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Polycarboxylate water reducer for small-slump concrete, and preparation method thereof

A technology for slump and concrete, used in the preparation of polycarboxylate water reducer, concrete admixture, polycarboxylate water reducer, polycarboxylate water reducer for small slump concrete, small slump concrete In the field of preparation of polycarboxylate superplasticizer, it can solve problems such as no guidance plan, and achieve the effects of no environmental pollution, good material adaptability, and weak dosage sensitivity

Active Publication Date: 2017-12-15
SICHUAN CHANGAN YUCAI BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above technologies have not given specific guidance on how to make the water reducer applicable to construction projects with concrete initial slump less than 180mm, and have good workability and flow retention

Method used

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  • Polycarboxylate water reducer for small-slump concrete, and preparation method thereof

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Comparison scheme
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Embodiment 1

[0016] Embodiment 1: The polycarboxylate superplasticizer for small slump concrete of the present invention is made of the following raw materials in parts by mass: 120 parts of methoxy polyoxyethylene ether, 0.5 part of p-toluenesulfonic acid as catalyst , 0.15 parts of hydroquinone as a polymerization inhibitor, 10 parts of cyclohexane as a water-carrying agent, 17 parts of acrylic acid, 18 parts of maleic anhydride, and 15 parts of functional monomers in unsaturated acids and acid anhydrides. The initiator is 1.5 parts of ammonium persulfate, the chain transfer agent is 1.5 parts of sodium methacrylate sulfonate, and 300 parts of deionized water; wherein, the weight average molecular weight of the above-mentioned methoxy polyoxyethylene ether is 600, and the above-mentioned functional unit The body is a combination of 12 parts of 2-acrylamido-2-methylpropanesulfonic acid and 3 parts of methyl acrylate.

[0017] The preparation method of the above-mentioned polycarboxylate w...

Embodiment 2

[0018]Embodiment 2: the polycarboxylate water-reducer for small slump concrete of the present invention is made of the following raw materials in parts by mass: 150 parts of methoxy polyoxyethylene ethers, 0.5 parts of concentrated sulfuric acid as a catalyst, and The polymerization agent is 0.2 parts of thiaphenazine, the water-carrying agent is 8 parts of cyclohexane, the two components in the unsaturated acid and acid anhydride are 17 parts of methacrylic acid, 12 parts of acrylic acid, 14 parts of functional monomers, and the initiator is hydrogen peroxide 1.2 parts, the chain transfer agent is 0.8 parts of mercaptopropionic acid, 320 parts of deionized water; wherein, the weight average molecular weight of the above-mentioned methoxypolyoxyethylene ether is 800, and the above-mentioned functional monomer is 2-acrylamide-2 - A combination of 8 parts of methylpropanesulfonic acid and 6 parts of methyl acrylate.

[0019] The preparation method of the above-mentioned polycarb...

Embodiment 3

[0020] Embodiment 3: The polycarboxylate water-reducer for small slump concrete of the present invention is made of the following raw materials in parts by mass: 160 parts of methoxy polyoxyethylene ether, 0.5 part of p-toluenesulfonic acid as catalyst , the polymerization inhibitor is 0.3 parts of p-hydroxyanisole, the water-carrying agent is 10 parts of butyl ester, a component of unsaturated acids and acid anhydrides is 17.5 parts of maleic anhydride (9.5 parts and 8 parts), and the function is single 20 parts of body, 1.2 parts of azobisisobutyronitrile as an initiator, 1.0 parts of thioglycolic acid as a chain transfer agent, and 290 parts of deionized water; wherein, the weight average molecular weight of the above-mentioned methoxypolyoxyethylene ether is 1000, and the above-mentioned The functional monomer is a combination of 8 parts of 2-acrylamido-2-methylpropanesulfonic acid and 12 parts of hydroxypropyl acrylate.

[0021] The preparation method of the above-mention...

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Abstract

The invention discloses a polycarboxylate water reducer for small-slump concrete, and a preparation method thereof. The water reducer is prepared from the following raw materials in parts by weight: 120-180 parts of methoxypolyoxyethylene ether, 0.5-0.8 part of catalyst, 0.1-0.3 part of polymerization inhibitor, 5-10 parts of water-carrying agent, 17-35 parts of one or two of unsaturated acid and anhydride, 14-20 parts of functional monomer, 0.8-1.5 parts of initiator, 0.8-1.6 parts of chain transfer agent, and 286-322 parts of deionized water. The invention further provides a preparation method of the water reducer. The polycarboxylate water reducer can be used in a constructional engineering in which the initial slump of concrete is less than 180mm, the polycarboxylate water reducer has good workability and flowing retentivity, thus expanding the applications of the polycarboxylate water reducer in the small-slump concrete engineering, such as applications in the fields of large-volume concrete, prefabricated member concrete, roller-compacted concrete and the like. The preparation method is simple in production technology, the reaction conditions are easily controlled, and no environment-friendly pollution occurs.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a polycarboxylate water reducer, in particular to a polycarboxylate water reducer for concrete with small slump, and belongs to the technical field of building materials. The invention also relates to a preparation method of a polycarboxylate water reducer, in particular to a preparation method of a polycarboxylate water reducer for concrete with small slump. Background technique [0002] In recent years, polycarboxylate superplasticizers have been favored by people in the construction industry due to their high water-reducing rate, low dosage, good cement adaptability, good slump performance, and environmental protection, and are widely used in large-fluid concrete middle. There is also a small slump concrete in concrete applications, that is, the slump of concrete is less than 180mm, which is mainly used in hydropower, nuclear power, prefabricated components and other projects. Small s...

Claims

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Application Information

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IPC IPC(8): C08F290/06C08F222/06C08F220/58C08F220/14C08F220/06C08F220/28C04B24/16C04B103/30
CPCC04B24/165C04B2103/302C08F290/062C08F220/281
Inventor 倪涛刘昭洋夏亮亮陶俊刘翠芬康静
Owner SICHUAN CHANGAN YUCAI BUILDING MATERIALS CO LTD
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