An early-strength polycarboxylate water reducer and its preparation method and application

A technology of polycarboxylate and early-strength type, which is applied in the field of early-strength polycarboxylate water reducer and its preparation, can solve the problems of long concrete setting time, insignificant early-strength effect, and low water-reducing rate, and achieve early-strength Good strong effect, guaranteed strength, high compressive strength effect

Inactive Publication Date: 2018-05-25
SHANDONG JINGJIN NEW ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the traditional naphthalene-based early-strength water-reducer can no longer meet the requirements of concrete due to factors such as poor dispersion, low water-reducing rate, insignificant early-strength effect, and long concrete setting time.

Method used

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  • An early-strength polycarboxylate water reducer and its preparation method and application
  • An early-strength polycarboxylate water reducer and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0020] In the embodiment of the present invention, an early-strength polycarboxylate water reducer is composed of the following raw materials in parts by weight: 55 parts of polyacrylic acid, 33 parts of ethylenediaminetetraacetic acid, 5 parts of rectorite, and 15 parts of woody fragrance , 8 parts of polyethyleneimine.

[0021] Add deionized water 10 times its mass to polyacrylic acid, stir for 5 minutes, then add polyethyleneimine, then raise the temperature to 55°C, and treat at this temperature for 300 minutes to prepare a polyacrylic acid mixture for use. Grind and pass through an 80-mesh sieve, add 8 times the mass of absolute ethanol, heat to 70°C and stir for 20 minutes, then perform ultrasonic treatment for 30 minutes with an ultrasonic power of 800W to obtain ultrasonic treatment solution A. Crush the rectorite and pass through a 200-mesh sieve, then add ethylenediaminetetraacetic acid and mix with deionized water 4 times the mass of the rectorite, and then heat up ...

Embodiment 2

[0023] In the embodiment of the present invention, an early-strength polycarboxylate water reducer is composed of the following raw materials in parts by weight: 63 parts of polyacrylic acid, 42 parts of ethylenediaminetetraacetic acid, 12 parts of rectorite, and 23 parts of woody , 14 parts of polyethyleneimine.

[0024] Add 12 times the mass of deionized water to polyacrylic acid, stir for 10 minutes, then add polyethyleneimine, then raise the temperature to 60°C, and treat at this temperature for 40 minutes to prepare a polyacrylic acid mixture for use. Grind and pass through a 120-mesh sieve, add 10 times the mass of absolute ethanol, heat to 75°C and stir for 30 minutes, then perform ultrasonic treatment for 40 minutes with an ultrasonic power of 1000W to obtain ultrasonic treatment solution A. Crush the rectorite and pass through a 200-mesh sieve, then add ethylenediaminetetraacetic acid and mix with deionized water 5 times the mass of the rectorite, and then heat up to ...

Embodiment 3

[0026] In the embodiment of the present invention, an early-strength polycarboxylate water reducer is composed of the following raw materials in parts by weight: 57 parts of polyacrylic acid, 35 parts of ethylenediaminetetraacetic acid, 7 parts of rectorite, and 17 parts of woody fragrance , 10 parts of polyethyleneimine.

[0027] Add 11 times the mass of deionized water to polyacrylic acid, stir for 8 minutes, then add polyethyleneimine, then raise the temperature to 60°C, and treat at this temperature for 40 minutes to prepare a polyacrylic acid mixture for use. Grind and pass through a 120-mesh sieve, add 9 times the mass of absolute ethanol, heat to 75°C and stir for 30 minutes, then perform ultrasonic treatment for 40 minutes with an ultrasonic power of 1000W to obtain ultrasonic treatment solution A. Crush the rectorite and pass through a 200-mesh sieve, then add ethylenediaminetetraacetic acid and mix with deionized water 4.5 times the mass of the rectorite, and then he...

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Abstract

The invention discloses an early-strength polycarboxylate superplasticizer and a preparation method and application thereof. The early-strength polycarboxylate superplasticizer is prepared from, by weight, 55-63 parts of polyacrylic acid, 33-42 parts of ethylene diamine tetraacetic acid, 5-12 parts of rectorite, 15-23 pats of radix aucklandiae and 8-14 parts of polyethyleneimine. Deionized water is added to polyacrylic acid, then polyethyleneimine is added, and polyacrylic acid mixed liquor is prepared after heat treatment; radix aucklandiae is ground and screened, absolute ethyl alcohol is added for heat treatment, and then ultrasonic treatment is carried out to prepare ultrasonic treatment fluid A; rectorite is smashed and screened, then ethylene diamine tetraacetic acid and deionized water are added, and ultrasonic treatment is carried out to prepare ultrasonic treatment fluid B; the ultrasonic treatment fluid A and the ultrasonic treatment fluid B are mixed for heat treatment and filtration, supernatant liquid is taken, the polyacrylic acid mixed liquor is added, and heat treatment is conducted to obtain the early-strength polycarboxylate superplasticizer. The early-strength polycarboxylate superplasticizer has the advantages of being low in agent content, good in early strength effect, capable of preventing steel bars from being rusted, high in compressive strength and the like.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an early-strength polycarboxylate water reducer and its preparation method and application. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. Among them, the polycarboxylate high-performance water reducer (liquid) is the third generation of high-performance water reducer developed after the ordinary water reducer represented by wood calcium and the high-efficiency water reducer represented by naphthalene. At present, it i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B103/30
CPCC04B40/0039C04B2103/302C04B24/2641C04B24/123C04B14/10C04B16/02C04B24/32C04B28/04
Inventor 董明
Owner SHANDONG JINGJIN NEW ENERGY CO LTD
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