High-toughness and high-cohesiveness C240 ultrahigh-strength hybrid fiber concrete and preparation method thereof

A technology with high cohesiveness and mixed fibers, which is applied in clay preparation devices, chemical instruments and methods, manufacturing tools, etc., can solve problems such as inability to achieve toughening effects, achieve low cost, good gradation, and reduce CO2 emissions Effect

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

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Problems solved by technology

At the same time, due to the presence of cracks of different sizes in conc

Method used

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  • High-toughness and high-cohesiveness C240 ultrahigh-strength hybrid fiber concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0103] 1) Add 19.5 parts by mass of water reducer and 42 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; 22.3 parts of carboxyl-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 72 parts; Among them, the nano-titanium / graphene oxide dispersion is composed of 1.2 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%;

[0104] 2) Mix 7.5 parts of ramie fiber, 850 parts of gravel, 760 parts of sand, 545 parts of cement, 70 parts of fly ash, 103 parts of straw ash, 120 parts of silica fume, 5.3 part...

Embodiment 2

[0113] 1) Add 20 parts by mass of water-reducing agent and 41 parts by mass of nano-titanium / graphene oxide dispersion into two-thirds of the total water, which is recorded as mixed solution 1; 14 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; 21.8 parts of carboxy-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 72 parts; Among them, the nano-titanium / graphene oxide dispersion is composed of 1.7 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 38.7%, water 60%, polyacrylate defoamer 1.3%;

[0114] 2) Mix 7.2 parts of ramie fiber, 850 parts of gravel, 755 parts of sand, 547 parts of cement, 68 parts of fly ash, 102 parts of straw ash, 125 parts of silica fume, 5.4 ...

Embodiment 3

[0122] 1) Add 20 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; 15 parts of shrinkage reducing agent and 2.9 parts of antifoaming agent are added to the water of one-third of the total water volume, which is recorded as mixed solution 2; 21.5 parts of carboxy-modified polyvinyl alcohol polymers are prepared for later use; the total water volume is 74 parts; Among them, the nano-titanium / graphene oxide dispersion is composed of 1.7 parts of graphene oxide powder and 0.4 parts of nano-TiO 2 Made; carboxy-modified polyvinyl alcohol polymer is prepared according to the mass percentage of raw materials: carboxy-modified polyvinyl alcohol 37%, water 62%, polyacrylate defoamer 1%;

[0123] 2) Mix 7.3 parts of ramie fiber, 855 parts of gravel, 760 parts of sand, 547 parts of cement, 73 parts of fly ash, 100 parts of straw ash, 130 parts of silica fume, 5.3 ...

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Abstract

The invention discloses high-toughness and high-cohesiveness C240 ultrahigh-strength hybrid fiber concrete and a preparation method thereof. The 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 (545-550): (750-760): (850-860): (68-73): (100-105): (120-130): (5.2-5.4): (72-76): (19-20): (16-17): (2.8-3.2): (14-15): (7.2-7.5): (13-13.3): (20-21): (21.5-23): (40-44). The preparation method comprises the steps of uniformly mixing the materials by a layered stirring method, discharging, forming and curing. The concrete mechanics including the bonding performance and the durability between the concrete and 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 C240 ​​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 ...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B24/12C04B22/14C04B22/12C04B22/06C04B18/24C04B18/14C04B18/10C04B18/08C04B14/46C04B14/38B28C5/40B28B1/093B28B1/087
CPCC04B28/04C04B18/248C04B14/383C04B14/4643C04B22/06C04B18/101C04B18/08C04B18/146C04B22/143C04B22/124C04B24/122B28C5/402B28B1/087B28B1/093C04B2201/50C04B14/06C04B14/02C04B2103/302C04B2103/50C04B14/04C04B24/2623Y02W30/91
Inventor 郑山锁阮升郑捷郑跃杨松姬金铭曹琛温桂峰王斌龙立李磊杨建军段培亮董立国
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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