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Anti-freezing concrete and preparation method thereof

A technology of concrete and cementitious materials, which is applied in the field of building materials, can solve the problems of limited contribution to concrete frost resistance, foaming, unstable foam stability, and weak air-entraining performance, so as to improve frost resistance and improve Effect of enhancing effect, good foaming and foam stabilizing properties

Pending Publication Date: 2022-07-29
咸阳鼎诚建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The air-entraining agent used in the prior art has unstable foaming and foam stability in concrete, weak air-entraining performance, and limited contribution to the frost resistance of concrete

Method used

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  • Anti-freezing concrete and preparation method thereof
  • Anti-freezing concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example 1

[0038] A kind of air-entraining agent, its preparation method is:

[0039] S1: 40 g of phenol, 40 g of 4-nonylphenol and 0.1 g of sodium hydride are mixed and heated, and the heating temperature is 60 ° C. Then, the initial reaction product is obtained after 40 min of reaction under vacuum conditions, and the initial reaction product is mixed with 800 g of ethylene oxide. Mix, continue to heat and keep the reaction process under a certain pressure state, the reaction obtains the reaction intermediate, the initial reaction product is mixed with ethylene oxide, and then the heating temperature is 100 ℃, and the heating time is 1h; the reaction process to obtain the reaction intermediate is maintained. The pressure is 0.2Mpa.

[0040] S2: The reaction intermediate is mixed with 6g phosphoric acid and 40g o-xylene and then heated, the heating temperature is 120°C, and the heating time is 16h, the obtained product is cooled, concentrated and washed under reduced pressure to obtain ...

preparation example 2

[0042] A kind of air-entraining agent, its preparation method is:

[0043] S1: 55g of phenol, 55g of 4-nonylphenol and 4g of sodium hydride are mixed and heated, and the heating temperature is 80° C. The initial reaction product is obtained after 60 min of reaction under vacuum conditions, and the initial reaction product is mixed with 1000g of ethylene oxide , continue to heat and keep the reaction process under a certain pressure state, the reaction obtains the reaction intermediate, the initial reaction product is mixed with ethylene oxide, and the heating temperature is 120 ℃, and the heating time is 2h; the reaction process to obtain the reaction intermediate maintains the pressure is 0.3Mpa.

[0044] S2: The reaction intermediate is mixed with 12 g phosphoric acid and 50 g o-xylene, and then heated. The heating temperature is 140° C. and the heating time is 20 h. The obtained product is cooled, concentrated and washed under reduced pressure to obtain an air-entraining ag...

preparation example 3

[0046] A kind of air-entraining agent, its preparation method is:

[0047] S1: 50g of phenol, 45g of 4-nonylphenol and 2g of sodium hydride are mixed and heated, and the heating temperature is 70° C. The initial reaction product is obtained after the reaction under vacuum conditions for 50min, and the initial reaction product is mixed with 900g of ethylene oxide. , continue to heat and keep the reaction process under a certain pressure state, the reaction obtains the reaction intermediate, the initial reaction product is mixed with ethylene oxide, and then the heating temperature is 110 ℃, and the heating time is 1.5h; the reaction process of obtaining the reaction intermediate remains The pressure is 0.25Mpa.

[0048]S2: The reaction intermediate is mixed with 9 g phosphoric acid and 45 g o-xylene and heated at a heating temperature of 130° C. and a heating time of 18 h. The obtained product is cooled, concentrated and washed under reduced pressure to obtain an air-entraining...

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Abstract

The invention relates to the technical field of building materials, and particularly discloses anti-freezing concrete and a preparation method thereof. The anti-freezing concrete comprises the following raw materials in parts by weight: 150-180 parts of water; 340 to 400 parts of a cementing material; 550 to 650 parts of fine aggregate; 1200 to 1400 parts of coarse aggregate; 2-4 parts of a water reducing agent; 0.01 to 0.03 part of an air entraining agent; the air entraining agent is prepared by heating, cooling and concentrating raw materials including an initiator, a catalyst, ethylene oxide, phosphoric acid and o-xylene. The method has the advantage of improving the frost resistance of the concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a frost-resistant concrete and a preparation method thereof. Background technique [0002] Ordinary concrete refers to an artificial stone made of cement as the main cementitious material, mixed with water, sand, and stone, if necessary, with chemical admixtures and mineral admixtures, mixed in appropriate proportions, and then stirred, compacted and cured. With the continuous development of concrete discipline and the continuous expansion of concrete application fields, the performance of concrete needs to be gradually diversified due to the influence of concrete construction conditions or the service environment of concrete structures. Generally, by adding admixtures, admixtures or other new materials etc. to improve the performance of concrete. [0003] Air-entraining admixture is one of the commonly used admixtures for concrete. It is a hydrophobic surfactant. Aft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B24/32C08G65/327C08G65/28C04B103/30C04B111/76
CPCC04B28/02C04B24/32C08G65/327C08G65/2612C04B2111/76C04B2201/50C04B2103/304C08G2650/04C04B18/08C04B14/00C04B2103/302
Inventor 黄晓松郝剑军张广辉屈超鹏李三张攀
Owner 咸阳鼎诚建材有限公司
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