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Concrete retarder and preparation method thereof

A concrete and retarder technology, which is applied in the field of building materials, can solve the problems of small reduction, lower reaction heat, and affect the anti-scouring performance of concrete, and achieve the effects of inhibiting hydration, improving compatibility, and good strength

Active Publication Date: 2020-09-15
贵州凯襄新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patented technical solution is to reduce the heat of reaction through the hydration reaction between slag and calcium hydroxide in concrete. Although the heat of reaction is reduced, the reduction is small, and it will affect the anti-scouring performance of concrete.

Method used

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  • Concrete retarder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A concrete retarder, made of the following raw materials: 3 parts of modified microcrystalline cellulose, 3 parts of acrylic acid, 6 parts of modified glass fiber, 10 parts of borax, 6 parts of polyvinyl chloride resin, 4 parts of anhydrous sodium sulfate , 3 parts of quartz sand, 12 parts of sodium tripolyphosphate, 1 part of carboxymethyl cellulose.

[0025] The preparation of the modified microcrystalline cellulose is as follows: adding the microcrystalline cellulose to an 80% ethanol solution whose mass is 10 times that of the microcrystalline cellulose, adding sodium hydroxide with 10% mass of the microcrystalline cellulose and stirring at 45-50°C for 6 hours After cooling, add 20% carboxymethyl cellulose of microcrystalline cellulose, and stir at 30-35°C for 2 hours to obtain a modified coarse material; dry the modified coarse material to obtain a modified microcrystalline Crystalline cellulose.

[0026] The preparation of the modified glass fiber is as follows: ...

Embodiment 2

[0034] A concrete retarder, made from the following raw materials: 5 parts of modified microcrystalline cellulose, 2 parts of acrylic acid, 6.5 parts of modified glass fiber, 6 parts of borax, 8 parts of polyvinyl chloride resin, 3 parts of anhydrous sodium sulfate , 4 parts of quartz sand, 10 parts of sodium tripolyphosphate, 1 part of carboxymethyl cellulose.

[0035] The preparation of the modified microcrystalline cellulose is as follows: adding the microcrystalline cellulose to an 80% ethanol solution whose mass is 10 times that of the microcrystalline cellulose, adding sodium hydroxide with 10% mass of the microcrystalline cellulose and stirring at 45-50°C for 6 hours After cooling, add 20% carboxymethyl cellulose of microcrystalline cellulose, and stir at 30-35°C for 2 hours to obtain a modified coarse material; dry the modified coarse material to obtain a modified microcrystalline Crystalline cellulose.

[0036] The preparation of the modified glass fiber is as follow...

Embodiment 3

[0044] A concrete retarder, made of the following raw materials: 6 parts of modified microcrystalline cellulose, 1 part of acrylic acid, 8 parts of modified glass fiber, 5 parts of borax, 10 parts of polyvinyl chloride resin, 2 parts of anhydrous sodium sulfate , 5 parts of quartz sand, 8 parts of sodium tripolyphosphate, 3 parts of carboxymethyl cellulose.

[0045] The preparation of the modified microcrystalline cellulose is as follows: adding the microcrystalline cellulose to an 80% ethanol solution whose mass is 10 times that of the microcrystalline cellulose, adding sodium hydroxide with 10% mass of the microcrystalline cellulose and stirring at 45-50°C for 6 hours After cooling, add 20% carboxymethyl cellulose of microcrystalline cellulose, and stir at 30-35°C for 2 hours to obtain a modified coarse material; dry the modified coarse material to obtain a modified microcrystalline Crystalline cellulose.

[0046] The preparation of the modified glass fiber is as follows: m...

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Abstract

The invention belongs to the technical field of building materials, and particularly relates to a concrete retarder and a preparation method thereof. The concrete retarder is prepared from the following raw materials: 3-6 parts of modified microcrystalline cellulose, 1-3 parts of acrylic acid, 8-12 parts of modified glass fiber, 5-10 parts of borax, 6-10 parts of polyvinyl chloride resin, 2-4 parts of anhydrous sodium sulfate, 3-5 parts of quartz sand, 8-12 parts of sodium tripolyphosphate and 1-3 parts of carboxymethyl cellulose. The concrete retarder has good heat absorption property and heat dissipation property, and can absorb hydration heat produced by concrete; a good heat exchange effect is formed between the concrete and the external environment so that hydration heat energy generated in the concrete is dissipated; hydration of cement in the concrete is inhibited, and a strong retarding effect is achieved; meanwhile, the concrete retarder has good strength, and the influence onthe strength and the anti-scouring performance of the concrete is low.

Description

technical field [0001] The invention belongs to the technical field of building materials, in particular to a concrete retarder and a preparation method thereof. Background technique [0002] Retarder is a common admixture used to prolong the setting time of concrete. During the summer construction process, adding an appropriate amount of coagulant can make the newly mixed concrete maintain good plasticity for a long time, facilitate construction, and improve work efficiency. Especially in the process of mass concrete construction, in order to prevent the concrete from producing temperature cracks due to excessive concentration of hydration heat, adding retarder has become one of the important means; and for high temperature seasons, appropriate amount of retarder It can prevent the concrete from collapsing too quickly and depleting its workability. Therefore, retarders have very realistic economic value and technical value in modern concrete technology. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/22
CPCC04B40/0039C04B2103/22C04B14/42C04B14/06C04B22/0013C04B22/147C04B24/04C04B24/2682C04B24/383C04B22/16
Inventor 张鑫柳掌珀任鹏飞贾虎琛
Owner 贵州凯襄新材料有限公司
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