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Mud-resistant polycarboxylate superplasticizer and preparation method thereof

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of anti-mud polycarboxylate water reducing agent and its preparation field, can solve the problem that the polycarboxylate water reducing agent is easily adsorbed by the surface of soil particles and the like

Pending Publication Date: 2021-05-11
深圳市正强混凝土有限公司
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to improve the problem that polycarboxylate superplasticizer is easily absorbed by the surface of soil particles, the application provides a mud-resistant polycarboxylate superplasticizer and its preparation method

Method used

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  • Mud-resistant polycarboxylate superplasticizer and preparation method thereof
  • Mud-resistant polycarboxylate superplasticizer and preparation method thereof
  • Mud-resistant polycarboxylate superplasticizer and preparation method thereof

Examples

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Embodiment 1-6

[0033] The following is illustrated by taking Example 1 as an example, a preparation method of mud-resistant polycarboxylate superplasticizer, comprising the following steps:

[0034] Solution preparation: dissolving propylene polyoxyethylene ether and lauroyl peroxide in 70ml water to form aqueous solution A; dissolving sodium methacrylate in 5ml water to form aqueous solution B; acrylic acid, hydroxyethyl methacrylate, 2-methyl -2 Butenoic acid and sodium ethyl methacrylate sulfonate were dissolved in 120ml of water to form aqueous solution C; potassium chloride was dissolved in 5ml of water to form aqueous solution D.

[0035] Heating reaction: Put the aqueous solution A into the reaction container, heat and stir until the temperature is 60°C, then add the aqueous solution B dropwise to the aqueous solution A first, and then add the aqueous solution C dropwise after the aqueous solution B is added dropwise, within 1 hour, mix the aqueous solution B and After the aqueous sol...

Embodiment 7-10

[0044] As shown in Table 3, compared with Example 2, the main difference between the mud-resistant polycarboxylate superplasticizers of Examples 7-10 lies in the different reaction temperature and time during the preparation of the superplasticizer.

[0045] Preparation process parameter table in each embodiment of table 3

[0046]

[0047]

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Abstract

The invention relates to the field of concrete admixtures, and particularly discloses a mud-resistant polycarboxylate superplasticizer and a preparation method thereof. The mud-resistant polycarboxylate superplasticizer is prepared from the following raw materials in parts by weight through polymerization: 5 to 15 parts of acrylic acid, 10 to 25 parts of hydroxyethyl methylacrylate, 25 to 35 parts of 2-methyl-2-butenoic acid, 6 to 10 parts of sodium ethyl methacrylate sulfonate, 30 to 40 parts of allyl polyoxyethylene ether, 1 to 3 parts of an initiator, 1 to 2 parts of a chain transfer agent and 1 to 2 parts of a sacrificial agent. The preparation method of the mud-resistant polycarboxylate superplasticizer comprises the steps of solution preparation, heating reaction and acidity neutralization, and the prepared mud-resistant polycarboxylate superplasticizer has a good anti-mud effect and also has good dispersity and fluidity.

Description

technical field [0001] The present application relates to the field of concrete admixtures, in particular to a mud-resistant polycarboxylate water reducer and a preparation method thereof. Background technique [0002] With the acceleration of urbanization and the corresponding rapid development of construction technology, the demand for concrete in the construction industry is also increasing. Water reducing agent is widely used in the concrete industry as a high-efficiency additive to improve the performance of concrete. Water reducer refers to the ability to reduce the amount of mixing water and increase the strength of concrete under the condition of the workability of concrete and the amount of cement remaining unchanged. The water reducers currently on the market are mainly divided into three categories: the first generation lignin water reducer, the second generation naphthalene water reducer and the third generation polycarboxylate water reducer. Polycarboxylate su...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/06C08F220/20C08F220/04C08F220/38C04B24/16C04B103/30
CPCC08F283/065C04B24/165C04B2103/302C08F220/06C08F220/20C08F220/04C08F220/382
Inventor 冼得明刘少飞匡俊峰
Owner 深圳市正强混凝土有限公司
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