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Concrete superficial hardener and construction method thereof

A concrete surface and hardener technology, which is applied in the field of concrete structure surface treatment materials, can solve problems affecting normal production, human body and environmental hazards, and protection discounts, and achieve the effects of increasing hardness, improving mechanical strength, and improving performance

Inactive Publication Date: 2009-04-15
GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inherent process of cement hardening, concrete has unavoidable disadvantages: the microstructure contains a large number of interconnected pores
The local damage of the usual coating will also greatly reduce the protective effect
Partial repair is not only expensive, but also affects the normal production
Coatings usually contain a large amount of volatile organic solvents and reactive diluents, which are completely released into the atmosphere after coating, which is extremely harmful to human body and environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The composition and weight percent of this embodiment are sodium silicate (modulus 3.1-3.4): 32%, sodium hydroxide: 1.2%, sodium metaaluminate: 0.5%, Silwet L-77 of HELENA company: 0.5%, three Ethanolamine: 1%, the rest is water.

[0023] The above-mentioned wetting and dispersing agent, catalyst, stabilizer, silicate, and alkali are sequentially added into water, mixed and dispersed uniformly to obtain a hardener. Use the concrete hardener obtained in this embodiment to brush twice on the concrete surface that has been poured and maintained for a week, keep the surface in a wet state for one hour each time, and then maintain for 3 weeks. The water permeability of the treated concrete is greatly reduced, the powder does not fall off, the compressive strength is improved, and the gloss is obviously improved.

Embodiment 2

[0025] The composition and weight percent of this embodiment are sodium silicate (modulus 3.1-3.4): 25%, potassium methyl silicate: 2%, sodium ethyl silicate 3%, sodium hydroxide: 1.5%, metaaluminic acid Sodium: 1%, 3M Novec FC-4430: 0.1%, BYK-388: 0.2%, Triethanolamine: 1%, the rest is water.

[0026] The above-mentioned wetting and dispersing agent, catalyst, stabilizer, silicate, and alkali are sequentially added into water, mixed and dispersed uniformly to obtain a hardener. Use the concrete hardener obtained in this embodiment to roll-coat the concrete surface around pouring and curing twice, and keep the surface in a wet state for one hour each time. The water permeability of the polished concrete is greatly reduced, the powder does not fall off, the hardness is improved, and the gloss is obviously improved.

Embodiment 3

[0028] The composition and weight percent of this embodiment are potassium silicate (modulus 5): 39%, sodium methyl silicate: 4%, potassium hydroxide: 2%, potassium metaaluminate: 1%, DuPont Zonyl FS 300: 0.05%, BYK-388: 0.2%, glycerol: 2%, the others are water.

[0029] The above-mentioned wetting and dispersing agent, catalyst, stabilizer, silicate, and alkali are sequentially added into water, mixed and dispersed uniformly to obtain a hardener. Use the concrete hardener obtained in this embodiment to brush three times on the cleaned old concrete surface, and keep the surface in a wet state for one hour each time. The treated concrete does not fall powder and ash, the hardness is improved, and the impermeability is improved.

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Abstract

The invention discloses a concrete surface hardener and a construction method thereof, wherein, the concrete surface hardener comprises the compositions by weight percent of 10-40 percent of inorganic silicate, 1-10 percent of alkali, 0.1-5 percent of catalyst, 0.1-2 percent of wetting dispersant, 1-5 percent of stabilizer and rest of water. The hardener prepared by the invention is characterized by easily-obtained material, simple production and convenient construction, unhealthy and environmentally harmful VOC avoidance, etc. In addition, the hardener can penetrate into the interior of the concrete to seal the capillary of the concrete, thus improving the surface density of the concrete, strengthening the impervious capability and strength of the concrete and prolonging the service life of the concrete. As the hardener does not comprise unhealthy and environmentally harmful substances, the increasingly improved requirements of the present environmental protection can be met, thus having extensive application prospect.

Description

technical field [0001] The invention relates to a concrete structure surface treatment material, which is used for hardening and compacting the concrete surface. technical background [0002] Concrete is the foundation of modern society. It is directly or indirectly in contact with concrete in almost every aspect of daily production and life. It is widely used in various civil and architectural structures, such as various buildings, roads, bridges, dams and flood control. Embankments, piers, etc., human activities have been inseparable from the use of concrete. Concrete consists of coarse granular aggregates and cement hydrates. During concrete construction, the components of cement undergo a very complex chemical reaction with water to form hard hydrates, which bind the aggregates filled in it together to form a structure with high compressive strength. Concrete has the advantages of economy, durability, fire resistance, high compression resistance, etc., and is widely us...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50
CPCC04B41/52C04B41/009
Inventor 陈文广胡奇斌周子鹄
Owner GUANGZHOU SUPER CHEM COATING CO LTDGUANGZHOU SUPER CHEM COATING CO LTD
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