Slow-release coagulation-accelerating composite material, preparation method thereof and application of slow-release coagulation-accelerating composite material in cement-based material

A technology for cement-based materials and composite materials, applied in the field of building material additives, can solve problems such as affecting the microstructure of cement stone and affecting the hardening performance of cement-based materials, and achieve the effect of shortening the setting time and promoting the formation.

Active Publication Date: 2022-07-01
BOTE NEW MATERIALS TAIZHOU JIANGYAN CO LTD +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the above reports, the method of organic matter encapsulation is used to regulate the dissolution of coagulation-accelerating components, which is mostly used in the field of oil drilling, where the response mechanism for the dissolution of coagulation-accelerating components is high pressure or high temperature; however, in ordinary Portland cement, the release of organic matter encapsulation After adding accelerator components, it will affect the microstructure of cement stone, and then affect the hardening performance of cement-based materials

Method used

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  • Slow-release coagulation-accelerating composite material, preparation method thereof and application of slow-release coagulation-accelerating composite material in cement-based material
  • Slow-release coagulation-accelerating composite material, preparation method thereof and application of slow-release coagulation-accelerating composite material in cement-based material
  • Slow-release coagulation-accelerating composite material, preparation method thereof and application of slow-release coagulation-accelerating composite material in cement-based material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] First, 5.0 g of aluminum sulfate was prepared into a 20 wt% aluminum sulfate solution as an aqueous solution of an inorganic salt coagulant.

[0056] Then, a flask containing 200 g of ethanol was placed in an ultrasonic water tank, the ultrasonic dispersion was turned on, and the above-mentioned aluminum sulfate solution was added to the flask at a speed of 5 mL / h to 10 mL / h with a peristaltic pump, and aluminum sulfate particles were prepared by the anti-solvent method.

[0057] In the third step, 1.0g of ammonia water was added to the flask under ultrasonic stirring, and 20.0g of tetraethyl orthosilicate was added to the flask using a dropping funnel, and ultrasonically dispersed at 20°C to 30°C. In the reaction system, sulfuric acid was added. The aluminum particles are used as the growth point of micelles, and tetraethyl orthosilicate is hydrolyzed under the action of ammonia water, and undergoes a sol-gel reaction to generate porous nano-silica.

[0058] Finally, t...

Embodiment 2

[0061] First, 3.0 g of sodium aluminate and 4.0 g of sodium silicate were respectively prepared into a sodium aluminate solution and a sodium silicate solution of 20 wt %.

[0062] Then, place a flask containing 200 g of acetone in an ultrasonic water tank, turn on ultrasonic dispersion, and add the above-mentioned sodium aluminate solution and sodium silicate solution to the flask at a speed of 5 mL / h to 10 mL / h with a peristaltic pump. Preparation of sodium aluminate particles and sodium silicate particles.

[0063] In the third step, 1.0g of ammonia water and 0.5g of triethanolamine were added to the flask under ultrasonic stirring, and 10.0g of methyl orthosilicate and 15.0g of butyl orthosilicate were added to the flask using a dropping funnel. Ultrasonic dispersion at ℃, sodium aluminate particles and sodium silicate particles are used as micelle growth points in the reaction system, methyl orthosilicate and butyl orthosilicate are hydrolyzed under the action of ammonia ...

Embodiment 3

[0067] First, 4.0 g of aluminum sulfate, 3.0 g of sodium silicate, 2.0 g of magnesium fluorosilicate and 1.0 g of sodium fluorosilicate were respectively prepared into 20 wt% aluminum sulfate solution, sodium silicate solution, magnesium fluorosilicate solution and Sodium Fluorosilicate Solution.

[0068] Then, place a flask containing a mixed organic reagent of 100g ethanol and 100g acetone in an ultrasonic water tank, turn on ultrasonic dispersion, and add the above four inorganic salts to the flask at a speed of 5mL / h~10mL / h with a peristaltic pump to accelerate coagulation. The aqueous solution of the agent is used to prepare aluminum sulfate particles, sodium silicate particles, magnesium fluorosilicate particles and sodium fluorosilicate particles by anti-solvent method.

[0069] In the third step, 1.5g of diethanolamine and 0.5g of tetraethylammonium hydroxide were added to the flask under ultrasonic stirring, and 15.0g of butyl orthosilicate and 15.0g of tetrabutyl tit...

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Abstract

The invention belongs to the technical field of building material additives, and particularly discloses a slow-release coagulating composite material and a preparation method thereof. A method combining an anti-solvent method and a sol-gel method is designed, the problem that an inorganic salt coagulant is directly dissolved when meeting water is solved through chemical coating, the inorganic salt coagulant is coated with a porous nano packaging material, so that the purpose of slow release is achieved, and the slow-release coagulating composite material is obtained. When the coagulant composite material is applied to a cement-based material which is a cement liquid phase environment, the coagulant composite material can release an inorganic salt coagulant in a cement hydration acceleration period along with the improvement of the alkalinity of the cement liquid phase, and the inorganic salt coagulant can regulate and control the hydration process in an ion form, promote the formation of hydration products, shorten the coagulation time of the cement-based material and achieve the purpose of coagulation acceleration. The slow-release characteristic of the coagulation-accelerating composite material ensures that the released inorganic salt coagulation accelerator does not adsorb or wrap a workability adjusting product, so that the workability of a cement-based material is not influenced.

Description

technical field [0001] The invention belongs to the technical field of building material additives, and in particular relates to a slow-release type accelerator composite material, a preparation method thereof, and its application in cement-based materials. Background technique [0002] Hydraulic cementitious materials refer to materials that can cement granular materials (such as sand, stone) or block materials (such as bricks, tiles, etc.) into a whole in construction projects, such as cement. After the cement encounters water, the cement clinker minerals are hydrated into hydration products such as hydrated calcium silicate, calcium hydroxide, and hydrated calcium sulfoaluminate. The cement slurry gradually loses its fluidity and turns into a stone-like body with a certain strength. . Cement coagulation and solidification is the fundamental manifestation of its functional properties, which has important theoretical value and significant application benefits for improving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/08C04B22/14C04B22/12C04B28/04C04B103/22
CPCC04B20/1066C04B22/148C04B22/0093C04B12/04C04B22/126C04B28/04C04B2103/22C04B20/1007C04B14/06C04B14/28C04B14/02Y02W30/91
Inventor 赵爽曽鲁平王伟乔敏陈俊松单广程高南箫吴井志冉千平洪锦祥
Owner BOTE NEW MATERIALS TAIZHOU JIANGYAN CO LTD
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