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Concrete product surface frozen damage prevention material

A technology for concrete products and freezing damage, which is applied to the field of frost damage prevention materials on the surface of concrete products, can solve the problems of concrete performance deterioration, insufficient durability, freeze-thaw damage, etc., and achieves the effects of improving weather resistance, increasing service life, and strong permeability

Active Publication Date: 2015-09-23
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 concrete product surface frozen damage prevention material. The concrete product surface frozen damage prevention material is formed by hydroxyl silicone oil, y-aminopropyl triethoxysilane, cross-linking agents, hexamethyldisilazane and dibutyltin dilaurate. The hydroxyl silicone oil, the y-aminopropyl triethoxysilane and the cross-linking agents are sequentially added into a reaction still, and the reaction still is started to blend and heat the mixture; a vacuum valve is turned on to start to vacuumize; the hexamethyldisilazane and the dibutyltin dilaurate are sequentially added into the reaction still, vacuumizing and reacting are continued; finally, a product is canned,, sealed and stored under the protection of nitrogen, and the finished concrete product surface frozen damage prevention material is obtained. The material is small in molecular weight, high in permeability and capable of keeping good elasticity within the temperature ranging from minus 50 DEG C to 200 DEG C and has remarkable weather ageing resistance and high-temperature and low-temperature resistance, and therefore the weather resistance of concrete products can be improved. In the using process, the material is sprayed or brushed to the surfaces of the concrete products, and the frozen damage resistance of the surfaces of the concrete products can be effectively improved.

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 Applications(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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