Concrete, air-entraining agent and preparation method for application in alpine and high-altitude regions

A concrete and high-altitude technology, used in concrete, concrete air-entraining agent, air-entraining agent and preparation fields in high-cold and high-altitude areas, can solve the problem that the air-entraining agent cannot be used in high-cold and high-altitude areas, and reduce freeze-thaw damage. effect, improve impermeability, reduce capillary action

Active Publication Date: 2020-08-18
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a concrete air-entraining agent and its preparation method for use in high-cold and high-altitude areas, so as to solve the problem that the air-entraining agents in the prior art cannot be used in high-cold and high-altitude areas. technical problem

Method used

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  • Concrete, air-entraining agent and preparation method for application in alpine and high-altitude regions
  • Concrete, air-entraining agent and preparation method for application in alpine and high-altitude regions

Examples

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Embodiment 1

[0039] This example provides a kind of concrete air-entraining agent used in high-cold and high-altitude areas, which is made of the following raw materials in parts by weight: 93% of triterpene saponin solution, 2.2% of modified polybutadiene resin, Modified polyacrylamide is 0.85%, sodium carbonate is 3.95%.

[0040] The number average molecular weight of the modified polybutadiene resin is 1000-30000; the number average molecular weight of the modified polyacrylamide is 10000-40000.

[0041] The preparation method of the concrete air-entraining agent applied to the alpine and high-altitude regions of the present embodiment comprises the following steps:

[0042] Step 1, prepare the preparation of triterpene saponin solution:

[0043] Weigh the acacia, remove surface dirt with a cleaning solution, expose the cleaned acacia to the sun for 3 to 5 days, and pulverize the dried acacia with a pulverizer to obtain acacia powder; mix the acacia powder with ethanol and acetone The...

Embodiment 2

[0057] This embodiment provides a kind of concrete air-entraining agent used in high-cold and high-altitude areas, which is made of the following raw materials in parts by weight: triterpene saponin solution is 92% to 95%, and modified polybutadiene resin is 1.8%-2.8%, modified polyacrylamide 0.7%-0.95%, sodium carbonate 2.5%-4.5%, and the sum of the parts by weight of raw materials is 100%.

[0058] This example provides a kind of concrete air-entraining agent used in high-cold and high-altitude areas, which is made of the following raw materials in parts by weight: 92% of triterpene saponin solution, 2.8% of modified polybutadiene resin, Modified polyacrylamide is 0.95%, sodium carbonate is 4.25%.

[0059] The modified polybutadiene resin is the same as in Example 1.

[0060] Modified polyacrylamide is the same as Example 1.

[0061] The preparation method of this embodiment is basically the same as that of Example 1.

[0062] The application effect of the concrete air-en...

Embodiment 3

[0064] This example provides a kind of concrete air-entraining agent used in high-cold and high-altitude areas, which is made of the following raw materials in parts by weight: 95% of triterpene saponin solution, 1.8% of modified polybutadiene resin, Modified polyacrylamide is 0.7%, sodium carbonate is 2.5%.

[0065] The modified polybutadiene resin is the same as in Example 1.

[0066] Modified polyacrylamide is the same as Example 1.

[0067] The preparation method of this embodiment is basically the same as that of Example 1.

[0068] The application effect of the concrete air-entraining agent prepared in this embodiment is basically the same as that in Example 1.

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Abstract

The invention provides a concrete and an air entraining agent which are used at high-cold and high-altitude areas, and a preparation method thereof. 100% of the air entraining agent is prepared from,by weight, 92 to 95% of a triterpenoid saponin solution, 1.8 to 2.8% of modified polybutadiene resin, 0.7 to 0.95% of modified polyacrylamide, 2.5 to 4.25% of sodium carbonate. Compared with conventional used triterpenoid saponin air entraining agents, water soluble resin modified polybutadiene resin and water soluble ion polymer modified polyacrylamide are added; the triterpenoid saponin possesses carbohydrate chains, is high in hydrophilic performance, and is capable of combining with modified polyacrylamide, so that bubble wall strength is increased, foaming is stabilized, bubble diameter is reduced, bubble film viscosity and strength are increased, and after bubble formation, the liquid film possesses enough continuity and elasticity.

Description

technical field [0001] The invention relates to the field of building materials, and relates to concrete air-entraining agents, in particular to concrete, air-entraining agents and preparation methods used in high-cold and high-altitude regions. Background technique [0002] The air-entraining agent can make the concrete produce a large number of uniform, stable and closed micro-bubbles during the mixing process, improve the workability of the concrete, and retain the micro-bubbles after the concrete hardens. Its main function is to improve the impermeability of the concrete performance, frost resistance, salt erosion resistance and durability. [0003] Under the conditions of alpine and high altitude climate, the temperature difference between day and night is large and the air pressure is low, and the freeze-thaw damage of concrete is more serious than in other areas. The introduction of tiny closed air bubbles into concrete by adding air-entraining agents is a common meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/26C04B28/00C04B103/30
CPCC04B28/00C04B40/0039C04B2103/304C04B2111/76C04B24/2611C04B24/2652C04B24/10C04B22/10C04B14/02C04B14/06C04B2103/302
Inventor 何锐王铜郑睢宁杨哲陈华鑫王振军
Owner CHANGAN UNIV
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