A kind of preparation method of cement composite additive

A compound additive and cement technology, applied in the field of building material manufacturing, can solve the problems of not reaching the designed service life, accelerating the corrosion and destruction of steel bars, etc.

Active Publication Date: 2016-11-30
北京龙阳伟业科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] During the project, many building basements, roofs, roads, and bridges could not reach the designed service life, and some projects were severely damaged after only a few years of use and had to be repaired. The main reason is that the current waterproof materials and concrete Agents generally contain Cl-,,,,, K+ ions too heavy, when added to concrete, react with active silica in concrete to form alkali silicate gel and cause concrete expansion and cracking, which is a common problem in engineering Alkali-aggregate reaction, while accelerating the corrosion of steel bars, resulting in concrete cracking and water seepage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method for cement composite additive, characterized in that:

[0027] The steps of the preparation method are:

[0028] Step (1): According to 32 parts of alumina clinker, 8 parts of calcined alunite, 2 parts of zinc sulfate, 12 parts of dickite, 12 parts of attapulgite clay, 12 parts of fly ash, 2 parts of zeolite powder, diatomaceous earth 3 parts, 4 parts of bentonite, 2 parts of methyl cellulose, 0.7 part of sodium sulfite, 0.7 part of quicklime, 0.4 part of calcium fluoride to prepare raw materials,

[0029] Step (2): 32 parts of alumina clinker, 8 parts of calcined alunite, 2 parts of zinc sulfate, and 12 parts of dickite are ground in a pulverizer at a speed of 120 r / min for 6 hours to obtain Mixture A particle size is 0.5-1mm,

[0030] Step (3): Grind 12 parts of attapulgite clay, 12 parts of fly ash, 2 parts of zeolite powder, 3 parts of diatomaceous earth, and 4 parts of bentonite in a pulverizer at a speed of 100 r / min for 2 Hour, obtain mixt...

Embodiment 2

[0033] A preparation method for cement composite additive, characterized in that:

[0034] The steps of the preparation method are:

[0035] Step (1): According to 30 parts of alumina clinker, 10 parts of calcined alunite, 5 parts of zinc sulfate, 20 parts of dickite, 20 parts of attapulgite clay, 10 parts of fly ash, 5 parts of zeolite powder, diatomaceous earth 2 parts, 5 parts of bentonite, 1 part of methyl cellulose, 1 part of sodium sulfite, 1 part of quicklime, 0.2 part of calcium fluoride to prepare raw materials,

[0036] Step (2): 30 parts of alumina clinker, 10 parts of calcined alunite, 5 parts of zinc sulfate, and 20 parts of dickite are ground in a pulverizer at a speed of 120 r / min for 6 hours to obtain Mixture A particle size is 0.5-1mm,

[0037] Step (3): Grind 20 parts of attapulgite clay, 10 parts of fly ash, 5 parts of zeolite powder, 2 parts of diatomaceous earth, and 5 parts of bentonite in a pulverizer at a speed of 100 r / min, grinding for 2 Hour, obta...

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PUM

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Abstract

The invention discloses a preparation method of a cement composite additive. The preparation method is characterized in that the cement composite additive is prepared from the following raw materials: aluminum oxygen chamotte, calcined alunite, zinc sulfate, dickite, attapulgite clay, fly ash, zeolite powder, diatomite, bentonite, methyl cellulose, sodium sulfite, quicklime and calcium fluoride. The cement composite additive disclosed by the invention has the functions of high-efficiency water prevention, moisture prevention, expansion, crack resistance, permeability resistance and the like and has no corroding effect on a steel bar.

Description

technical field [0001] The invention relates to a preparation method of a cement composite additive, which belongs to the field of building material manufacturing. Background technique [0002] During the project, many building basements, roofs, roads, and bridges could not reach the designed service life, and some projects were severely damaged after only a few years of use and had to be repaired. The main reason is that the current waterproof materials and concrete Agents generally contain Cl-,,,,, K+ ions too heavy, when added to concrete, react with active silica in concrete to form alkali silicate gel and cause concrete expansion and cracking, which is a common problem in engineering Alkali-aggregate reaction also accelerates the corrosion of steel bars, resulting in concrete cracking and water seepage. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for preparing a cement c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/38
Inventor 王辰悦
Owner 北京龙阳伟业科技股份有限公司
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