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High-performance compound cement retarder and preparation method thereof

A cement retarder and high-performance technology, applied in the field of cement admixtures, can solve the problems of large amount of solid retarder, unfavorable industrial production, and high cost of retarder, achieving obvious retardation effect and improving early and late strength. , the effect of simple preparation process

Inactive Publication Date: 2020-11-17
南京腾恒新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The cost of the retarder prepared by this method is relatively high, which is unfavorable for popularization
The application number is CN201810629761.1, and the invention patent named cement retarder and its preparation method and application uses phosphogypsum, desulfurization ash, mineral powder and limestone powder to prepare a solid cement retarder, which effectively provides phosphogypsum and A comprehensive treatment plan for desulfurization ash, the prepared retarder has a good retarding effect, but this method requires the use of mineral powder with a high specific surface area, and the amount of solid retarder is large, so it is not conducive to industrial production

Method used

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  • High-performance compound cement retarder and preparation method thereof
  • High-performance compound cement retarder and preparation method thereof
  • High-performance compound cement retarder and preparation method thereof

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preparation example Construction

[0022] A high-performance composite cement retarder and a preparation method thereof, comprising the following components: a cationic surfactant, a silane coupling agent, glacial acetic acid, glucose, an organic solvent, and deionized water.

[0023] The preparation method of described high-performance composite type cement retarder comprises the following processing steps:

[0024] (1) Add silane coupling agent, organic solvent, and deionized water into the reaction kettle to form a hydrolysis system of silane coupling agent, the mass ratio of the silane coupling agent to the organic solvent is 0.1 to 1.0, and the The mass ratio of the silane coupling agent to the deionized water is 0.1-1.0.

[0025] (2) Carry out the hydrolysis reaction of the silane coupling agent at a temperature of 40-120° C., and the hydrolysis time is 0.5-4 hours.

[0026] (3) After the hydrolysis reaction of the silane coupling agent is completed, add glacial acetic acid to adjust the pH of the hydrol...

Embodiment 2

[0043] A high-performance composite cement retarder and a preparation method thereof, comprising the following components: a cationic surfactant, a silane coupling agent, glacial acetic acid, glucose, an organic solvent, and deionized water.

[0044] The preparation method of described high-performance composite type cement retarder comprises the following processing steps

[0045](1) 50 parts of silane coupling agent KH570, 50 parts of isopropanol and 150 parts of water were added to the reaction kettle to carry out the hydrolysis reaction of the silane coupling agent at 80°C, the hydrolysis time was 40min, and the pH of the hydrolyzed solution was adjusted by adding glacial acetic acid To 3-6, a silane coupling agent hydrolyzate is obtained. 50 parts of N-methyl-N-decylaminoethyl trimethyl ammonium bromide, 500 parts of glucose, 195 parts of deionized water were added to the stirring tank and stirred until a homogeneous phase, and then the silane coupling agent hydrolyzed so...

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Abstract

The invention discloses a high-performance compound cement retarder and a preparation method thereof. The preparation method comprises the following steps: adding a silane coupling agent, an organic solvent and deionized water into a reaction kettle to form a hydrolysis system of the silane coupling agent, and carrying out a hydrolysis reaction of the silane coupling agent at a temperature of 40-120 DEG C to obtain a silane coupling agent hydrolysate; and adding a cationic surfactant, glucose, deionized water and the silane coupling agent hydrolysate into a stirring kettle, and conducting stirring to a homogeneous phase, thereby obtaining the high-performance cement retarder. The cement retarder disclosed by the invention has an excellent retarding effect, is low in mixing amount, has a certain grinding aid effect on cement, and can improve the early and later strength of the cement.

Description

technical field [0001] The invention relates to the technical field of cement admixtures, in particular to a high-performance composite cement retarder and a preparation method thereof. Background technique [0002] Due to the complex road construction process and long time, in order to ensure the construction operation time and the quality of the base, cement retarder is required in the road construction process. In the current practical application, cement retarders mainly include the following categories: monohydric alcohols such as methanol, ethanol, etc., whose retarding time is not long, and cannot meet the operational requirements of road construction; polyhydric alcohols such as ethylene glycol, glycerin Alcohol, etc. have good retarding effect, but the dosage is high, generally 0.1-0.5%; sugars such as glucose, sucrose, etc., which have both retarding and thickening effects; carboxylic acids such as citric acid, tartaric acid , salicylic acid, etc., which have the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/22
CPCC04B40/0039C04B2103/22C04B2103/404C04B24/42C04B24/04C04B2103/0093C04B24/10C04B22/002C04B28/04
Inventor 董秋霞谢璞
Owner 南京腾恒新材料有限公司
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