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Composite admixture applied to hydraulic concrete and preparation method thereof

A technology of hydraulic concrete and composite admixture, which is applied in cement production, sustainable waste treatment, solid waste management, etc., can solve the problems of hydration heat control and rust prevention at the same time, and achieve the reduction of temperature shrinkage cracks, Reduce the temperature difference and reduce the effect of early heat of hydration

Active Publication Date: 2021-09-07
TIANJIN JINSHENGYUAN SPECIAL BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide a composite admixture applied to hydraulic concrete and its preparation method, which is used to solve the problem that the existing technology of large-volume concrete in hydraulic engineering cannot simultaneously solve the problems of heat of hydration control and rust prevention

Method used

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  • Composite admixture applied to hydraulic concrete and preparation method thereof
  • Composite admixture applied to hydraulic concrete and preparation method thereof
  • Composite admixture applied to hydraulic concrete and preparation method thereof

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preparation example Construction

[0022] In order to solve the above technical problems, the present invention provides a second solution: a method for preparing a composite admixture applied to hydraulic concrete is provided, which is used to prepare the composite admixture applied to hydraulic concrete in the aforementioned first solution Admixtures, the specific steps are as follows:

[0023] After taking mineral powder, manganese slag powder, phosphogypsum powder and silica fume according to the proportion, stir and premix for 1-2 minutes to obtain the first mixture; ~3 minutes to obtain the second mixture; add the second mixture into the first mixture according to the ratio, and stir evenly to obtain a composite admixture for hydraulic concrete.

[0024] In addition, after obtaining the composite admixture applied to hydraulic concrete, the composite admixture is applied to hydraulic concrete instead of the cementitious material in the cement base material, so that the hydraulic concrete has both hydratio...

Embodiment 1

[0031]In this embodiment, the following raw materials are weighed in terms of mass percentages: 45% mineral powder, 35% manganese slag powder, 3.9% phosphogypsum powder, 15% silica fume, 0.95% sodium citrate, diethanol monoisopropanolamine 0.05%, sodium monofluorophosphate 0.05%, sodium gluconate 0.05%; among them, sodium citrate is the heat of hydration inhibitor component, and the mixture of diethanol monoisopropanolamine, sodium monofluorophosphate and sodium gluconate is the rust inhibitor components.

[0032] Stir and premix mineral powder, manganese slag powder, phosphogypsum powder, and silica fume for 1 minute to obtain the first mixture; stir and premix the pre-prepared hydration heat suppression component and antirust component for 2 minutes to obtain the second Mixed material: adding the second mixed material into the first mixed material, and stirring evenly to obtain a composite admixture applied to hydraulic concrete.

Embodiment 2

[0034] In this embodiment, the following raw materials are weighed in terms of mass percentages: 45% mineral powder, 35% manganese slag powder, 3% phosphogypsum powder, 13.95% silica fume, 1.0% sodium citrate, 1.90% sodium fluorosilicate, 0.05% diethanol monoisopropanolamine, 0.05% sodium monofluorophosphate, 0.05% sodium gluconate; among them, sodium citrate and sodium fluorosilicate are heat of hydration inhibiting components, diethanol monoisopropanolamine, mono The mixture of sodium fluorophosphate and sodium gluconate is an antirust component.

[0035] The mineral powder, manganese slag powder, phosphogypsum powder, and silica fume were stirred and premixed for 2 minutes to obtain the first mixture; the pre-prepared hydration heat suppression component and antirust component were stirred and premixed for 2 minutes to obtain the second mixture. Mixed material: adding the second mixed material into the first mixed material, and stirring evenly to obtain a composite admixtur...

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Abstract

The invention discloses a composite admixture applied to hydraulic concrete and a preparation method thereof, wherein the composite admixture applied to hydraulic concrete is prepared from the following raw materials in percentage by mass: 40-50% of mineral powder, 30-40% of manganese slag powder, 10-15% of silica fume, 5-10% of phosphogypsum powder, 1-3% of a hydration heat inhibiting component, and 0.5-2% of a rust inhibition component. The hydration heat inhibiting component is any one or a mixture of more of sodium citrate, sodium fluosilicate and boric acid. The composite admixture prepared from specific raw materials according to a specific ratio is applied to hydraulic concrete to replace part of a cementing material in a cement-based material, so that the early hydration heat of the concrete can be reduced, the temperature difference between the inner surface and the outer surface of the concrete can be reduced, temperature shrinkage cracks can be reduced, the compactness of the concrete can be improved, the corrosion channel of harmful ions such as chloride ions is blocked, and a protective film is formed on the surface of a reinforcing steel bar, so that the reinforcing steel bar is effectively prevented from being corroded, and the hydraulic concrete can simultaneously have hydration heat inhibition and rust inhibition effects.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a composite admixture applied to hydraulic concrete and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of my country's economy and the development of marine resources, more and more ports, sea-crossing bridges and coastal buildings have sprung up. At the same time, there are higher requirements for the foundation of buildings. , Most of the foundations of this type of building are large-volume reinforced concrete structures. The biggest problem facing large-volume concrete is that the concrete will produce temperature shrinkage cracks due to the high hydration heat of the cementitious material, which will affect the durability of the structure. Compared with ordinary reinforced concrete structures, large-volume concrete used in water conservancy projects faces the problem of temperature shrinkage cracks on the one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/21C04B7/26C04B7/24
CPCC04B7/21C04B7/26C04B7/24Y02P40/10Y02W30/91
Inventor 廖明儒
Owner TIANJIN JINSHENGYUAN SPECIAL BUILDING MATERIALS
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