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High-toughness and high-cohesiveness C200 ultrahigh-strength fiber concrete and preparation method thereof

A technology of fiber concrete and high cohesion, which is applied in the field of building materials. It is a kind of mixed ramie fiber and basalt field. It can solve the problems of less active groups, low relative solubility, and influence on the uniform dispersion of carbon nanotubes. Adhesiveness, cost reduction, and the effect of reuse

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 C200 ultrahigh-strength fiber concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 1) Add 17.2 parts by mass of water reducer and 31.5 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 15 parts of shrinkage reducing agent and 2.5 parts of defoamer to one-third of the total water volume, and record it as mixed solution 2. After preparing 21.5 parts of carboxy-modified polyvinyl alcohol polymers, the total water volume is 90 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 6.3 parts of ramie fiber, 945 parts of gravel, 720 parts of sand, 510 parts of cement, 64 parts of fly ash, 80 parts of straw ash, 74 parts of silica fume, 4.8 parts of nano silicon, and 11.4 parts of basalt fiber into three parts. Then spread a portion of ramie fiber and basalt fiber evenly in the pan mixer, and then place a po...

Embodiment 2

[0110] 1) Add 16.8 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 14.5 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 85 Wherein, the carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 38.5%, water 60%, polyacrylate defoamer 1.5%;

[0111] 2) Divide 6.2 parts of ramie fiber, 945 parts of gravel, 720 parts of sand, 507 parts of cement, 60 parts of fly ash, 90 parts of straw ash, 70 parts of silica fume, 4.6 parts of nano silicon, and 11.3 parts of basalt fiber into Three parts, then spread a part of ramie fiber and bas...

Embodiment 3

[0119] 1) Add 17.3 parts by mass of water reducer and 31 parts by mass of hydroxyl-modified single-walled carbon nanotube dispersion to two-thirds of the total water, which is recorded as mixed solution 1; Add 14.8 parts of shrinkage reducing agent and 2.7 parts of antifoaming agent into the water of one-third of the total water volume, and record it as mixed solution 2. After preparing 21.5 parts of carboxy-modified polyvinyl alcohol polymers, the total water volume is 87 Parts; Wherein, carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 37.6%, water 61%, polyacrylate defoamer 1.4%;

[0120] 2) Divide 6.3 parts of ramie fiber, 945 parts of gravel, 720 parts of sand, 510 parts of cement, 60 parts of fly ash, 90 parts of straw ash, 74 parts of silica fume, 4.7 parts of nano silicon, and 11.4 parts of basalt fiber into Three parts, then spread a part of ramie fiber and basalt fiber evenly in ...

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Abstract

The invention discloses high-toughness and high-cohesiveness C200 ultrahigh-strength fiber concrete and a preparation method thereof. The ultrahigh-strength fiber 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 (507-518): (720-730): 945: (60-68): (80-90): (70-78): (4.6-4.8): (85-90): (16.8-18): (14.5-15): (2.5-2.9): (14.5-15): (6.2-6.4): (11.3-11.5): (31-32): (20.5-21.5). The materials are uniformly mixed at intervals through a layered stirring method, and preparation and maintenance are performed. The mechanical property, the bonding property with the profile steel, the cooperative working capacity and the durability of the concrete are all remarkably improved.

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 C200 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): C04B28/04C04B40/00C04B24/12C04B24/26C04B24/32C04B20/02C04B22/14C04B22/12C04B14/02C04B18/10C04B18/24C04B111/20C04B111/22C04B111/27C04B111/34
CPCC04B28/04C04B40/0039C04B40/0046C04B20/023C04B40/0028C04B2201/50C04B2201/52C04B2111/22C04B2111/2015C04B2111/20C04B2111/343C04B2111/27C04B2111/29C04B14/06C04B14/068C04B14/14C04B18/08C04B18/101C04B18/146C04B14/066C04B20/008C04B2103/302C04B2103/50C04B2103/0068C04B18/248C04B14/4656C04B24/2623C04B24/2641C04B22/143C04B22/124C04B24/122C04B14/026C04B24/32Y02W30/91
Inventor 郑山锁明铭阮升姬金铭龙立周炎刘晓航郑捷郑淏李磊段培亮张晓宇郑跃董立国
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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