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Preparation method of self-repair anti-crack concrete waterproofing agent

A concrete waterproofing agent and self-healing technology, which is applied in the preparation of organic compounds, carboxylate, and carboxylate, etc., can solve the problem of inability to compensate for concrete shrinkage cracks, deterioration of concrete waterproof and impermeability, and reduction of concrete hydration. Reaction heat and other problems, to achieve the effect of improving compactness, improving waterproof and impermeability, and improving crack resistance

Inactive Publication Date: 2017-05-17
闫博文
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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: aiming at the fact that the existing concrete waterproofing agent cannot compensate the shrinkage cracks of concrete, which leads to the deterioration of concrete waterproof and anti-seepage performance, and the existing concrete waterproofing agent still has the defects of single performance and insufficient function, providing A method of using calcium gluconate and calcium silicate as anti-cracking substances, adding organic silicon waterproof material, and then cooperating with cellulose and oil emulsion to prepare a self-repairing anti-cracking concrete waterproofing agent. The invention first uses hydrogen-containing silicone oil in the React under alkaline conditions to form silicone resin, then react the calcined egg shell with water, and then react with gluconic acid to obtain calcium gluconate. The combination of calcium gluconate and calcium silicate can reduce the heat of hydration reaction of concrete and reduce The interior of the concrete heats up to reduce cracks, and calcium gluconate can react with unreacted cement to form dense hydration crystals to seal the cracks of concrete, and then cooperate with castor oil and other oils to achieve the purpose of waterproofing. The self-repairing The anti-crack concrete waterproofing agent has a good shrinkage compensation function, which effectively improves the anti-cracking, waterproof and impermeable performance of concrete, and the amount of waterproofing agent is small, which can improve the early strength of concrete, adjust the setting time, and improve the durability of concrete. Has broad application prospects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First measure 100mL of hydrogen-containing silicone oil into a three-necked flask with a thermometer and a reflux device, and place it in an oil bath, raise the temperature to 80°C, then add 200mL of 15% sodium hydroxide solution, and magnetically stir for 2 hours After the reaction is over, add 10g of tetramethylammonium hydroxide to the flask, heat up to 130°C, stir for 3 hours, let it cool naturally, let it stand for layers, collect the organic layer, and set aside; then take 400g of egg shells , washed with water for 3 times, put the cleaned eggshells in a pulverizer to crush them, and passed through an 80-mesh sieve, collected the sieved material, and placed them in a muffle furnace, calcined at 1000°C for 2 hours, and allowed them to Cool to room temperature to obtain a calcined product, take 100g of the calcined product and put it in a beaker, then add 1L of water, stir and react for 40 minutes to obtain a reaction solution; then add 120mL of a 25% gluconic acid s...

example 2

[0021] First, measure 150mL of hydrogen-containing silicone oil into a three-necked flask with a thermometer and a reflux device, and place it in an oil bath, raise the temperature to 85°C, then add 250mL of 15% sodium hydroxide solution, and magnetically stir for 2 hours After the reaction is over, add 13g of tetramethylammonium hydroxide to the flask, raise the temperature to 135°C, stir and react for 3 hours, let it cool naturally, let it stand for layers, collect the organic layer, and set aside; then take 450g of egg shells , washed with water for 4 times, put the cleaned eggshells in a pulverizer to crush them, and passed through a 90-mesh sieve, collected the sieved material, and put them in a muffle furnace, calcined at 1050°C for 2 hours, and let it Cool to room temperature to obtain a calcined product. Take 150 g of the calcined product and put it in a beaker, then add 1 L of water, stir and react for 45 minutes to obtain a reaction solution; After the dropwise addit...

example 3

[0024] First, measure 200mL of hydrogen-containing silicone oil into a three-necked flask with a thermometer and a reflux device, and place it in an oil bath, raise the temperature to 90°C, then add 300mL of 15% sodium hydroxide solution, and magnetically stir for 3 hours After the reaction, add 15g of tetramethylammonium hydroxide to the flask, raise the temperature to 140°C, stir and react for 4 hours, let it cool naturally, let it stand for layers, collect the organic layer, and set aside; then take 500g of egg shells , washed 5 times with water, put the cleaned eggshells in a pulverizer to crush them, and pass through a 100-mesh sieve, collect the sieved material, and put it in a muffle furnace, calcined at 1100°C for 3 hours, and let it go with the furnace Cool to room temperature to obtain a calcined product, put 200g of the calcined product in a beaker, add 2L of water, stir and react for 50 minutes to obtain a reaction solution; then add 150mL of 25% gluconic acid solut...

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Abstract

The invention discloses a preparation method of a self-repair anti-crack concrete waterproofing agent, and belongs to the technical field of concrete admixture preparation. Hydrogen-containing silicone oil reacts under an alkaline condition to obtain silicone resin, calcined egg shells react with water and then react with gluconic acid to obtain calcium gluconate, the compounding of calcium gluconate and calcium silicate can reduce the hydration reaction heat of concrete and reduce the internal temperature rise of concrete, so as to reduce cracks, calcium gluconate can react with unreacted concrete to form dense hydration crystals to plug off the cracks of concrete, and calcium gluconate can achieve the purpose of waterproofing together with castor oil or other oil substances. The obtained self-repair anti-crack concrete waterproofing agent with the preparation method of the invention has good shrinkage compensation function, and effectively improves the anti-crack property, waterproof property and water impermeability of concrete; the admixture amount of the waterproofing agent is less, the early strength of concrete is increased, setting time is adjusted, and the durability of concrete is improved. The self-repair anti-crack concrete waterproofing agent has broad application prospects.

Description

technical field [0001] The invention discloses a preparation method of a self-repairing anti-crack concrete waterproofing agent, which belongs to the technical field of preparation of concrete admixtures. Background technique [0002] Waterproofing is an important measure, even a fundamental measure, to improve the durability of cement concrete structures. The waterproof performance of cement concrete structure basically determines its durability. Whether it is soft water erosion of cement concrete, freeze-thaw damage, alkali-aggregate reaction, steel bar corrosion and sulfate corrosion, etc., or steel bar oxidation corrosion in cement concrete, or even the dissolution of hydraulic and port structures, it is inseparable from the role of water. , without the participation of water, most of the erosion will hardly occur. In addition, due to the micro-cracks that may exist between the aggregate and the cementitious material in the cement concrete, moisture can continue to pen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B24/10C04B28/00C07C51/41C07C59/105C04B103/65
CPCC04B40/0039C04B24/10C04B24/42C04B28/00C04B2103/65C04B2111/27C04B2201/50C07C51/412C04B24/08C04B24/20C04B24/34C04B24/383C04B22/08C04B14/06C04B14/00C04B22/002C07C59/105
Inventor 闫博文孟浩然薛国忠
Owner 闫博文
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