Cement-based elastic grouting material suitable for repairing concrete cracks in deep water and preparation method thereof

A grouting material and elastic technology, which is used in the field of repairing concrete cracks in hydraulic engineering to achieve the effects of low body shrinkage, high impact toughness and strong corrosion resistance.

Active Publication Date: 2019-02-05
NANJING HYDRAULIC RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Ordinary cement-based grouting mater...

Method used

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  • Cement-based elastic grouting material suitable for repairing concrete cracks in deep water and preparation method thereof
  • Cement-based elastic grouting material suitable for repairing concrete cracks in deep water and preparation method thereof
  • Cement-based elastic grouting material suitable for repairing concrete cracks in deep water and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] According to weight percentage, prepare the following materials: cement 21.5%, slag powder 19.4%, silicon powder 4.3%, gypsum powder 6.5%, rubber powder 10.8%, naphthalene sulfonate water reducer 1.3%, water-based acrylate emulsion 15.5%, Water-based epoxy curing agent 3.0%, polyester fiber 0.4%, water 17.3%.

[0060] The preparation method of above-mentioned deep water elastic grouting material, comprises the steps:

[0061] In the first step, the cement, slag powder, silicon powder, gypsum powder, rubber powder, and polyester fiber are weighed and stirred evenly, as the mixture A; in the second step, the water-based curing agent is added to water and diluted in equal proportions (this step The weight of the water used is not included in the above proportion weight), then add it to the water-based acrylate emulsion and stir evenly, as the mixture B; in the third step, add the mixture B to the mixture A, then add water and stir evenly to obtain the cement-based Elastic...

Embodiment 2

[0064] According to weight percentage, prepare the following materials: cement 20.7%, slag powder 18.7%, silicon powder 4.1%, gypsum powder 6.2%, rubber powder 10.4%, naphthalenesulfonate water reducer 1.2%, water-based acrylate emulsion 14.9%, Water-based epoxy curing agent 4.6%, polyester fiber 0.4%, water 18.8%.

[0065] The preparation method of above-mentioned deep water elastic grouting material, comprises the steps:

[0066] In the first step, the cement, slag powder, silicon powder, gypsum powder, rubber powder, and polyester fiber are weighed and stirred evenly, as the mixture A; in the second step, the water-based curing agent is added to water and diluted in equal proportions (this step The weight of the water used is not included in the above proportion weight), then add it to the water-based acrylate emulsion and stir evenly, as the mixture B; in the third step, add the mixture B to the mixture A, then add water and stir evenly to obtain the cement-based Elastic ...

Embodiment 3

[0069] According to weight percentage, prepare the following materials: cement 22.0%, slag powder 19.8%, silicon powder 4.4%, gypsum powder 6.6%, rubber powder 11.0%, naphthalenesulfonate water reducer 1.3%, water-based acrylate emulsion 21.1%, Water-based epoxy curing agent 2.2%, polyester fiber 0.4%, water 11.2%.

[0070] The preparation method of above-mentioned deep water elastic grouting material, comprises the steps:

[0071] In the first step, the cement, slag powder, silicon powder, gypsum powder, rubber powder, and polyester fiber are weighed and stirred evenly, as the mixture A; in the second step, the water-based curing agent is added to water and diluted in equal proportions (this step The weight of the water used is not included in the above proportion weight), then add it to the water-based acrylate emulsion and stir evenly, as the mixture B; in the third step, add the mixture B to the mixture A, then add water and stir evenly to obtain the cement-based Elastic ...

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Abstract

The invention relates to an engineering material and particularly relates to a grouting material for repairing concrete cracks in deep water. Cement, slag powder and rubber powder are taken as base materials, silica powder, gypsum powder, polyester fiber, a water reducing agent, water-based latex and a water-based curing agent are added according to a certain ratio, water is added, then the components are blended to form a groutable underwater non-dispersible plastomer, the plastomer is solidified to form an elastic solid capable of being bonded firmly to the interface of a concrete crack, andthe grouting material is mainly applied to the field of repair of concrete cracks in hydraulic engineering. The solidified cement-based elastic grouting material has the characteristics of high binding strength with underwater concrete, high head permeation resistance, high corrosion resistance, high elasticity, adaptability to concrete crack vibration and deformation, and the like.

Description

technical field [0001] The invention relates to an engineering material, in particular to a grouting material for deep-water concrete crack repair. It uses cement, slag powder and rubber powder as base materials, and adds silica fume, gypsum powder, polyester fiber, water reducing agent, water-based latex and water-based curing agent in a certain proportion, and forms a groutable underwater non-dispersible after mixing with water. Plastomer, after consolidation, forms an elastic solid that is firmly bonded to the concrete crack interface, and is mainly used in the field of concrete crack repair in hydraulic engineering. After consolidation, cement-based elastic grouting material has the characteristics of high bond strength with underwater concrete, high water head penetration resistance, high corrosion resistance, high elasticity, and adaptability to concrete crack vibration and deformation. Background technique [0002] Cracks in hydraulic concrete structures are unavoi...

Claims

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Application Information

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IPC IPC(8): C04B28/14C04B24/26C04B24/28C04B111/74
CPCC04B24/2641C04B24/281C04B28/14C04B2111/74C04B2201/10C04B2201/50C04B7/02C04B18/141C04B18/146C04B24/24C04B24/20C04B16/0683C04B22/002
Inventor 陈迅捷韦华钱文勋欧阳幼玲张燕迟何旸胡金鹏
Owner NANJING HYDRAULIC RES INST
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