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Modified methyl cellulose flocculant for underwater grouting and its manufacturing method

A technology of methyl cellulose and underwater grouting, which is applied in the field of clean grout, concrete mixes, and underwater pouring mortar, and can solve the problem of slump loss and underwater grouting mixes whose anti-dispersion properties of underwater grouting mixes need to be improved. Insufficient anti-dispersion performance, large slump loss and other problems, to achieve excellent anti-dispersion performance, reduce water pollution, and low cost

Active Publication Date: 2007-02-14
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing flocculants for underwater non-dispersible grouting mixtures use cellulose-based flocculants, polysaccharide polymer-based flocculants, and methylcellulose flocculants. The disadvantage is that the underwater grouting mixtures are resistant to dispersion. Insufficient performance, poor fluidity, large slump loss, large strength loss due to material dispersion after hardening
The existing methyl cellulose flocculant needs to improve the dispersion resistance and fluidity of the underwater grouting mixture, and the slump loss needs to be further reduced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 2

[0015] The manufacturing method-2 of the modified methylcellulose flocculant for underwater grouting of the present invention. In the methylcellulose-acrylamide copolymer powder made by the same manufacturing method as in Example 1, 1.5 parts by weight of sulfamate condensate powder, 0.1 parts by weight of sulfamate condensate powder, and 0.1 parts by weight of 20% Polycarboxylate vulcanizing agent and 0.1 part by weight of melamine-formaldehyde condensate are used to prepare modified methylcellulose flocculant-2.

specific Embodiment approach 3

[0016] A commercially available methylcellulose flocculant was used as a comparative example.

specific Embodiment approach 1

[0017] The performance test of the underwater grouting mixture prepared by the modified methyl cellulose flocculant 1 and 2 made in specific embodiment 1 and specific embodiment 2 and the methyl cellulose flocculant of specific embodiment 3 for comparison Listed in Table 1 and Table 2, Table 1 is the slump test of the underwater grouting mixture, and Table 2 is the compressive strength test of the underwater grouting mixture, wherein the proportion of the underwater grouting mixture by weight is as follows:

[0018] Cement: water: sand: stone: flocculant = 1:0.44:1.5:2.3:0.03

[0019]

[0020]

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PUM

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Abstract

The present invention relates to one kind of modified methyl cellulose flocculant for underwater grouting mortar, cement slurry and concrete. The modified methyl cellulose flocculant is methyl cellulose-acrylamide copolymer prepared through polymerizing methyl cellulose and acrylamide while introducing nitrogen and adding potassium persulfate, ferrous chloride or ammonium persulfate. The modified methyl cellulose flocculant may have amido sulfate-formaldehyde condensate, polycarboxyl acid sulfidizer and melamine-formaldehyde condensate added. The modified methyl cellulose flocculant makes the underwater grouted mixture possess excellent antidispersivity and result in less water pollution and less strength loss.

Description

technical field [0001] The invention relates to a modified methyl cellulose flocculant for underwater grouting and a manufacturing method, which is used for underwater pouring of mortar, clean slurry and concrete mixture. Background technique [0002] The existing flocculants for underwater non-dispersible grouting mixtures use cellulose-based flocculants, polysaccharide polymer-based flocculants, and methylcellulose flocculants. The disadvantage is that the underwater grouting mixtures are resistant to dispersion. Insufficient performance, poor fluidity, large slump loss, and large strength loss due to material dispersion after hardening. The existing methyl cellulose flocculants still need to improve the dispersion resistance and fluidity of the underwater grouting mixture, and the slump loss needs to be further reduced. Contents of the invention [0003] The technical problem to be solved by the present invention is to avoid the deficiencies in the above-mentioned prio...

Claims

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Application Information

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IPC IPC(8): C04B24/24C04B24/38
Inventor 张长民林鲜周伟丁新龙许海彬
Owner BC P INC CHINA NAT PETROLEUM CORP
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