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Concrete antalkaline agent

An anti-alkali agent and concrete technology, applied in the field of concrete anti-alkali agent, can solve the problems affecting the durability of concrete, affecting the external appearance of concrete, etc., and achieve the effects of alleviating the phenomenon of efflorescence, improving compactness and reducing speed

Inactive Publication Date: 2016-10-12
JIANGSU MINGHE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, too high alkali content will precipitate on the surface of concrete in a humid environment, forming pan-alkali, which affects the external appearance of concrete. In addition, it is easy to react with active aggregates and affect the durability of concrete.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of anti-alkali agent for concrete, in 100 parts by total weight, 3 parts of nano silicon dioxide, 1 part of polyvinyl alcohol, 10 parts of silica fume, 20 parts of mineral powder, 66 parts of low-calcium fly ash are mixed, poured Put it into a high-speed mixer and stir evenly, the stirring time is 5-10min, and it will be ready after discharging.

[0019] Nano-silica, polyvinyl alcohol, silica fume, mineral powder, and low-calcium fly ash are all industrial products. The particle size of nano silica is 10-30nm; the particle size of silica fume is 100-300nm, and the mass content of silica in silica fume is 98%; the degree of alcoholysis of polyvinyl alcohol is 88-92%; The specific surface area is 420m 2 / kg, the specific surface area of ​​low calcium fly ash is 380m 2 / kg

Embodiment 2

[0021] The difference with Example 1 is that, based on 100 parts of total weight, 5 parts of nano silicon dioxide, 2 parts of polyvinyl alcohol, 15 parts of silica fume, 30 parts of mineral powder, and 48 parts of low-calcium fly ash are mixed, poured Put it into a high-speed mixer and stir evenly, the stirring time is 5-10min, and it will be ready after discharging.

Embodiment 3

[0023] The difference with Example 1 is that, based on 100 parts of total weight, 3 parts of nano silicon dioxide, 2 parts of polyvinyl alcohol, 11 parts of silica fume, 26 parts of mineral powder, and 58 parts of low-calcium fly ash are mixed, poured Put it into a high-speed mixer and stir evenly, the stirring time is 5-10min, and it will be ready after discharging.

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Abstract

The invention discloses a concrete antalkaline agent which comprises the following components in parts by weight: 3-5 parts of nano-silica, 1-2 parts of polyvinyl alcohol, 10-15 parts of silica fume, 20-30 parts of mineral powder and 48-66 parts of low calcium fly ash, totaling 100 parts. The invention has the advantages that the concrete antalkaline agent is prepared by introducing a plurality of active materials, calcium hydroxide generated in a cement hydration process is rapidly absorbed, and high-strength micro-crystals are produced, so that the compaction of mortar and concrete members is greatly improved. Meanwhile, by introducing resin materials, the speed of allowing calcium hydroxide to diffuse to the surface is reduced, and a saltpetering phenomenon on the concrete surface is effectively relieved.

Description

technical field [0001] The invention relates to a concrete anti-alkali agent. Background technique [0002] Calcium hydroxide is a needle-like crystal, a product of cement hydration. On the one hand, it increases the alkalinity of the concrete system and protects the internal steel bars from corrosion. On the other hand, it is enriched in the interface transition zone between aggregate and cement stone, reducing the mechanical properties of concrete. [0003] However, too high alkali content will precipitate on the surface of concrete in a humid environment, forming pan-alkali, which affects the external appearance of concrete. In addition, it is easy to react with active aggregates and affect the durability of concrete. Contents of the invention [0004] Purpose of the invention: In view of the above problems, the purpose of the present invention is to provide a concrete anti-alkali agent, which can effectively alleviate the efflorescence phenomenon on the surface of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B14/06C04B18/08C04B18/12C04B18/14C04B20/00C04B103/60
CPCC04B40/0039C04B2103/603C04B14/062C04B18/146C04B24/2623C04B18/12C04B18/08C04B20/008Y02W30/91
Inventor 蒋临生臧军马涛
Owner JIANGSU MINGHE GRP
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