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A material for preventing freezing damage on the surface of concrete products

A concrete product and freeze damage technology, which is applied in the field of concrete product surface freeze damage prevention materials, can solve the problems of concrete performance degradation, insufficient durability, freeze-thaw damage, etc., and achieve the effects of improving weather resistance, increasing service life, and strong permeability

Active Publication Date: 2017-09-22
新疆西龙土工新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In cold areas with freezing periods, cracks appear on the surface of ordinary concrete during outdoor use, and then freeze-thaw damage often occurs. This is also one of the main factors leading to the deterioration of concrete performance and insufficient durability.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Preparation of materials for preventing freezing damage on the surface of 100kg concrete products:

[0018] a. According to the mass percentage, the viscosity is 20mm when the hydroxyl content is 8% and the temperature is 25°C 2 55.7kg of hydroxyl silicone oil per s, 5.0kg of γ-aminopropyltriethoxysilane, and 37.9kg of methyl tributanoximinosilane as a cross-linking agent were added to the reaction kettle in turn, and the stirring speed was 90 rpm At the same time, heat up the materials in the reactor, and when the temperature of the materials in the reactor reaches 45°C, open the vacuum valve, and start vacuuming in the reactor, the degree of vacuum is 0.096MPa, and the vacuuming time is 70 minutes;

[0019] b. Then add 0.5 kg of hexamethyldisilazane and 0.9 kg of dibutyltin dilaurate into the reaction kettle in turn, and continue to vacuumize for 40 minutes;

[0020] c. Finally, under the protection of nitrogen with a volume percentage of 99.99%, the product is seale...

Embodiment 2

[0022] Preparation of materials for preventing freezing damage on the surface of 100kg concrete products:

[0023] a. According to the mass percentage, the viscosity is 25mm when the hydroxyl content is 10% and the temperature is 25°C 2 / s Hydroxy silicone oil 55.4kg, γ-aminopropyltriethoxysilane 5.5kg, cross-linking agent vinyl tributylketoxime silane 37.5kg, add to the reaction kettle in turn, start stirring, stirring speed 100 rpm, At the same time, heat up the material in the reactor, and when the temperature of the material in the reactor reaches 55°C, open the vacuum valve, and start vacuuming in the reactor, the vacuum degree is 0.085MPa, and the vacuuming time is 90 minutes;

[0024] b. Then add 0.4 kg of hexamethyldisilazane and 1.2 kg of dibutyltin dilaurate into the reaction kettle in turn, and continue to vacuumize for 60 minutes;

[0025] c. Finally, under the protection of nitrogen with a volume percentage of 99.99%, the product is sealed and stored in cans to o...

Embodiment 3

[0027] 100kg concrete product surface freezing damage prevention material is prepared by the following method:

[0028] a. According to the mass percentage, the viscosity is 30mm when the hydroxyl content is 8% and the temperature is 25°C 2 / s Hydroxy silicone oil 55.1kg, γ-aminopropyltriethoxysilane 5.5kg, cross-linking agent is a mixture of methyl tributylketoxime silane 31.9kg and vinyl tributylketoxime silane 6.1kg and then added to the reaction After the kettle, start stirring, the stirring speed is 110 rpm, and at the same time, heat the materials in the reactor to raise the temperature. When the temperature of the materials in the reactor rises to 60°C, open the vacuum valve, and start vacuuming in the reactor. The vacuum degree is 0.096MPa. Vacuum time 50 minutes;

[0029] b. Then add 0.4 kg of hexamethyldisilazane and 1.0 kg of dibutyltin dilaurate into the reaction kettle in turn, and continue the vacuum reaction for 40 minutes;

[0030] c. Finally, under the prote...

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Abstract

The invention relates to a material for preventing freezing damage on the surface of concrete products, which is made of hydroxyl silicone oil, γ-aminopropyltriethoxysilane, crosslinking agent, hexamethyldisilazane and dibutyltin dilaurate to make. Add hydroxyl silicone oil, γ‑aminopropyltriethoxysilane, and crosslinking agent into the reaction kettle in sequence, start stirring, heat up, open the vacuum valve, start vacuuming, and then add hexamethyldisilazane and di Add butyl tin dilaurate into the reaction kettle in turn, continue the vacuum reaction, and finally put the product in cans and store it sealed under the protection of nitrogen to obtain the material for preventing freezing damage on the surface of finished concrete products. The material has small molecular weight, strong permeability, and can maintain good elasticity in the temperature range of 50°C-200°C. It has excellent weather aging resistance, high and low temperature resistance, and can improve the weather resistance of concrete products. When in use, the material is sprayed or painted on the surface of concrete products, which can effectively improve the anti-freeze damage performance of the surface of concrete products.

Description

technical field [0001] The invention relates to a material for preventing freezing damage on the surface of concrete products, which belongs to the field of building materials. Background technique [0002] Concrete is a porous and highly permeable material. When the outside temperature drops, the water in the capillary begins to freeze, gradually extends and expands, and generates inward pressure. When the pressure exceeds the tensile strength of the concrete, the capillary expands. Broken, micro-cracks are generated, and as the cracks continue to develop, the internal structure of the concrete is destroyed. In cold areas with freezing periods, cracks appear on the surface of ordinary concrete during outdoor use, and then freeze-thaw damage often occurs. This is also one of the main factors leading to the deterioration of concrete performance and insufficient durability. [0003] At present, in order to improve the frost resistance and durability of concrete, it is mostly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/06C08K5/00C08K5/544C08K5/5445C08K5/098
Inventor 王强张政委吕晶张全
Owner 新疆西龙土工新材料股份有限公司
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