Liquid concrete anti-freezing agent

A concrete and antifreeze technology, applied in the field of liquid concrete antifreeze, winter construction engineering, can solve the problems of steel corrosion, methanol volatilization, alkali return, etc., to achieve durable service life, short setting time, slump maintained Effect

Inactive Publication Date: 2012-09-19
阳泉昌达混凝土搅拌站
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Methanol is volatile and toxic; chlorine salts will corrode steel bars and affect the service life of buildings; urea, ammonia, etc. release pungent odors, affecting quality of life; nitrites are carcinogenic and can easily lead to alkali-aggregate reaction in concrete, alkali return, etc. Undesirable phenomenon, affecting the use of buildings and the quality of appearance
The air-entraining

Method used

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  • Liquid concrete anti-freezing agent

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Experimental program
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Effect test

Embodiment 1

[0010] First, prepare polycarboxylate water reducer: put deionized water for production, polyisoprenyl methoxy macromonomer ether and maleic anhydride (the weight ratio of the three is 0.8:1:0.3) into the reactor , warming up to 75°C, adding hydrogen peroxide with a mass concentration of 35%, stirring, the weight ratio of the hydrogen peroxide to polyisoprenyl methoxy macromonomer ether is 0.001:1; warming up to 90°C, adding persulfuric acid dropwise Sodium and initiator solution, the weight ratio of sodium persulfate, initiator, and polyisoprenyl methoxy macromonomer ether is 0.001:0:002:1, and the initiator thioglycolic acid is added dropwise in 2-3 After hours of dripping, keep warm for 1-2 hours, after cooling down to 50°C, add a sodium hydroxide solution with a mass concentration of 30%, until the solution weight concentration in the reactor is about 40%, to obtain a polycarboxylate superplasticizer. Weigh 15 parts by weight of polycarboxylate high-performance water reduc...

Embodiment 2

[0012] The preparation method of the polycarboxylate high-performance water reducer is the same as in Example 1. Weigh 30 parts by weight of polycarboxylate high-performance water reducer, 0.1 part by weight of nonylphenol polyoxyethylene ether, 2 parts by weight of lithium sulfate and 5 parts by weight of triisopropanolamine, mix well, stir for 0.5h, add 50 Parts by weight of water can be stirred for 20 minutes.

[0013] The antifreeze of this embodiment was tested for performance, and the results are shown in Table 1.

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Abstract

The invention provides a liquid concrete anti-freezing agent, solving the problem of anti-freezing in winter construction of construction engineering. The liquid concrete anti-freezing agent is characterized by comprising the following components in part by weight: 10-25 parts of polycarboxylic acid high performance water reducing agent, 0.1-0.2 parts of nonylphenol ethoxylates, 1-3 parts of lithium sulfate, 2-5 parts of organic alcohol amine and 50-60 parts of water. The liquid concrete anti-freezing agent is prepared by uniformly mixing and stirring the components. The liquid concrete anti-freezing agent provided by the invention can be constructed at the temperature -5 to -20 DEG C, and has the advantages of nontoxic property, alkali-free property, chlorine-free property and ammonia-free release, proper water reducing amount, suitable concrete slump constant, short coagulation time, and good adaptability with cement. The liquid concrete anti-freezing agent obviously improves properties of concrete which is stirred just now and cured concrete, and can be widely applicable to a reinforced concrete structure in the winter construction.

Description

Technical field [0001] The invention belongs to the technical field of building material production, and in particular relates to a liquid concrete antifreeze, which is suitable for building construction in winter. Background technique [0002] In winter construction in northern my country, in order to ensure the quality of the project and prevent concrete from freezing damage, two protective measures are mainly taken. One is to use covering or enclosure heating methods to prevent the concrete temperature from dropping below 0°C. This method is costly and complicated to operate; The second is to add antifreeze to the concrete. This method has simple construction and good effect, so it has been widely used. So far, the antifreeze agents used in construction projects at home and abroad are all formulated with early strength components, antifreeze components and air-entraining components. Among them, the early strength components include sulfates, carbonates, nitrates, organic ...

Claims

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Application Information

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IPC IPC(8): C04B24/32
Inventor 陈志军王建龙赵海伟武俊平
Owner 阳泉昌达混凝土搅拌站
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