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Concrete air entraining agent as well as preparation and application thereof

An air-entraining agent and concrete technology, which is applied in the field of concrete air-entraining agents, can solve the problems of weakening the freeze-thaw resistance of concrete, the air-entraining performance of the air-entraining agent being reduced, and the life of the bubbles being shortened, so as to achieve high stability of the bubble structure, High foaming efficiency and improved air entrainment performance

Active Publication Date: 2020-12-11
CONSTR COMPANY OF CHINA RAILWAY NO 8 ENGNEERING GRP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this plateau low-pressure environment, the stability of the bubbles becomes worse, the volume of the bubbles is large and uneven, and the lifetime of the bubbles is shortened by about 50%. Freeze-thaw resistance of concrete

Method used

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  • Concrete air entraining agent as well as preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Weigh 30 parts of triterpene saponins, 40 parts of sodium lauryl sulfate, 5 parts of silicone polyether emulsion, 2 parts of polyethoxy propoxylated alcohol ether, 1 part of polymaleic acid, 10 parts of hydroxyethyl Cellulose, 8 parts of nano silica, 500 parts of deionized water.

[0027] Put triterpene saponin, sodium lauryl sulfate, deionized water and silicone resin polyether emulsion into a 100ml beaker, stir (400 rpm) for 1 minute, then add polymaleic acid, polyethoxypropyl Oxylated alcohol ether, hydroxyethyl cellulose and nano-reinforced particles, and stirred at high speed (400 rpm) for 2 minutes after each addition.

[0028] Pour clean water into the constant temperature digital display water bath, and set the temperature to 45°C with the dial; when the digital display of the water bath reaches the set temperature, place the beaker containing the mixture in the water bath and stir with a glass rod while heating in the water bath.

[0029] After 5 minutes, the ...

Embodiment 2

[0031]Weigh 30 parts of modified rosin thermal polymer, 50 parts of sodium lauryl sulfate, 7 parts of silicone resin polyether emulsion, 4 parts of polyethoxy propoxylated alcohol ether, 15 parts of hydroxyethyl cellulose, 11 parts Parts of nano calcium carbonate, 500 parts of deionized water.

[0032] Put the weighed modified rosin thermal polymer, sodium lauryl sulfate, deionized water and silicone resin polyether emulsion into a 100ml beaker, stir (400 rpm) for 1 minute, and then add polyethylene oxide propoxylated alcohol ether, hydroxyethyl cellulose and nano-reinforced particles, and stirred (400 rpm) for 2 minutes after each addition.

[0033] Pour clean water into the constant temperature digital display water bath, and set the temperature to 45°C with the dial; when the digital display of the water bath reaches the set temperature, place the beaker containing the mixture in the water bath and stir with a glass rod while heating in the water bath.

[0034] After 5 min...

Embodiment 3

[0036] Weigh 20 parts of fatty alcohol polyoxyethylene ether sodium sulfate, 30 parts of sodium dodecylbenzenesulfonate, 40 parts of sodium dodecyl sulfate, 5 parts of silicone resin polyether emulsion, 5 parts of polyacrylamide, 5 parts of poly Maleic acid, 20 parts of hydroxyethyl cellulose, 10 parts of nano silicon dioxide, 5 parts of nano calcium carbonate, 500 parts of deionized water.

[0037] Put fatty alcohol polyoxyethylene ether sodium sulfate, sodium dodecylbenzenesulfonate, sodium dodecylsulfate, deionized water and silicone resin polyether emulsion into a 100ml beaker, stir (400 rpm) for 1 minute Finally, polyacrylamide, polymaleic acid, hydroxyethyl cellulose, and nano-reinforced particles were added in sequence, and stirred (400 rpm) for 2 minutes after each addition.

[0038] Pour clean water into the constant temperature digital display water bath, and set the temperature to 45°C with the dial; when the digital display of the water bath reaches the set tempera...

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Abstract

The invention provides a concrete air entraining agent, and belongs to the technical field of concrete admixtures. The concrete air entraining agent comprises the following components in parts by mass: 70-90 parts of a microbubble agent, 5-10 parts of a stabilizing agent, 3-5 parts of a dispersing agent, 10-20 parts of a thickening agent and 8-15 parts of nano reinforced particles. The invention also provides a preparation method of the concrete air entraining agent. According to the invention, the microbubble agent, the stabilizer, the dispersing agent, the thickening agent and the nano reinforced particles are added into the air entraining agent, so that the gas-liquid interfacial tension under plateau low air pressure is effectively reduced, the flexibility of a bubble liquid film is improved, the overall stability of bubbles is enhanced, and the air entraining performance of the air entraining agent under the plateau low air pressure environment is improved.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a concrete air-entraining agent and its preparation and application. Background technique [0002] The plateau area has the characteristics of high altitude, thin air, low air pressure and large temperature difference. The annual average temperature in the plateau area is low, the daily temperature difference and annual temperature difference are large, and the number of annual freeze-thaw cycles is more than 300 times. During the day, the sun is irradiated strongly, and the temperature rises to melt the ice in the concrete, and the temperature drops at night to cause the pore water in the concrete to freeze and expand. The performance of concrete deteriorates faster under the action of strong freeze-thaw. Concrete durability is the primary issue. [0003] At present, air is mainly used to improve the frost resistance of concrete. Since the middle of the last centu...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B103/30
CPCC04B40/0039C04B2103/304C04B24/10C04B24/16C04B24/42C04B24/32C04B24/2664C04B24/383C04B14/062C04B22/002C04B24/34C04B14/28C04B24/166C04B24/20C04B24/2652Y02W30/91
Inventor 兰旭丽李俊杰彭舸曾晓辉邓国兵敬国民李良龙广成冉华郑学军张健谢友均潘自立朱远平王保
Owner CONSTR COMPANY OF CHINA RAILWAY NO 8 ENGNEERING GRP
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