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A kind of concrete retarder and preparation method thereof

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

Active Publication Date: 2022-01-21
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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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: adding microcrystalline cellulose to 80% ethanol solution whose mass is 10 times, adding sodium hydroxide with 10% mass of microcrystalline cellulose at 45-50 o After stirring and reacting for 6 hours at C, cool down; then add microcrystalline cellulose 20% carboxymethyl cellulose, at 30-35 o Stirring at C for 2 hours to obtain a modified coarse material; drying the modified coarse material to obtain a modified microcrystalline cellulose.

[0026] The preparation of the modified glass fiber is as follows: mix the short glass fiber with 40% KHH50 aqueo...

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: adding microcrystalline cellulose to 80% ethanol solution whose mass is 10 times, adding sodium hydroxide with 10% mass of microcrystalline cellulose at 45-50 o After stirring and reacting for 6 hours at C, cool down; then add microcrystalline cellulose 20% carboxymethyl cellulose, at 30-35 o Stirring at C for 2 hours to obtain a modified coarse material; drying the modified coarse material to obtain a modified microcrystalline cellulose.

[0036] The preparation of the modified glass fiber is as follows: mix the short glass fiber with 40% KHH50 aqu...

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: adding microcrystalline cellulose to 80% ethanol solution whose mass is 10 times, adding sodium hydroxide with 10% mass of microcrystalline cellulose at 45-50 o After stirring and reacting for 6 hours at C, cool down; then add microcrystalline cellulose 20% carboxymethyl cellulose, at 30-35 o Stirring at C for 2 hours to obtain a modified coarse material; drying the modified coarse material to obtain a modified microcrystalline cellulose.

[0046] The preparation of the modified glass fiber is as follows: mix the short glass fiber with 40% KHH50 aqueou...

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Abstract

The invention belongs to the technical field of building materials, in particular to a concrete retarder and a preparation method thereof. The concrete retarder is made of 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 poly Vinyl chloride resin, 2-4 parts of anhydrous sodium sulfate, 3-5 parts of quartz sand, 8-12 parts of sodium tripolyphosphate, 1-3 parts of carboxymethyl cellulose. The concrete retarder provided by the invention has good heat absorption and heat dissipation properties, can absorb the heat of hydration generated by concrete; and make the concrete form a good heat exchange effect with the external environment, so that the heat of hydration generated in the concrete can be dissipated ; And inhibit the hydration of cement in concrete, has a strong retarding effect; at the same time has good strength, less impact on the strength and anti-scouring performance of concrete.

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, an appropriate amount of retarder 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 present, the s...

Claims

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Application Information

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Patent Type & Authority Patents(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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