High-toughness and high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and preparation method thereof

A technology with high cohesiveness and mixed fibers, which is applied in the direction of climate sustainability, sustainable waste treatment, solid waste management, etc. conjunctive effect

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

At the same time, due to the presence of cracks of different sizes in concrete, adding a single fiber often cannot achieve the best toughening effect

Method used

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  • High-toughness and high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] 1) Add 21 parts by mass of water-reducing agent and 43 parts by mass of nano-titanium / graphene oxide dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 14.5 parts of shrinkage reducing agent and 3.2 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2; 22.4 parts of carboxy-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 70 parts; Among them, the nano-titanium / graphene oxide dispersion is composed of 1.8 graphene oxide powder and 0.5 parts of nano-TiO 2 Made; carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 38.5%, water 60.4%, polyacrylate defoamer 1.1%;

[0104] 2) Mix 7.5 parts of ramie fiber, 830 parts of gravel, 765 parts of sand, 555 parts of cement, 65 parts of fly ash, 105 parts of straw ash, 130 parts of silica fume, 5.6 par...

Embodiment 2

[0113] 1) Add 20.5 parts by mass of water reducing agent and 44 parts by mass of nano-titanium / graphene oxide dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 14.7 parts of shrinkage reducing agent and 3.3 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2; 22.8 parts of carboxy-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 70 parts; Among them, the nano-titanium / graphene oxide dispersion consists of 1.3 parts of graphene oxide powder and 0.5 parts of nano-TiO 2 Made; carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 39%, water 60%, polyacrylate defoamer 1%;

[0114] 2) 8 parts of ramie fiber, 830 parts of gravel, 770 parts of sand, 550 parts of cement, 67 parts of fly ash, 105 parts of straw ash, 125 parts of silica fume, 5.5 parts o...

Embodiment 3

[0122] 1) Add 21 parts by mass of water-reducing agent and 46 parts by mass of nano-titanium / graphene oxide dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 15 parts of shrinkage reducing agent and 3 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2; 22 parts of carboxyl-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 73 parts; Among them, the nano-titanium / graphene oxide dispersion is composed of 1.8 parts of graphene oxide powder and 0.4 parts of nano-TiO 2 Made; carboxy-modified polyvinyl alcohol polymer is prepared from raw materials according to mass percentage: carboxy-modified polyvinyl alcohol 36.7%, water 62%, polyacrylate defoamer 1.3%;

[0123] 2) Mix 7.8 parts of ramie fiber, 835 parts of gravel, 770 parts of sand, 555 parts of cement, 70 parts of fly ash, 103 parts of straw ash, 135 parts of silica fume, 5.5 p...

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Abstract

The invention discloses high-toughness and high-cohesiveness C250 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The ultrahigh-strength hybrid 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, CaCO3 whiskers, a carboxyl modified polyvinyl alcohol polymer and nano titanium / graphene oxide dispersion liquid according to the mixing ratio of (550-560): (760-770): (830-840): (65-70): (103- 108): (125-135): (5.4-5.6): (70-75): (20-21): (16-17): (3-3.3): (14.5-15): (7.5-8): (13.3-13.6): (21-21.5): (22-23.5): (42-46). The materials are evenly mixed at intervals through a layered stirring method, and discharging, forming and curing are conducted. The mechanical property and durability of the concrete and the bonding property between the concrete and the profile steel are obviously improved.

Description

technical field [0001] The invention belongs to the field of building materials, and is a kind of ramie fiber, basalt fiber, CaCO 3 Whiskers, carboxyl-modified polyvinyl alcohol polymers, nano-titanium / graphene oxide dispersions, straw ash, fly ash, silica fume and nano-silicon have high toughness, high adhesion, high durability, and high volume The invention relates to stable concrete, in particular to a high-toughness and high-cohesion C250 ultra-high-strength hybrid 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 grades ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B40/00C04B20/02C04B24/12C04B24/26C04B24/32C04B14/46C04B14/38C04B18/24C04B18/10C04B22/14C04B22/12C04B14/30C04B14/02C04B111/20C04B111/22C04B111/27C04B111/34
CPCC04B28/04C04B20/023C04B40/0039C04B40/0046C04B40/0028C04B2201/50C04B2201/52C04B2111/22C04B2111/2015C04B2111/20C04B2111/343C04B2111/27C04B2111/29C04B14/06C04B14/14C04B18/08C04B18/101C04B18/146C04B14/066C04B2103/302C04B2103/50C04B2103/0068C04B18/248C04B14/4656C04B14/383C04B24/2623C04B24/2641C04B22/143C04B22/124C04B24/122C04B14/305C04B20/008C04B14/024C04B24/32Y02W30/91
Inventor 郑山锁董晋琦阮升刘晓航杨松郑淏温桂峰刘华龙立尚志刚郑捷张晓辉曹琛董立国
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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