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Sprayed high-ductility concrete and preparation method thereof

A technology of high ductility concrete and mixture, applied in the field of concrete spraying, can solve the problems of difficult pouring or pressing, and achieve the effects of increasing cohesion, reducing rebound rate and good fiber dispersion.

Inactive Publication Date: 2021-03-16
南京高延科技新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, there are still many difficulties in the application of high ductility concrete in the process of strengthening existing structures, such as areas that are not easy to pour or touch

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Cement, fly ash, quartz medium sand, quartz fine sand, water reducer, defoamer, stable plasticizer, renestable latex powder, speed coagulant and polyvinyl alcohol fiber and water weight ratio: 0.380: 0.400 .. 0.00017: 0.00041: 0.00017: 0.015: 0.030: 0.017: 0.2789.

[0027] Cement, fly ash, quartz medium sand, quartz fine sand, water reducer, can be dispersible latex powder, stabilizer, defoamer, and then added to the mixer, at 50 to 70 r / min stirring speed The time for mixing stirring is 2 min.

[0028] After the water was added, stirring was continued at 50 to 70 r / min, and stirring was stirred for 3 to 5 min. Finally, polyvinyl alcohol fibers were added, and the mixture was stirred at the same stirring rate of 3 to 5 min. The mixture obtained by stirring the mixture was applied to the injector, and the mixture was blended with a wet injection machine to the nozzle, and after adding a jellystant on the nozzle, it was injected to the structural surface at a higher speed...

Embodiment 2

[0030] Cement, fly ash, quartz medium sand, quartz fine sand, water reducer, defoamer, stable plasticizer, renewable latex powder, speed coagulant and polyvinyl alcohol fibers and water weight ratio: 0.488: 0.412 .. 0.030: 0.017: 0.030: 0.017: 0.2789.

[0031] Cement, fly ash, quartz medium sand, quartz fine sand, water reducer, can be dispersible latex powder, stabilizer, defoamer, and then added to the mixer, at 50 to 70 r / min stirring speed The time for mixing stirring is 2 min.

[0032] After the water was added, stirring was continued at 50 to 70 r / min, and stirring was stirred for 3 to 5 min. Finally, polyvinyl alcohol fibers were added, and the mixture was stirred at the same stirring rate of 3 to 5 min. The mixture obtained by stirring the mixture was applied to the injector, and the mixture was blended with a wet injection machine to the nozzle, and after adding a jellystant on the nozzle, it was injected to the structural surface at a higher speed, and the spray thic...

Embodiment 3

[0034] Cement, fly ash, quartz medium sand, quartz fine sand, water reducer, defoamer, stable plasticizer, renestable latex powder, speed coagulant, polyvinyl alcohol fiber and water weight ratio: 0.500: 0.38 : 0.25: 0.26: 0.25: 0.00017: 0.00041: 0.00017: 0.015: 0.030: 0.020: 0.28.

[0035] Cement, fly ash, quartz medium sand, quartz fine sand, water reducer, can be dispersible latex powder, stabilizer, defoamer, and then added to the mixer, at 50 to 70 r / min stirring speed The time for mixing stirring is 2 min.

[0036] After the water was added, stirring was continued at 50 to 70 r / min, and stirring was stirred for 3 to 5 min. Finally, polyvinyl alcohol fibers were added, and the mixture was stirred at the same stirring rate of 3 to 5 min. The mixture obtained by stirring the mixture was applied to the injector, and the mixture was blended with a wet injection machine to the nozzle, and after adding a jellystant on the nozzle, it was injected to the structural surface at a h...

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Abstract

The invention discloses sprayed high-ductility concrete and a preparation method thereof. The sprayed high-ductility concrete is characterized by being prepared from, by mass, 1 part of cementing material, 0.3-0.4 part of quartz sand, 0.01-0.02 part of synthetic fiber, 0.0001-0.0002 part of water reducing agent, 0.001-0.02 part of redispersible latex powder, 0.03-0.05 part of accelerator, 0.0001-0.0002 part of plastic stabilizer, 0.0004-0.0005 part of defoaming agent and 0.2-0.3 part of water. The sprayed high-ductility concrete has the beneficial effects that the sprayed high-ductility concrete effectively solves the problem that the high-ductility concrete is difficult to carry out spraying construction, and meanwhile, overcomes the defect that common sprayed concrete is difficult to play a role in reinforcing the structure; and the sprayed high-ductility concrete disclosed by the invention has good fiber dispersity, and the problem of material blockage in the spraying construction process is reduced. According to the sprayed high-ductility concrete, the redispersible latex powder is adopted, the cohesive force among particles is increased, and the rebound rate of the sprayed high-ductility concrete is effectively reduced.

Description

Technical field [0001] The present invention relates to the field of concrete jets of building materials, and more particularly to injection of high-precision concrete and preparation methods thereof. Background technique [0002] High-profile fiber concrete as a microscopic mechanical and fracture mechanics, with cement mortar as matrix, with fiber to reinforcement material, by optimizing design in stretching and shear load, high strength, high degree, high-energy consumption capability The new fiber reinforced composite material has multi-cracks and strain hardening characteristics under stretching and shear load. Therefore, high-profile concrete is widely used in many fields such as existing structural reinforcement, improve structural shock resistance. [0003] However, there is still a lot of difficulties in both the existing structural reinforcement applications, such as areas where it is not easy to pour or more. At the same time, in the repair project, it is required to r...

Claims

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Application Information

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IPC IPC(8): C04B28/04
CPCC04B28/04C04B2111/00155
Inventor 陈贝妮卜新星傅发兵吕磊
Owner 南京高延科技新材料有限公司
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