High-impermeability concrete pumping agent and preparation method thereof

A concrete pump and high-resistance technology, applied in the field of building materials manufacturing, can solve the problems of inability to reduce concrete slump loss, impermeability, poor durability, etc., and achieve improved impermeability, enhanced frictional resistance, and good application prospects. Effect

Inactive Publication Date: 2020-08-28
深圳市新佰人建筑材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a high-impermeability concrete pumping agent and its preparation method in view of the poor impermeability and durability of commonly used concrete pumping agents and the inability to reduce the loss of concrete slump

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0031] The preparation method of composite pumping effect base material comprises the steps:

[0032] (1) Mix phosphogypsum and fly ash in a mortar at a mass ratio of 7~12:3, and grind at 300~400r / min for 1~3h to obtain a fine grinding material, at 20~30°C, by mass parts , Take 12~20 parts of fine grinding material, 1~3 parts of p-toluenesulfonic acid, 2~5 parts of tetraethyl orthosilicate, 3~7 parts of hydrophobic material, 30~45 parts of ethanol solution with a volume fraction of 70% and mix and stir 30~50min, heat up to 48~55°C, add silane coupling agent KH-550 with 2~5% of the mass of the fine grinding material to mix, keep stirring for 1~2h, filter, collect the filter residue and dry it in an oven at 90~100°C for 3~5h , get dry material;

[0033] (2) According to the number of parts by mass, take 25~40 parts of dry matter, 1~3 parts of sodium bentonite, 0.2~0.5 parts of magnesium lithium silicate, 2~5 parts of sodium polyacrylate, 45~60 parts of water in 35~ Mix and sti...

Embodiment 1

[0040] Rheological agent: Mix propylene glycol alginate and guar gum at a mass ratio of 3:1 to obtain a rheological agent.

[0041] Hydrophobic material: Mix trimethylchlorosilane and polyurea at a mass ratio of 2:1 to obtain a hydrophobic material.

[0042] Reagent: Mix urea and calcium bicarbonate with a mass fraction of 12% at a mass ratio of 1:5 to obtain a reagent.

[0043] Additive: Mix polyvinylpyrrolidone and cetyl hydroxypropyl sulfobetaine at a mass ratio of 4:1 to obtain the additive.

[0044] The preparation method of composite pumping effect base material comprises the steps:

[0045] (1) Mix phosphogypsum and fly ash in a mortar with a mass ratio of 7:3, and grind at 300r / min for 1 hour to obtain a fine grinding material. At 20°C, take 12 parts of fine grinding material, 1 part of p-toluenesulfonic acid, 2 parts of tetraethyl orthosilicate, 3 parts of hydrophobic material, and 30 parts of ethanol solution with a volume fraction of 70% were mixed and stirred for...

Embodiment 2

[0053] Rheological agent: Mix propylene glycol alginate and guar gum at a mass ratio of 5:1 to obtain a rheological agent.

[0054] Hydrophobic material: Mix trimethylchlorosilane and polyurea at a mass ratio of 3:1 to obtain a hydrophobic material.

[0055] Reagent: Mix urea and calcium bicarbonate with a mass fraction of 12% in a mass ratio of 1:7 to obtain a reagent.

[0056] Additive: Mix polyvinylpyrrolidone and cetyl hydroxypropyl sulfobetaine at a mass ratio of 6:2 to obtain the additive.

[0057] The preparation method of composite pumping effect base material comprises the steps:

[0058] (1) Mix phosphogypsum and fly ash in a mortar at a mass ratio of 10:3, and grind at 350r / min for 2 hours to obtain a fine grinding material. At 25°C, take 16 parts of fine grinding material, 2 parts of p-toluenesulfonic acid, 3 parts of tetraethyl orthosilicate, 5 parts of hydrophobic material, and 37 parts of ethanol solution with a volume fraction of 70% were mixed and stirred fo...

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PUM

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Abstract

The invention discloses a high-impermeability concrete pumping agent and a preparation method thereof, and belongs to the field of building material manufacturing. Ardealite and fly ash are subjectedto grinding occlusion, so the frictional resistance is enhanced in the grinding process; and added sodium bentonite and sodium polyacrylate can also play a thickening role, so the compactness of a space structure is improved, the loss of the collapse degree of concrete is reduced, and the durability of the concrete after application is improved. Organic substances and inorganic substances act on each other, and under the action of water, the water enters gaps through diffusion or water seepage channels to form compact insoluble crystals, so the impermeability is improved, and the structural compactness of the concrete is improved; and Si-OH structural units react with calcium and magnesium ions contained in the concrete to form a complex, so the concrete is inerted to a certain degree, andthe durability is improved. The concrete pumping agent provided by the invention solves the problems of poor impermeability and durability and incapability of reducing concrete slump loss of a current common concrete pumping agent.

Description

technical field [0001] The invention belongs to the field of building material manufacturing, and in particular relates to a high-impermeability concrete pumping agent and a preparation method thereof. Background technique [0002] Concrete is an important building material in the construction industry. Most high-performance concrete construction uses pumping technology. The pumping agent is a composite admixture formulated according to the actual needs of pumping concrete construction technology, climate conditions and cement varieties. , mainly composed of water reducer components and other functional admixtures. It can greatly improve the fluidity of the mixture, and can maintain the fluidity of the mixture for a long time, so that the concrete can still maintain good workability after being conveyed under pressure, without segregation and bleeding. [0003] At present, the commonly used concrete pumping agents require both early strength and slump retention, and the slu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B20/02C04B24/38C04B18/08C04B18/04C04B14/20C04B103/60C04B103/61C04B103/65
CPCC04B20/023C04B40/0039C04B2103/60C04B2103/603C04B2103/61C04B2103/65C04B22/0013C04B2103/302C04B24/02C04B24/18C04B24/10C04B18/08C04B18/0445C04B14/104C04B24/2641C04B14/045C04B12/04C04B18/146C04B22/106C04B24/126C04B14/202C04B24/38Y02W30/91
Inventor 陈傲
Owner 深圳市新佰人建筑材料科技有限公司
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