portion of ramie fiber and basal...

Embodiment 2

[0110] 1) Add 17.5 parts by mass of water reducer and 31 parts by mass of hydroxyl-modified single-walled carbon nanotube dispersion into two-thirds of the total water, which is recorded as mixed solution 1; Add 14.8 parts of shrinkage reducing agent and 2.8 parts of antifoaming agent into the water of one-third of the total water volume, and record it as mixed solution 2. After the preparation of 20.5 parts of carboxy-modified polyvinyl alcohol polymer is completed, the total water volume is 87 Parts; wherein, carboxy-modified polyvinyl alcohol polymer is prepared from raw materials in mass percentage: carboxy-modified polyvinyl alcohol 38.5%, water 60.5%, polyacrylate defoamer 1%;

[0111] 2) Divide 6.2 parts of ramie fiber, 958 parts of gravel, 727 parts of sand, 497 parts of cement, 68 parts of fly ash, 77 parts of straw ash, 70 parts of silica fume, 4.5 parts of nano silicon, and 11.1 parts of basalt fiber into Three parts, then spread a part of ramie fiber and basalt fib...

Embodiment 3

[0119] 1) Add 16.5 parts by mass of water reducer and 32 parts by mass of hydroxyl-modified single-walled carbon nanotube dispersion into two-thirds of the total water, and record it as mixed solution 1; Add 14.5 parts of shrinkage reducing agent and 2.9 parts of antifoaming agent into the water of one-third of the total water volume, and record it as mixed solution 2. After preparing 20 parts of carboxy-modified polyvinyl alcohol polymer, it is ready for use, and the total water volume is 92 Wherein, the carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 37%, water 62%, polyacrylate defoamer 1%;

[0120] 2) Divide 6.2 parts of ramie fiber, 958 parts of gravel, 723 parts of sand, 507 parts of cement, 70 parts of fly ash, 80 parts of straw ash, 65 parts of silica fume, 4.7 parts of nano silicon, and 11.2 parts of basalt fiber into Three parts, then spread a part of ramie fiber and basalt fib...

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Abstract

The invention discloses high-toughness and high-cohesiveness C190-strength ultrahigh-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, sand, gravel, fly ash, straw ash, silica fume, nano silicon, water, a water reducing agent, an exciting agent, a defoaming agent, a shrinkage reducing agent, ramie fibers, basalt fibers, hydroxyl modified single-walled carbon nanotube dispersion liquid and a carboxyl modified polyvinyl alcohol polymer according to the mixing ratio of (497-507): (715-730): 958: (65-70): (77-83): (65-70): (4.5-4.7): (87-92): (16.5-17.5): (14-14.5): (2.5-2.9): (14-15): (6-6.3): (11-11.3): (30-32): (20-21). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The concrete mechanics including the profile steel bonding performance and the durability are remarkably improved, and the cooperative work capacity of the concrete and the profile steel is enhanced.

Description

technical field [0001] The invention belongs to the field of building materials, and is a compound mixed with ramie fiber, basalt fiber, carboxyl-modified polyvinyl alcohol polymer, hydroxyl-modified single-wall carbon nanotube dispersion liquid, straw ash, fly ash, silica fume and nano-silicon Concrete with high toughness, high cohesiveness, high durability and high volume stability, specifically relates to a high-toughness and high cohesion C190 strength ultra-high-strength fiber concrete and a preparation method thereof. Background technique [0002] In structural design, considering the requirements of use function, component stiffness and convenient construction, it is usually necessary to use different grades of concrete for different stress situations to meet the required compressive, flexural and splitting tensile strength of the component when it is loaded. And to ensure the bond strength of concrete and steel working together. Concrete materials with different gra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/50C04B2201/52C04B14/02C04B14/06C04B14/026C04B14/4643C04B18/08C04B18/146C04B18/248C04B24/2623C04B24/2641C04B22/02C04B2103/302C04B2103/50C04B2103/0068C04B22/124C04B22/143C04B24/122Y02W30/91
Inventor 郑山锁阮升郑跃明铭董晋琦贺金川温桂峰刘晓航郑捷张艺欣王斌李磊董立国周炎
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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