Preparation method of concrete anti-freezing agent

An antifreeze and concrete technology, applied in the field of concrete antifreeze preparation, can solve problems such as the performance decline of concrete antifreeze, and achieve the effects of stable bubbles, equal size and enhanced electronegativity

Inactive Publication Date: 2018-12-21
CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a preparation method of concrete antifreeze in view of the defect that the performance of concrete antifreeze is reduced at low temperature

Method used

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  • Preparation method of concrete anti-freezing agent

Examples

Experimental program
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Effect test

example 1

[0028]In parts by weight, take 20 parts of methoxypolyethylene glycol, 12 parts of methacrylic acid and 1.0 part of hydroquinone and put them into a four-necked flask equipped with a thermometer, a stirrer and a condenser tube, and heat the four-necked flask. Heat the flask to 88°C and keep it warm for 10 minutes to obtain a molten product; add dropwise a sulfuric acid solution with a mass fraction of 3% of the above-mentioned molten product and a mass fraction of 85% to the above four-necked flask, heat the four-necked flask to 120°C, react at a constant temperature for 3 hours, and cool naturally To room temperature, dropwise add a 20% sodium hydroxide solution to neutrality to obtain a coagulation solution; in parts by weight, weigh 30 parts of the above coagulation solution, 18 parts of acrylamide and 1 part of ammonium persulfate into In the reaction kettle, pass nitrogen into the reaction kettle to replace the air, heat the temperature inside the reaction kettle to 60°C, ...

example 2

[0030] In parts by weight, take 22 parts of methoxypolyethylene glycol, 13 parts of methacrylic acid and 1.3 parts of hydroquinone and put them into a four-necked flask equipped with a thermometer, a stirrer and a condenser, and heat the four-necked flask. Heat the flask to 90°C and keep it warm for 13 minutes to obtain a molten product; add dropwise a sulfuric acid solution with a mass fraction of 4% of the above-mentioned molten product and a mass fraction of 87% into the above four-necked flask, heat the four-necked flask to 125°C, react at a constant temperature for 3 hours, and cool naturally to room temperature, dropwise add a 25% sodium hydroxide solution to neutrality to obtain a coagulation solution; in parts by weight, weigh 33 parts of the above coagulation solution, 19 parts of acrylamide and 2 parts of ammonium persulfate into In the reaction kettle, feed nitrogen into the reaction kettle to replace the air, heat the temperature in the reaction kettle to 63°C, stir...

example 3

[0032] In parts by weight, weigh 24 parts of methoxypolyethylene glycol, 15 parts of methacrylic acid and 1.5 parts of hydroquinone into a four-necked flask equipped with a thermometer, a stirrer and a condenser tube, and heat the four-necked flask. Heat the flask to 92°C and keep it warm for 15 minutes to obtain a molten product; add dropwise a sulfuric acid solution with a mass fraction of 5% of the above-mentioned molten product and a mass fraction of 90% to the above-mentioned four-necked flask, heat the temperature of the four-necked flask to 130°C, react at a constant temperature for 4 hours, and cool naturally To room temperature, add dropwise a 30% sodium hydroxide solution to neutrality to obtain a coagulation solution; in parts by weight, weigh 35 parts of the above coagulation solution, 20 parts of acrylamide and 3 parts of ammonium persulfate into In the reaction kettle, feed nitrogen into the reaction kettle to replace the air, heat the temperature in the reaction ...

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Abstract

The invention relates to a preparation method of a concrete anti-freezing agent and belongs to the technical field of concrete anti-freezing agent preparation. The preparation method comprises the following steps: preparing reaction liquid from methoxy polyethylene glycol, acrylamide and other auxiliaries; mixing methyl triethoxysilane and quaternary ammonium polyether-based trimethoxy silane, andreacting to obtain reaction powder; mixing fatty alcohol-polyoxyethylene ether, sulfamic acid and the reaction powder, and reacting to obtain a reaction emulsion; finally, stirring and mixing the reaction liquid, the reaction emulsion and other auxiliaries to obtain the concrete anti-freezing agent. According to the preparation method provided by the invention, a nonpolar amide group is introduced into a polycarboxylate water reducing agent, thus the concentration of carboxylate ions is lowered; the carboxylate ions adsorb cement particles, then the electronegativity on the surfaces of the cement ions is enhanced, and aggregation of the cement particles is prevented; by introducing bubbles into concrete, the capillary tubes in the concrete become thinner, thus the concrete strength is maintained, and the anti-freezing ability can be effectively improved; therefore, the preparation method has a broad application prospect.

Description

technical field [0001] The invention relates to a method for preparing a concrete antifreeze, belonging to the technical field of concrete antifreeze preparation. Background technique [0002] Concrete is a widely used building material. Admixtures can modify concrete and are indispensable and important additives in the application process of concrete, which can improve construction efficiency and application performance of concrete. [0003] In winter construction in northern my country, when the temperature is lower than the concrete hydration freezing point, the hydration process of the cement will be greatly affected, thereby affecting its compressive strength, and the ice swelling force will cause the internal structure of the concrete to be damaged. Damage to the concrete will also adversely affect the strength and durability of the concrete. Based on the above problems, certain methods should be adopted to solve the problem of antifreeze of concrete during low tempera...

Claims

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Application Information

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IPC IPC(8): C04B24/42C04B24/26C04B24/16C08F290/06C08F220/56C04B103/60C04B103/30
CPCC04B24/166C04B24/2658C04B40/0039C04B2103/302C04B2103/304C04B2103/601C08F290/062C04B24/42C04B22/085C04B22/147C08F220/56
Inventor 谷珍菊蒋梦成陈帅
Owner CHANGZHOU SIYU ENVIRONMENTAL PROTECTION MATERIAL SCI & TECH
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