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A kind of preparation method of high thixotropic early-strength polycarboxylate water reducer

A thixotropic and early-strength technology, applied in the field of building materials, can solve problems such as insufficient research on thixotropic properties, and achieve the effects of simple operation, accelerated construction progress, and increased turnover rate.

Active Publication Date: 2018-09-28
KZJ NEW MATERIALS GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above technical solutions only focus on improving the early-strength performance of polycarboxylate superplasticizers, but have not conducted or insufficient research on their thixotropic properties

Method used

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  • A kind of preparation method of high thixotropic early-strength polycarboxylate water reducer
  • A kind of preparation method of high thixotropic early-strength polycarboxylate water reducer
  • A kind of preparation method of high thixotropic early-strength polycarboxylate water reducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] (1) Add 200 parts by weight of isobutylene alcohol polyoxyethylene ether macromonomer (molecular weight Mw is 3000), 1.5 parts by weight of methacryloyloxyethyl trimethyl in a four-necked flask equipped with a thermometer, a stirrer and a peristaltic pump ammonium chloride, 10 parts by weight of small molecule polyether SPE-1, 3 parts by weight of unsaturated fatty acid glyceride FG-1, 1.5 parts by weight of ammonium persulfate and 156 parts by weight of water, stirred and dissolved at 20°C;

[0035] (2) The first solution that 0.15 parts by weight 2-hydroxyl-2-sulfinic acid group acetic acid and the water of 25 parts by weight are made into, the second solution that the water of 0.8 parts by weight mercaptoacetic acid and 25 parts by weight are made into and 16 The third solution that the acrylic acid of weight part and 4 weight parts hydroxyethyl acrylate and the water of 15 weight parts are made into;

[0036] (3) Add the above-mentioned first solution, second soluti...

Embodiment 2

[0039] (1) Add 200 parts by weight of isobutylene alcohol polyoxyethylene ether macromonomer (molecular weight Mw is 4000), 2 parts by weight of acryloyloxyethyl trimethyl chloride in a four-necked flask equipped with a thermometer, a stirrer and a peristaltic pump Ammonium chloride, 12 parts by weight of small molecule polyether SPE-2, 5 parts by weight of unsaturated fatty acid glyceride FG-2, 1.6 parts by weight of sodium persulfate and 158 parts by weight of water were stirred and dissolved at 25°C;

[0040] (2) 0.25 parts by weight of 2-hydroxyl-2-sulfinic acid disodium salt and 25 parts by weight of water are made into the first solution, 0.9 parts by weight of 3-mercaptopropionic acid and 25 parts by weight of water are made into The methacrylic acid of the second solution and 13 parts by weight and the third solution that the water of 5 parts by weight hydroxyethyl methacrylate and 15 parts by weight is made into;

[0041] (3) Add the above-mentioned first solution, se...

Embodiment 3

[0044](1) Add 200 parts by weight of isobutylene alcohol polyoxyethylene ether macromer (molecular weight Mw is 5000), 3 parts by weight of diallyl dimethyl chloride in a four-necked flask equipped with a thermometer, a stirrer and a peristaltic pump Ammonium, 15 parts by weight of small molecule polyether SPE-3, 8 parts by weight of unsaturated fatty acid glyceride FG-3, 1.9 parts by weight of potassium persulfate and 158 parts by weight of water were stirred and dissolved at 30°C;

[0045] (2) The first solution made of 0.18 parts by weight of 2-hydroxy-2-sulfonic acid and 25 parts by weight of water, the second solution made of water of 0.8 parts by weight of thioglycerol and 25 parts by weight of water, and 15 parts by weight The methacrylic acid of part and the 3rd solution that the water of 6 parts by weight hydroxypropyl methacrylate and 15 parts by weight is made into;

[0046] (3) Add the above-mentioned first solution, second solution and third solution dropwise to t...

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Abstract

The invention discloses a preparation method of a high-thixotropy early-strength type polycarboxylate superplasticizer. The preparation method comprises the following steps of (1) adding isobutene polyoxyethylene ether and / or isopentene polyoxyethylene ether, micromolecular polyether, unsaturated fatty acid glyceride, a quaternary ammonium salt monomer and an oxidant into water, and stirring the mixture under 15 to 30 DEG C until the mixture is dissolved; (2) preparing a first solution by a reducing agent and water, preparing a second solution by a chain transfer agent and the water, and preparing a third solution by unsaturated monocarboxylic acid, an unsaturated carboxylic ester monomer and the water; (3) dropping the first solution, the second solution and the third solution in materials in step (1) within 3 to 4 hours at the same time, and carrying out a heat-preservation reaction for 1 to 1.5 hours under 35 to 40 DEG C after dropping is completed; (4) adding an alkaline modifier to neutralize the pH (Potential Of Hydrogen) to be 6 to 7 after the reaction of the materials in step (3) is completed, thus obtaining the high-thixotropy early-strength type polycarboxylate superplasticizer. The high-thixotropy early-strength type polycarboxylate superplasticizer prepared by the invention has an excellent thixotropic property.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a preparation method of a high-thixotropy early-strength polycarboxylate water reducer. Background technique [0002] With the acceleration of the construction of concrete engineering projects, the consumption of precast concrete products is also showing a growing trend. Precast concrete products are formed by pouring concrete into molds and then transported to the construction site for assembly. In order to improve the production efficiency of the factory, it is necessary for the concrete members to be released from the mold in a short time, which requires the concrete to have a high early strength. In addition, prefabricated concrete products, such as subway shield segment concrete, are characterized by high cementitious materials, low water-binder ratio, and low slump, which are not easy to lose, and easy to pour and vibrate. When ordinary polycarboxyl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F220/34C08F220/06C08F220/28C08F4/40C04B24/26C04B103/30
Inventor 赖广兴方云辉林艳梅刘木林赖华珍
Owner KZJ NEW MATERIALS GROUP CO LTD
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