Cement-based grouting material containing modified melamine water reducer and preparation method thereof

A technology of melamine and grouting materials, which is applied in the field of cement-based grouting materials containing modified melamine water reducers and its preparation, which can solve the problem that the high cost of water reduction can not meet the needs, and it is impossible to determine whether it can really achieve the effect it claims. , did not disclose the preparation method of self-made modified sulfonating agent and other issues

Inactive Publication Date: 2011-12-07
广州滕泰建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, with the increase of people's demand for concrete, especially high-efficiency concrete quality and dosage, the water-reducing effect and high cost of this high-efficiency water reducer can no longer meet the needs
[0007] CN101386488 discloses a carboxylic acid modified melamine high-efficiency water reducer, in which melamine, formaldehyde, sulfamic acid, salicylic acid, citric acid, phenol, self-made modified sulfonating agent and alkali are mainly used as raw materials. The improvement of existing water reducers is mainly achieved by introducing carboxyl groups and benzene rings, and there is no disclosed method for preparing self-made modified sulfonating agents, which makes it impossible for those skilled in the art to realize their inventions; Described the many advantages of the invention compared to the prior art, but did not give specific experimental data, and those skilled in the art cannot determine whether it can really achieve the effect it claims

Method used

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  • Cement-based grouting material containing modified melamine water reducer and preparation method thereof
  • Cement-based grouting material containing modified melamine water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0037] At room temperature, add concentration to 600Kg water and be 14Kg of sodium hydroxide aqueous solution of 10% by weight, mix uniformly, then add 280Kg phenol, 860Kg sulfanilate, 4300Kg concentration and be the formaldehyde aqueous solution of 36% by weight, after continuing to mix uniformly, Add 220Kg of urea and 1500Kg of melamine, mix, raise the temperature to 80-100°C, and keep warm for 10-50 minutes after the material changes from cloudy to clear to obtain mixture I;

[0038] 2), add 2000Kg water, 1800Kg sodium metabisulfite and 90Kg aqueous sodium hydroxide solution with a concentration of 20% by weight to the mixture I, mix well, raise the temperature to 90-105° C., and keep the temperature for 1-2 hours to obtain the mixture II;

[0039] 3) Add 20Kg of 98% by weight concentrated sulfuric acid to mixture II, then add 30Kg of water, mix well, and keep the temperature at 25°C for 3 hours to obtain mixture III;

[0040] 4) Add 80Kg aqueous sodium hydroxide solution w...

preparation Embodiment 2

[0042] Other conditions are the same as in Example 1, except that 100Kg phenol and 400Kg urea replace 280Kg phenol and 220Kg urea in Example 1.

preparation Embodiment 3

[0044] Other conditions are the same as in Example 1, except that 280Kg of phenol and 220Kg of urea in Example 1 are replaced with 400Kg of phenol and 100Kg of urea.

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Abstract

The invention provides a modified melamine water reducer-containing cement-based grouting material and a preparation method thereof. The grouting material comprises: by weight, 350 to 500 parts of cement clinkers, 80 to 130 parts of fly ash, 20 to 30 parts of an expanding agent, 80 to 120 parts of gypsum, 1 to 2 parts of a pH regulator, 8 to 15 parts of a modified melamine water reducer and 300 to 500 parts of quartz sand, wherein the modified melamine water reducer is prepared from phenol, urea, an aminobenzenesulfonate, formaldehyde, melamine, sodium pyrosulfite, sodium hydroxide, triethanolamine, an acid catalyst and a solvent. The modified melamine water reducer-containing cement-based grouting material has the advantages of high strength, low cost and excellent early strength performances.

Description

technical field [0001] The invention relates to a building material and a preparation method thereof, in particular to a cement-based grouting material containing a modified melamine water reducer and a preparation method thereof. Background technique [0002] Because of its high brittleness, concrete structures tend to crack in engineering applications, and concrete cracking will lead to the decline of water tightness and leakage of concrete structures, thereby affecting the service life of the project. Therefore, in the construction and use stage, many projects such as water conservancy, railways, highways, bridges, etc. inevitably require grouting materials to repair and reinforce cracks. The installation of many large-scale instruments also requires high-performance grouting materials to pour anchor bolts and machine bases or joints between steel structures and foundations. [0003] There are many commonly used grouting materials for repairing and strengthening concrete...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14C04B24/16C04B103/30
Inventor 马清浩
Owner 广州滕泰建材科技有限公司
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