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High-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor as well as preparation method and application thereof

A technology of anti-mud type and polycarboxylate, which is applied in the field of concrete admixture, can solve the problems of increasing the cost of machinery, labor and materials, increasing the amount of polycarboxylate water reducer, increasing the amount of polycarboxylate water reducer, etc. Achieve the effects of reducing adverse effects, long slump retention time, and reducing production costs

Pending Publication Date: 2020-05-08
SHAANXI YOUBANG NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two main solutions to the above problems at home and abroad: one is to clean the sand and gravel, but this solution is not only very troublesome to operate, but also greatly increases the cost of machinery, labor and materials; the other is to increase the cost of polycarboxylate The amount of acid superplasticizer allows the clay mineral to absorb part of the polycarboxylate superplasticizer, leaving enough polycarboxylate superplasticizer for the cement particles, but the increase in the amount of polycarboxylate superplasticizer leads to an increase in cost

Method used

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  • High-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor as well as preparation method and application thereof
  • High-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0031] The preparation method of high slump and anti-mud type polycarboxylate superplasticizer mother liquor specifically comprises the following steps:

[0032] After adding deionized water to the reaction vessel, and controlling the temperature of the reaction vessel within the range of 15-35°C, put in the ether macromonomer and stir until it is completely dissolved;

[0033] Adding unsaturated carboxylic acid and / or anti-mud monomer into the reaction vessel, mixing evenly, and then adding oxidizing agent;

[0034] Dissolve unsaturated carboxylic acid, anti-mud monomer and amide monomer in deionized water to prepare solution A for use; dissolve chain transfer agent and reducing agent in deionized water to obtain solution B. stand-by;

[0035] The solution A and the solution B are added dropwise into the reaction container respectively, the solution A is added dropwise for 1-2.5 hours, and the solution B is added for 1-3 hours;

[0036] After the reaction container is kept ...

Embodiment 1

[0040] Add 330.0g of deionized water to the reactor, and control the temperature of the reactor within the range of 15-35°C by insulating the outer layer of the reactor; then, put 210.0g of methallyl polyoxygen into the reactor Vinyl ether (molecular weight: 2400) and 140.0 g of isopentenol polyoxyethylene ether (molecular weight: 2400), stirring continuously until there is no obvious block or flake material.

[0041] Add 5.0 g of acrylic acid and 8.0 g of dimethyl diallyl ammonium chloride into the reaction kettle, and stir for 5 min; then add 2.5 g of 30% industrial grade hydrogen peroxide, and continue stirring for 10 min.

[0042] Dissolve 17.0 g of acrylic acid, 4.0 g of acrylamide, 3.0 g of N,N-diethyl-2-acrylamide and 2.9 g of 2-acrylamide-2-methylpropanesulfonic acid in 40.0 g of deionized water , that is, the prepared solution A is ready for use.

[0043] Dissolve 1.0 g of mercaptoacetic acid, 1.0 g of mercaptopropionic acid and 0.6 g of ascorbic acid in 100.0 g of d...

Embodiment 2

[0047] Add 330.0g of deionized water to the reactor, and control the temperature of the reactor within the range of 15-35°C through the operation of heating in a water bath; Place in the reaction kettle and keep stirring until the dissolution is complete.

[0048] 9.0g of acrylic acid and 9.0g of DTPMP·Na 7 Add to the above reaction kettle, stir for 10min; add 2.5g of ammonium persulfate, and continue stirring for 10min.

[0049]13.4 g of methacrylic acid, 7.0 g of acrylamide and 1.5 g of 2-acrylamide-2-methylpropanesulfonic acid were dissolved in 40.0 g of deionized water to prepare solution A for use.

[0050] Dissolve 1.0 g of mercaptoacetic acid, 1.0 g of mercaptopropionic acid and 0.6 g of sodium sulfite in 120 g of deionized water to prepare solution B for use.

[0051] The solution A and the solution B were added dropwise into the above-mentioned reaction kettle respectively, the duration of the solution A was 2.5 hours, and the duration of the solution B was 3 hours....

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Abstract

The invention provides a high-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor as well as a preparation method and application thereof, and the high-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor is prepared from the following materials in percentage by mass: 25-36% of ether macromonomer, 0.15%-0.3% of an oxidizing agent, 2.2-3.0% of unsaturated carboxylic acid, 1-5% of an anti-mud monomer, 0.3-3% of an amide monomer, 0.01 to 2 percent of a chain transfer agent, 0.03%-0.06% of a reducing agent, 1.0%-1.1% of a pH regulator, and remainingamount of deionized water. The high-slump-retaining mud-resistant polycarboxylate superplasticizer mother liquor with low mixing amount, long slump-retaining time and strong mud resistance is prepared from the raw materials through a synthesis process.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to a high-slump and mud-resistance polycarboxylate superplasticizer mother liquor and its preparation method and application. Background technique [0002] In recent years, with the sharp increase in the amount of basic construction projects, the consumption of sand and gravel has also increased sharply, but high-quality sand and gravel resources are in short supply. Most of the sand contains high mud content, which will not only reduce the quality of concrete The strength and durability of concrete will also increase the drying shrinkage of concrete. Among them, it greatly affects the workability of concrete mixed with water reducing agents, especially for water reducing agents such as polycarboxylic acid. [0003] At present, there are two main solutions to the above problems at home and abroad: one is to clean the sand and gravel, but this solution is not only very t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/56C08F220/54C08F220/58C08F226/02C08F230/02C04B24/16C04B24/26C04B103/30
CPCC08F283/065C04B24/165C04B24/246C04B2103/302C08F220/06C08F220/56C08F220/54C08F226/02C08F230/02
Inventor 杨仁和
Owner SHAANXI YOUBANG NEW MATERIAL TECH
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