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A kind of preparation method of multifunctional polycarboxylate water reducer

A multifunctional, polycarboxylic acid technology, used in the field of concrete admixtures in the building materials industry, can solve the problem of no introduction of slump retention performance, and achieve the effects of high water reduction rate, improved hydration degree, and enhanced strength

Active Publication Date: 2018-12-25
信丰华轩建材有限公司
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  • A kind of preparation method of multifunctional polycarboxylate water reducer

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[0019] The present invention provides a kind of preparation method of multifunctional polycarboxylate water reducer, comprising the following steps:

[0020] 1. Selection of raw materials: 180 parts by mass of isopentenyl polyoxyethylene ether, 10 parts by mass of fumaric acid, 7 parts by mass of acrylic acid, 20-25 parts by mass of hydroxyethyl acrylate, 1-2 parts by mass of acrylamide methylpropanesulfonic acid 1-2 parts by mass of acrylamide, 1.5 parts by mass of oxidizing agent, 1 part by mass of reducing agent, 0.8 parts by mass of chain transfer agent, 5 parts by mass of sodium hydroxide, and 338.7-349.2 parts by mass of water.

[0021] 2. Add isopentenyl polyoxyethylene ether and fumaric acid into 120 parts by mass of water, stir to dissolve, then add an oxidant, and stir to obtain a uniform solution.

[0022] 3. Add acrylic acid, hydroxyethyl acrylate, acrylamidomethylpropanesulfonic acid, and acrylamide to 20 parts by mass of water to obtain 1# solution; add reducing ...

Embodiment 1-4

[0033] Examples 1-4 took materials according to the proportions in Table 1, and prepared four multifunctional polycarboxylate water reducers according to steps 1-3 of the present invention.

[0034] Table 1: Specific Implementation Material Proportion Unit / g

[0035]

Embodiment 5

[0037] The multi-functional polycarboxylate water-reducer prepared in Examples 1-4 of the present invention and the comparative sample were tested for the fluidity of cement paste, and the multi-functional polycarboxylate water-reducer prepared in Examples 1-4 of the present invention was replenished with water A transparent liquid with a solid content of about 40% was obtained. The comparative sample is a commercially available early-strength superplasticizer with a solid content of 40%.

[0038] Refer to GB / T8077-2000, 300g of cement, 87g of water, 0.6g of mixing amount, detailed test data are shown in Table 2:

[0039] Table 2: Fluidity test of clean pulp

[0040]

[0041] It can be seen from Table 2 that the polycarboxylate superplasticizer of the present invention has better adaptability at a lower dosage, and the initial embodiment 4 can adapt to various cements and has better slump-preserving effect.

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Abstract

The invention discloses a preparation method of a multifunctional polycarboxylate water reducer. In the method, 180 parts by mass of isopentenyl polyoxyethylene ether and 10 parts by mass of fumaric acid are added to 120 parts by mass of water, and then Oxidant, stirring to obtain a uniform solution; then 7 mass parts of acrylic acid, 20-25 mass parts of hydroxyethyl acrylate, 1-2 mass parts of acrylamide methylpropanesulfonic acid, and 1-2 mass parts of acrylamide are added to 20 mass parts of water, Obtain 1# solution; Add 1 mass part of reducing agent and 0.8 mass part of chain transfer agent into 50 mass parts of water to obtain 2# solution; dropwise add 1# solution and 2# solution in the obtained homogeneous solution; age at 40°C 1 hour, replenish the remaining water, stir for 0.5 hours, and obtain the multifunctional polycarboxylate water reducer; the multifunctional polycarboxylate water reducer prepared by the present invention has wide adaptability, excellent slump retention performance, and can improve the strength of concrete. features.

Description

technical field [0001] The invention belongs to the field of concrete admixtures in the building material industry, and in particular relates to a preparation method of a multifunctional polycarboxylate water reducer. Background technique [0002] Concrete, as the basic raw material of a country's basic construction, is widely used in civil engineering, and its consumption is huge. It is an indispensable material for the development of the national economy. [0003] High performance concrete is concrete with high durability, high workability and high volume stability. High-quality raw materials are used in the preparation process, and the water-binder ratio is usually low. In addition to cement, aggregate and water, finely ground mineral admixtures and high-performance admixtures are added, which not only greatly improves the performance of ordinary concrete, but also adopts modern new concrete Formulated with new technology, it has good applicability, high strength and hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F283/06C08F222/02C08F220/06C08F220/28C08F220/58C08F220/56C04B24/26C04B103/30
CPCC04B24/2694C08F283/065C04B2103/302C08F220/585C08F220/281
Inventor 王文锦施玉福练卫华李海清
Owner 信丰华轩建材有限公司
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