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High-toughness high-cohesiveness C160-strength 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 field that can solve the problems of less active groups, low relative solubility, and influence on the uniform dispersion of carbon nanotubes, so as to increase cohesion and reduce cost , to achieve the effect of reuse

Pending Publication Date: 2021-07-30
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 high-cohesiveness C160-strength ultrahigh-strength fiber concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0100] 1) Add 16 parts by mass of water reducer and 29 parts by mass of hydroxyl-modified single-walled carbon nanotube dispersion to two-thirds of the total water, and record it as mixed solution 1; Add 13 parts of shrinkage reducing agent and 2.5 parts of antifoaming agent to one-third of the total water volume, and record it as mixed solution 2. After preparing 18 parts of carboxy-modified polyvinyl alcohol polymer, it is ready for use, and the total water volume is 100 Wherein, the carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 38.8%, water 60.2%, polyacrylate defoamer 1%;

[0101] 2) Divide 5.8 parts of ramie fiber, 980 parts of gravel, 720 parts of sand, 470 parts of cement, 77 parts of fly ash, 72 parts of straw ash, 55 parts of silica fume, 4.1 parts of nano silicon, and 10.3 parts of basalt fiber into Three parts, then spread a part of ramie fiber and basalt fiber evenly in the...

Embodiment 2

[0110] 1) Add 15 parts by mass of water reducer and 29 parts by mass of hydroxyl-modified single-walled carbon nanotube dispersion to two-thirds of the total water, and record it as mixed solution 1; 13 parts of shrinkage reducing agent and 2.3 parts of antifoaming agent are added to one-third of the total water, which is recorded as mixed solution 2, and 19 parts of carboxyl-modified polyvinyl alcohol polymers are prepared for later use, with a total water volume of 105 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%;

[0111] 2) Divide 5.7 parts of ramie fiber, 980 parts of gravel, 710 parts of sand, 475 parts of cement, 77 parts of fly ash, 70 parts of straw ash, 50 parts of silica fume, 4.4 parts of nano silicon, and 10.3 parts of basalt fiber into Three parts, then spread a part of ramie fiber and basalt fiber evenly in the disc mixe...

Embodiment 3

[0119] 1) Add 14 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, and record it as mixed solution 1; Add 12.5 parts of shrinkage reducing agent and 2.6 parts of defoamer to one-third of the total water volume, and record it as mixed solution 2. After preparing 17 parts of carboxy-modified polyvinyl alcohol polymers, the total water volume is 105 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 5.6 parts of ramie fiber, 980 parts of gravel, 715 parts of sand, 480 parts of cement, 80 parts of fly ash, 72 parts of straw ash, 45 parts of silica fume, 4.4 parts of nano silicon, and 10.3 parts of basalt fiber into Three parts, then spread a part of ramie fiber and basalt fiber evenly in the disc mixer, and then place a part ...

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Abstract

The invention discloses high-toughness and high-cohesiveness C160-strength ultrahigh-strength fiber concrete and a preparation method thereof. The concrete is prepared from cement, sand, broken stone, coal ash, straw ash, silica fume, nano silicon, water, exciting agent, defoaming agent, shrinkage reducing agent, ramie fiber, basalt fiber, hydroxyl modified single-walled carbon nanotube dispersion liquid and carboxyl modified polyvinyl alcohol polymer according to the mixing ratios of (470-480):(710-720):980:(75-80):(70-75): (45-55):(4-4.4):(100-105):(14-16):(13-13.5):(2.3-2.6):(12-13):(5.6-5.8):(10.2-10.4):(27-31):(17-19). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanic performance of the concrete, including the structural steel bonding performance and the durability, is remarkably improved, and the cooperative work capacity of the concrete and structural 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 The invention relates to concrete with high toughness, high cohesiveness, high durability and high volume stability, in particular to an ultra-high-strength fiber concrete with high toughness and high cohesiveness C160 strength 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 ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B40/00C04B20/02C04B24/12C04B24/26C04B24/32C04B18/10C04B14/02C04B22/14C04B22/12C04B18/24C04B111/20C04B111/22C04B111/27C04B111/34
CPCC04B28/04C04B20/023C04B40/0039C04B40/0046C04B40/0028C04B2201/50C04B2201/52C04B2111/22C04B2111/2015C04B2111/20C04B2111/343C04B2111/27C04B2111/29C04B14/068C04B14/06C04B14/14C04B18/08C04B18/101C04B18/146C04B14/066C04B20/008C04B2103/302C04B2103/50C04B2103/0068C04B22/143C04B22/124C04B24/122C04B18/248C04B14/4656C04B24/2623C04B24/2641C04B14/026C04B24/32Y02W30/91
Inventor 郑捷郑山锁阮升温桂峰董立国王斌尚志刚姬金铭周炎张艺欣李磊杨路荣先亮董晋琦
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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