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A kind of concrete anti-crack curing agent and preparation method thereof

A technology for concrete and curing agent, applied in the field of concrete curing agent, can solve problems such as inability to meet construction requirements, and achieve the problems of water conservation and maintenance, shrinkage and cracking, improvement of interface strength and wear resistance, and prevention of shrinkage and cracking. Effect

Active Publication Date: 2015-09-16
SINOHYRDO ENG BUREAU 3 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of concrete curing agents on the market cannot meet the construction requirements

Method used

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  • A kind of concrete anti-crack curing agent and preparation method thereof
  • A kind of concrete anti-crack curing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The concrete anti-crack curing agent of the present embodiment is made of the following raw materials in mass percentage: 40% of nano-silica sol, 20% of lithium silicate, 10% of metasilicate, 1% of sodium borate, water-based silane coupling agent (KH- 550) 5%, the balance is deionized water.

[0020] The preparation method is as follows: put 24kg of deionized water, 10kg of metasilicate, 1kg of sodium borate and 5kg of water-based silane coupling agent (KH-550) into the reactor in sequence, stir and react at 60°C for 30min, and then lower the temperature of the reactor to Raise to 85°C, then add 40kg of nano-silica sol and 20kg of lithium silicate into the reaction kettle, and continue to stir and react for 30min to obtain the concrete anti-cracking curing agent.

Embodiment 2

[0022] The concrete anti-crack curing agent of the present embodiment is made of the following raw materials in mass percentage: 30% of nano-silica sol, 25% of lithium silicate, 15% of metasilicate, 2% of sodium borate, water-based silane coupling agent (KH- 560) 2%, and the balance is deionized water.

[0023] The preparation method is as follows: put 26kg of deionized water, 15kg of metasilicate, 2kg of sodium borate and 2kg of water-based silane coupling agent (KH-560) into the reactor in sequence, stir and react at 80°C for 30min, and then lower the temperature of the reactor to Raise to 100°C, then add 30kg nano-silica sol and 25kg lithium silicate into the reaction kettle, continue to stir and react for 30min to obtain concrete anti-crack curing agent.

Embodiment 3

[0025] The concrete anti-crack curing agent of the present embodiment is made of the following raw materials in mass percentage: 50% of nano-silica sol, 15% of lithium silicate, 5% of metasilicate, 0.5% of sodium borate, water-based silane coupling agent (KH- 570) 10%, the balance is deionized water.

[0026] The preparation method is as follows: put 19.5kg deionized water, 5kg metasilicate, 0.5kg sodium borate and 10kg water-based silane coupling agent (KH-570) into the reaction kettle in turn, stir and react at 70°C for 30min, and then put the reaction The temperature of the kettle was raised to 90° C., and then 50 kg of nano-silica sol and 15 kg of lithium silicate were added to the reaction kettle, and the stirring reaction was continued for 30 minutes to obtain a concrete anti-crack curing agent.

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Abstract

The invention discloses a concrete anti-cracking curing agent. The concrete anti-cracking curing agent is prepared from the following raw materials by weight percent: 30%-50% of nano-silica sol, 15%-25% of lithium silicate, 5%-15% of metasilicic acid, 0.5%-2% of sodium borate, 2%-10% of a water-based silane coupling agent and the balance of deionized water. In addition, the invention also provides a preparation method of the curing agent. The curing agent is a colorless transparent liquid; the nano-silica sol is taken as the major raw materials, and then the silane coupling agent, the sodium borate, the lithium silicate and the metasilicic acid are added for modification which is completed through a high-temperature reaction in a reaction kettle; the curing agent has the characteristics of no toxicity, no objectional odor, inflaming retarding, no pollution and the like, and is harmless to the human skin and easy cleaning. The curing agent is capable of improving the surface hardening strength, the penetration resistance and the durability of the concrete, and is also capable of preventing the shrinkage and crazing of the concrete; the problems of water-retention maintenance as well as shrinkage and crazing of the new poured concrete are solved, and as a result, the interfacial strength and the wear-resisting property of the concrete are obviously improved.

Description

technical field [0001] The invention belongs to the technical field of concrete curing agents, and in particular relates to a concrete anti-crack curing agent and a preparation method thereof. Background technique [0002] For cement concrete construction in hydropower, water conservancy, railway, highway and other projects, the concrete maintenance is one of the key links of project quality. [0003] The purpose of concrete maintenance is to create various conditions to fully hydrate the cement and meet the performance and technical requirements of concrete; the second is to prevent abnormal shrinkage, cracks, cracks and other conditions after the concrete is formed. Concrete strength reduction and other damage phenomenon. [0004] Concrete curing process: Sprinkling and covering curing is the most commonly used heat preservation and moisturizing curing method. The general curing period is 7-14 days, and the curing period with special requirements for high-performance conc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/45
Inventor 赵建明谢凯军
Owner SINOHYRDO ENG BUREAU 3 CO LTD
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