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Efflorescence inhibitor for ordinary Portland cement

A technology of ordinary portland cement and efflorescence inhibitor, which is applied in the field of building materials, can solve the problems of inability to reduce the degree of efflorescence in the early stage and the degree of cement compression resistance in the secondary efflorescence degree, so as to reduce the source of alkali and reduce the migration , Improve the effect of later strength

Inactive Publication Date: 2020-12-11
CHINA RESOURCES CEMENT TECH RES DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art that cannot reduce the degree of early efflorescence, the degree of secondary efflorescence and the degree of compression resistance of cement, and provide a efflorescence inhibitor for ordinary portland cement

Method used

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  • Efflorescence inhibitor for ordinary Portland cement
  • Efflorescence inhibitor for ordinary Portland cement

Examples

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Effect test

Embodiment 1

[0027] An efflorescence inhibitor for ordinary Portland cement, comprising the following raw materials in parts by weight: 50 parts of ordinary Portland cement, 5 parts of sulphoaluminate cement; 35 parts of mineral powder; 5 parts of metakaolin; 5 parts of silica fume 1 part of activated white carbon black; 3 parts of latex powder; 0.1 part of cellulose ether; 0.1 part of starch ether;

[0028] Described latex powder is dispersible latex powder, model is 5044N, and described cellulose ether model is 35SK, and described starch ether model is FP6.

Embodiment 2

[0030] An efflorescence inhibitor for ordinary Portland cement, comprising the following raw materials in parts by weight: 50 parts of ordinary Portland cement, 5 parts of sulphoaluminate cement; 40 parts of mineral powder; 7 parts of metakaolin; 7 parts of silica fume 1 part of activated white carbon black; 3 parts of latex powder; 0.1 part of cellulose ether; 0.1 part of starch ether;

[0031] Described latex powder is dispersible latex powder, model is 5044N, and described cellulose ether model is 35SK, and described starch ether model is FP6.

Embodiment 3

[0033] An efflorescence inhibitor for ordinary Portland cement, comprising the following raw materials in parts by weight: 50 parts of ordinary Portland cement, 5 parts of sulphoaluminate cement; 45 parts of mineral powder; 10 parts of metakaolin; 10 parts of silica fume 1 part of activated white carbon black; 3 parts of latex powder; 0.1 part of cellulose ether; 0.1 part of starch ether;

[0034] Described latex powder is dispersible latex powder, and model is 5044N, and described cellulose ether model is 35SK, and described starch ether model is FP6.

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Abstract

The invention relates to an efflorescence inhibitor for ordinary Portland cement. The efflorescence inhibitor comprises the following raw materials in parts by weight: 5-10 parts of sulphoaluminate cement; 35-45 parts of mineral powder; 5-10 parts of metakaolin; 5-10 parts of silica fume; 1-2 parts of active white carbon black; 1-3 parts of latex powder; 0.1-0.3 parts of cellulose ether; and 0.05-0.15 parts of starch ether. According to the present invention, the efflorescence degree value, the calcium hydroxide content and the compressive strength value of a test piece using the efflorescenceinhibitor at each stage can be determined through a specified method, the performance of the efflorescence inhibitor can be quantitatively evaluated, and the early efflorescence degree and the secondary efflorescence degree can be effectively reduced; and the compactness of cement is improved, early shrinkage is reduced, and later compressive strength of the test piece is improved.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an efflorescence inhibitor of ordinary Portland cement. Background technique [0002] The main reason for wall efflorescence, commonly known as cement blooming, is that the cement product calcium hydroxide reacts with carbon dioxide in the atmosphere to form calcium carbonate and deposit on the surface of concrete products. Or: in the calcium hydroxide solution of the hydration product, when the water evaporates, the calcium hydroxide crystallizes in the concrete gap and gathers on its surface. In addition, limestone or building sand contains a certain amount of soluble alkali-containing organic matter, and the hydroxide, carbonate or other alkali-salt solutions formed by them can easily and quickly ooze "frost" on the concrete surface. salt” and frosting. The surface of ordinary Portland cement products is prone to efflorescence, which affects the appearance of cement product...

Claims

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Application Information

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IPC IPC(8): C04B28/06
CPCC04B28/06C04B22/00C04B14/106C04B14/062C04B18/146C04B18/12C04B24/24C04B24/383C04B24/38
Inventor 张新星林永权陈博文张宾张玉玲赵子荷赵有强
Owner CHINA RESOURCES CEMENT TECH RES DEV