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Preparation method of cement composite additive

A composite additive and cement technology, which is applied in the field of building material manufacturing, can solve problems such as damage, concrete cracking and water seepage, and accelerated steel corrosion

Inactive Publication Date: 2016-01-27
王晓伟
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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 cannot reach the designed service life, and some projects have been seriously damaged after only a few years of use and have to be repaired. The main reason is that the current waterproof materials and concrete The agent generally contains Cl- and K+ ions too heavy. When it is added to the concrete, it reacts with the active silica in the concrete to form an alkali silicate gel and cause the concrete to expand and crack. This is the common alkali-aggregate reaction in engineering. At the same time, it accelerates 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

[0020] A preparation method for cement composite additive, characterized in that:

[0021] The steps of the preparation method are:

[0022] 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,

[0023] 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,

[0024] 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

[0027] A preparation method for cement composite additive, characterized in that:

[0028] The steps of the preparation method are:

[0029] 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,

[0030] 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,

[0031] 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. Raw materials of the cement composite additive include alumina clinker, calcinated alunite, zinc sulfate, dickite, attapulgite clay, coal ash, zeolite powder, kieselguhr, bentonite, methyl celluloses, sodium sulfite, quick lime and calcium fluoride. The cement composite additive has the functions of efficient waterproofness, dampproofness, swelling prevention, cracking resistance, seepage prevention and the like, and does not corrode steel bars.

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 The agent generally contains too much Cl- and K+ ions. When it is added to the concrete, it reacts with the active silica in the concrete to form an alkali silicate gel and cause the concrete to expand and crack. This is the common alkali-aggregate reaction in engineering. , At the same time, it 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 p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B22/14C04B22/06C04B22/12
Inventor 王晓伟
Owner 王晓伟
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