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Preparation method of organosilicon cement waterproof agent capable of realizing self-repairing of cracks

A technology of silicone and waterproofing agent, which is applied in the field of waterproofing agent preparation, can solve the problems of long plastic retention time, less water reduction, cumbersome operation, etc., and achieve the effects of long plastic retention time, enhanced waterproofness and convenient operation

Inactive Publication Date: 2016-06-15
JIANGSU SHIKONG COATING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem mainly solved by the present invention: Although the current traditional waterproof agent is very effective in the initial stage, as time goes on, the performance degrades and loses the waterproof effect, resulting in poor waterproof performance, less water reduction, long plastic retention time, and difficult operation. The current situation is cumbersome, and a method is provided in which the prepared calcium silicate is used as a seed crystal, and then added to the silicone waterproof mixed slurry, concentrated by rotary evaporation, vacuum freeze-dried, supplemented with a complexing agent, and activated by mechanical grinding, so as to obtain Method of self-healing crack silicone cement waterproofing agent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0020] First, measure 80mL of saturated calcium hydroxide solution into a 500mL plastic bottle, place it on a magnetic stirrer for stirring, and add 20mL of sodium silicate solution with a concentration of 0.2mol / L dropwise twice during the stirring process, and the dropwise addition is completed Finally, seal the plastic bottle, put it into a vortex oscillator and vibrate for 10 minutes at a power of 20W, and then let it stand in an ice-water bath at 4°C for 2 days; then after standing, filter the mixture, separate the filter residue, and dry it in vacuum After drying, pour the filter residue into an agate mortar, grind it into powder and pass it through a 200-mesh standard sieve to obtain calcium silicate powder for use; then pour 1L hydrogen-containing silicone oil, 2L anhydrous Ethanol and 300g of potassium hydroxide powder, start the stirrer to stir and open the steam valve, pass in water vapor with a temperature between 90°C and keep it warm for 2 hours; after the reactio...

example 2

[0024]First, measure 90mL of saturated calcium hydroxide solution into a 500mL plastic bottle, place it on a magnetic stirrer for stirring, and add 25mL of sodium silicate solution with a concentration of 0.2mol / L dropwise in 3 times during the stirring process, and the dropwise addition is completed Finally, seal the plastic bottle, place it in a vortex shaker and oscillate for 13 minutes at a power of 25W, and then let it stand in an ice-water bath at 5°C for 2.5 days; then, after standing, filter the mixture, separate the filter residue, and dry it in vacuum After drying, pour the filter residue into an agate mortar, grind it into powder and pass through a 200-mesh standard sieve to obtain calcium silicate powder for use; then pour 1.5L hydrogen-containing silicone oil, 2.5L Anhydrous ethanol and 400g of potassium hydroxide powder, start the agitator to stir and open the steam valve, pass in water vapor with a temperature between 95°C and keep it warm for 3 hours; after the ...

example 3

[0027] First, measure 100mL of saturated calcium hydroxide solution into a 500mL plastic bottle, place it on a magnetic stirrer for stirring, and add 30mL of sodium silicate solution with a concentration of 0.2mol / L dropwise in 4 times during the stirring process, and the dropwise addition is completed Finally, seal the plastic bottle, place it in a vortex shaker for 15 minutes at a power of 30W, and then place it in an ice-water bath at 6°C for 3 days; then, after standing, filter the mixture, separate the filter residue, and dry it in vacuum After drying, pour the filter residue into an agate mortar, grind it into powder and pass through a 200-mesh standard sieve to obtain calcium silicate powder for later use; then pour 2L of hydrogen-containing silicone oil and 3L of anhydrous Ethanol and 500g of potassium hydroxide powder, start the stirrer to stir and open the steam valve, pass in water vapor with a temperature between 100°C and keep it warm for 4 hours; after the reactio...

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Abstract

The invention discloses a preparation method of a self-healing crack silicone cement waterproofing agent, which belongs to the technical field of waterproofing agent preparation. In the present invention, the prepared calcium silicate is used as a seed crystal, and then added to the organic silicon waterproof mixed slurry, concentrated by rotary evaporation, vacuum freeze-dried, supplemented with a complexing agent, and activated by mechanical grinding, thereby obtaining a self-healing crack silicone cement Preparation method of waterproofing agent. Examples prove that the operation of the present invention is simple and easy, and the water-repelling agent produced has a large amount of water reduction and a long plastic retention time. The hydrated cement particles undergo a hydration reaction to form dense hydration crystals to block the pores, capillaries and cracks of the concrete to achieve the purpose of waterproofing, and its self-repairing performance gradually increases the waterproofness over time.

Description

technical field [0001] The invention discloses a preparation method of a self-healing crack silicone cement waterproofing agent, which belongs to the technical field of waterproofing agent preparation. Background technique [0002] Water is an important substance that causes durability damage to cement concrete structures and reinforced concrete structures. Whether it is soft water erosion of cement concrete, freeze-thaw damage, alkali-aggregate reaction, corrosion of steel bars, or even the dissolution of hydraulic engineering and port structures, water is inseparable. Without the participation of water, most erosion will hardly occur. Therefore, waterproofing is an important measure, even a fundamental measure, to improve the durability of cement concrete structures. [0003] Silicone waterproofing agent is a non-polluting, non-irritating new type of high-efficiency waterproofing material, which is widely used in advanced countries in the world. After this product is spra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/65
CPCC04B40/0042C04B2103/65
Inventor 陈明生张帆林大伟
Owner JIANGSU SHIKONG COATING
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