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Concrete seal curing agent

A sealing curing agent and concrete technology, which is applied in the field of building materials, can solve the problems of unsatisfactory improvement of the water resistance of concrete structures, and achieve the effect of improving hardness and increasing hydrophobicity

Active Publication Date: 2014-11-19
上海牧桔新型材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Concrete sealing and curing agent is a multi-component chemical reagent with low viscosity. After being coated on the surface of the concrete structure, it can quickly penetrate into the interior of the concrete structure due to capillary action and react with the free calcium inside to form an insoluble amorphous state. Calcium silicate hydrate can block the pores of concrete structures and improve their hardness and water resistance. However, the existing concrete sealing and curing agents are not ideal for improving the water resistance of concrete structures.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of concrete sealing curing agent, it is made up of following components: Lithium silicate 50wt%, isobutyltriethoxysilane 30wt%, polydimethylsiloxane 1wt%, anatase type nano titanium dioxide (particle size 5 ~15nm) 2wt%, fluorocarbon surfactant (FSJ, DuPont, USA) 0.01wt%, silicone defoamer (2-3168, Dow Corning, USA) 0.01wt%, and the balance of water.

[0037] Mix the above components and stir at room temperature for 3 hours to obtain a homogeneous milky white liquid, which is the concrete sealing and curing agent.

[0038] Spray the concrete sealing and curing agent prepared above on the concrete surface, and grind and polish after half an hour. After grinding and polishing, the thickness of the hardened layer formed on the concrete surface can reach 3-5mm. The concrete surface is tested, and the results show that the brightness of the concrete surface is 40-50 degrees, the Mohs hardness is 7, the water absorption rate is 0.45%, and the water drop contact angle is...

Embodiment 2

[0040] A concrete sealing curing agent, it is made up of following components: Lithium silicate 60wt%, isobutyltriethoxysilane 20wt%, polydimethylsiloxane 2wt%, anatase type nano-titanium dioxide (particle size 5 ~15nm) 2wt%, fluorocarbon surfactant (FSJ, DuPont, USA) 0.01wt%, silicone defoamer (2-3168, Dow Corning, USA) 0.01wt%, and the balance of water.

[0041] Mix the above components and stir at room temperature for 3 hours to obtain a homogeneous milky white liquid, which is the concrete sealing and curing agent.

[0042] Spray the concrete sealing and curing agent prepared above on the concrete surface, and grind and polish after half an hour. After grinding and polishing, the thickness of the hardened layer formed on the concrete surface can reach 2-3mm. The concrete surface was tested, and the results showed that the brightness of the concrete surface was above 60 degrees, the Mohs hardness was 8, the water absorption rate was 0.52%, and the water drop contact angle w...

Embodiment 3

[0044] A concrete sealing and curing agent, which consists of the following components lithium silicate 70wt%, isobutyltriethoxysilane 25wt%, polydimethylsiloxane 2wt%, anatase nano titanium dioxide (particle diameter 5~ 15nm) 2wt%, fluorocarbon surfactant (FSJ, U.S. DuPont) 0.01wt%, organosilicon defoamer (2-3168, U.S. Dow Corning) 0.01wt% and the rest of water.

[0045]Mix the above components and stir at room temperature for 3 hours to obtain a homogeneous milky white liquid, which is the concrete sealing and curing agent.

[0046] Spray the concrete sealing and curing agent prepared above on the concrete surface, and grind and polish after half an hour. After grinding and polishing, the thickness of the hardened layer formed on the concrete surface can reach 3-4mm. The concrete surface is tested, and the result shows that the brightness of the concrete surface is above 50 degrees, the Mohs hardness is 7, the water absorption rate is 0.58%, and the water drop contact angle ...

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PUM

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Abstract

The invention provides a concrete seal curing agent which comprises the following components in percentage by weight: 50%-70% of silicate, 10%-30% of a silane coupling agent, 1%-3% of nano titanium dioxide and the balance of water. After the concrete seal curing agent provided by the invention is applied to the surface of a concrete structure, silicate in the concrete seal curing agent can quickly permeate into concrete and reacts with free calcium to generate insoluble amorphous calcium silicate hydrate so as to block the fine pores of the concrete structure and improve the hardness of the concrete structure; meanwhile, the silane coupling agent and nano titanium dioxide in the curing agent interact to form a hydrophobic membrane layer on the surface of the concrete structure and improve the surface hydrophobicity of the concrete structure; the experimental result shows that the surface Mohs hardness is higher than 7, the water absorption rate is lower than 0.6%, and the liquid drop contact angle is less than 95 degrees after the surface of the concrete structure is coated with the concrete seal curing agent provided by the invention.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a concrete sealing and curing agent. Background technique [0002] Concrete refers to a mixture made of cement, granular aggregate, water, chemical admixtures and mineral admixtures that need to be added in an appropriate proportion. It has the advantages of economy, durability, fire resistance, and high compression resistance. It is one of the most important civil engineering materials in contemporary times. [0003] During the hardening process of concrete, the surface layer and the internal structure contain a large number of interpenetrating pores. As a result, during the service process of concrete structures, it is often difficult to resist the erosion of corrosive substances in the environment due to poor surface quality or insufficient compactness, resulting in the performance of concrete structures. The accelerated deterioration of concrete structures reduces the durab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/50
Inventor 陈志强胡德龙
Owner 上海牧桔新型材料有限公司
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