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A green and environment-friendly water-reducing agent and recycled concrete using the water-reducing agent

A green, environmentally friendly, water-reducing agent technology, applied in the field of concrete and its admixtures, can solve the problems of weak water-reducing effect of ultra-fine-grained cement, and achieve the effects of improving segregation and bleeding, improving dispersibility, and good synergy.

Active Publication Date: 2022-04-22
南通市展成商品混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The first purpose of this application is to provide a green and environment-friendly water reducing agent, which is used to improve the defect that the existing water reducing agent has a weak water reducing effect on ultra-fine particle cement

Method used

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  • A green and environment-friendly water-reducing agent and recycled concrete using the water-reducing agent
  • A green and environment-friendly water-reducing agent and recycled concrete using the water-reducing agent
  • A green and environment-friendly water-reducing agent and recycled concrete using the water-reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The water reducer is made of the following components by weight: 65 parts of sulfamate-based water reducer, 20 parts of hydroxypropyl methylcellulose, 10 parts of triisopropanolamine, and 10 parts of 2-hydroxyethylamine And 5 parts of anhydrous sodium metasilicate;

[0039] The preparation method of sulfamate-based water reducer is:

[0040] 1) Preparation of raw materials: Prepare sodium p-aminobenzenesulfonate, phenol, urea, sodium pyrophosphate and formaldehyde raw materials, wherein the molar ratio of sodium p-aminobenzenesulfonate, phenol and formaldehyde is 1:1.5:2.75, (p-aminobenzenesulfonate The molar ratio of sodium sulfonate+phenol) to urea is 1:0.1, and the molar ratio of urea to sodium pyrophosphate is 1:0.86;

[0041] 2) heating to dissolve sodium p-aminobenzenesulfonate, phenol, urea and sodium pyrophosphate in deionized water, and stir evenly to obtain a solution;

[0042] 3) Slowly add formaldehyde dropwise to the solution, condense at a constant tempe...

Embodiment 2

[0052] The water reducer is made of the following components by weight: 55 parts of sulfamate-based water reducer, 15 parts of hydroxypropyl methylcellulose, 5 parts of triisopropanolamine, and 5 parts of 2-hydroxyethylamine And 2 parts of anhydrous sodium metasilicate;

[0053] The preparation method of sulfamate-based water reducer is:

[0054] 1) Preparation of raw materials: prepare sodium p-aminobenzenesulfonate, phenol, urea, sodium pyrophosphate and formaldehyde raw materials, wherein the molar ratio of sodium p-aminobenzenesulfonate, phenol and formaldehyde is 1:1.25:2.75, (p-aminobenzene The molar ratio of sodium sulfonate+phenol) to urea is 1:0.05, and the molar ratio of urea to sodium pyrophosphate is 1:0.75;

[0055] 2) heating to dissolve sodium p-aminobenzenesulfonate, phenol, urea and sodium pyrophosphate in deionized water, and stir evenly to obtain a solution;

[0056] 3) Slowly add formaldehyde dropwise to the solution, condense at constant temperature for ...

Embodiment 3

[0066] The water reducer is made of the following components by weight: 75 parts of sulfamate-based water reducer, 25 parts of hydroxypropyl methylcellulose, 15 parts of triisopropanolamine, and 15 parts of 2-hydroxyethylamine And 8 parts of anhydrous sodium metasilicate;

[0067] The preparation method of sulfamate-based water reducer is:

[0068] 1) Raw material preparation: prepare sodium p-aminobenzenesulfonate, phenol, urea, sodium pyrophosphate and formaldehyde raw materials, wherein the molar ratio of sodium p-aminobenzenesulfonate, phenol and formaldehyde is 1:1.75:2.75, (p-aminobenzene The molar ratio of sodium sulfonate+phenol) to urea is 1:0.15, and the molar ratio of urea to sodium pyrophosphate is 1:1;

[0069] 2) heating to dissolve sodium p-aminobenzenesulfonate, phenol, urea and sodium pyrophosphate in deionized water, and stir evenly to obtain a solution;

[0070] 3) Slowly add formaldehyde dropwise to the solution, condense at constant temperature for 2 hou...

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Abstract

The application relates to a green and environment-friendly water reducing agent and recycled concrete using the water reducing agent, and relates to the technical field of concrete and its admixtures. The water reducing agent is made of the following components by weight: sulfamate series 55-75 parts of water reducing agent, 15-25 parts of hydroxypropyl methylcellulose, 5-15 parts of triisopropanolamine, 5-15 parts of 2-hydroxyethylamine and 2-8 parts of anhydrous sodium metasilicate ; Recycled concrete is made of the following components by weight: 55-65 parts of recycled coarse aggregate, 15-25 parts of natural coarse aggregate, 10-20 parts of Portland cement, 20-40 parts of fine sand, pulverized coal 18-32 parts of ash, 20-30 parts of activated water, 5-10 parts of soybean fiber / carbon fiber / epoxy resin composite fiber and 3-5 parts of water reducing agent. The application has the effect of improving the defect that the existing water-reducing agent has a weak water-reducing effect on ultra-fine particle cement.

Description

technical field [0001] The application relates to the technical field of concrete and its admixtures, in particular to a green and environment-friendly water reducer and recycled concrete using the water reducer. Background technique [0002] Water reducer is a concrete admixture used to reduce the amount of mixing water while maintaining the slump of concrete basically unchanged. After the water reducer is added to the concrete mixture, it has a certain dispersing effect on the cement particles of the cementitious material, thereby reducing the agglomeration of the cement particles and improving the fluidity of the concrete mixture, thereby reducing the concrete mixture. Unit water consumption. [0003] The existing cement particles are relatively fine. When they encounter mixing water, the cement particles will attract each other under the action of electrostatic attraction, etc., and then form a three-dimensional three-dimensional flocculation structure. About 10%-30% o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38C04B28/04C08G14/12C08G14/08C04B103/30
CPCC08G14/12C08G14/08C04B40/0039C04B28/04C04B2103/302C04B2111/00017C04B24/16C04B24/383C04B24/122C04B22/08C04B22/002C04B24/06C04B14/02C04B18/16C04B14/06C04B18/08C04B18/248C04B14/386C04B16/0675
Inventor 征波
Owner 南通市展成商品混凝土有限公司
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