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A kind of concrete antifreeze and preparation method thereof

A technology of antifreeze and concrete, which is applied in the field of concrete antifreeze and its preparation, which can solve the problems that the antifreeze performance of concrete cannot be improved, and achieve the effects of reasonable distribution of hydration products, enhanced strength, and improved strength

Active Publication Date: 2022-07-01
山东高速集团有限公司创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Areas where antifreeze is required for construction usually have a strong demand for the antifreeze performance of concrete, but the antifreeze agents currently on the market cannot improve the antifreeze performance of concrete

Method used

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  • A kind of concrete antifreeze and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0016] An antifreeze agent for concrete comprises: 45 parts of modified calcium sulfate crystal whiskers, 8 parts of calcium formate, 10 parts of modified diatomaceous earth, 6 parts of urea, 20 parts of sodium lignosulfonate, and 11 parts of solid alcohol amine.

[0017] The preparation method of the modified calcium sulfate crystal whisker is as follows: the calcium sulfate crystal whisker is weighed and added to the modifier solution, stirred and reacted at 80° C. for 30 minutes, and then separated and dried. Wherein the modifier is sodium dodecylbenzenesulfonate, the mass ratio of calcium sulfate whisker to sodium dodecylbenzenesulfonate is 1:0.01; the stirring speed is 1000r / min.

[0018] The preparation method of the modified diatomite is as follows: weighing the diatomite, adding it into the modifier solution, stirring and reacting at 120° C. for 60 minutes, and then separating it. The modifier is KH570, the mass ratio of diatomite and modifier is 1:0.05, and the stirri...

Embodiment 2

[0021] A concrete antifreeze, comprising: the composition of the concrete antifreeze is: 40 parts of modified calcium sulfate whiskers, 10 parts of calcium formate, 7 parts of modified diatomaceous earth, 8 parts of urea, 25 parts of sodium lignosulfonate, solid 10 parts of alcohol amines.

[0022] The preparation method of the modified calcium sulfate crystal whisker is as follows: the calcium sulfate crystal whisker is weighed and added to the modifier solution, stirred and reacted at 70° C. for 30 minutes, and then separated and dried. Wherein the modifier is sodium dodecylbenzenesulfonate, the mass ratio of calcium sulfate whisker and sodium dodecylbenzenesulfonate is 1:0.03; the stirring speed is 1000r / min.

[0023] The preparation method of the modified diatomite is as follows: weighing the diatomite, adding it into the modifier solution, stirring and reacting at 120° C. for 60 minutes, and then separating it. The modifier is KH570, the mass ratio of diatomite and modif...

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Abstract

The invention provides a concrete antifreeze and a preparation method thereof. The antifreeze of the present invention comprises 35-50 parts of modified calcium sulfate crystal whiskers, 5-10 parts of calcium formate, 6-12 parts of modified diatomaceous earth, 4-8 parts of urea, and 15-25 parts of sodium lignosulfonate, 8-15 parts of solid alcohol amine, the above parts are by weight. Through the combination, ratio and synergistic ratio of the above substances, a concrete antifreeze agent that can work at ‑30℃ is prepared, which improves the freeze-thaw resistance of concrete. Corrosion, has good durability.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a concrete antifreeze and a preparation method thereof. Background technique [0002] When the concrete does not reach the required strength, there is still a certain amount of water inside. After the ambient temperature reaches the freezing point of water, it promotes the transformation of the water phase into ice, which leads to the redistribution of water in the concrete and the formation of ice interlayers, resulting in concrete aggregates. The cohesion with the cement stone interface decreases, causing volume expansion, resulting in early freezing of concrete. In order to ensure the quality and progress of concrete in low temperature construction, it is necessary to add antifreeze. Antifreeze can harden concrete at negative temperature, and finally achieve the same quality as concrete cured at room temperature. [0003] The general idea of ​​antifreeze design is to reduc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B103/60
CPCC04B40/0039C04B2103/601C04B14/383C04B24/04C04B14/08C04B24/126C04B24/18C04B24/122C04B24/20C04B24/42
Inventor 申全军黄拓穆明浩杨耀辉
Owner 山东高速集团有限公司创新研究院
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