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Method for producing compound cement blended directly with separated flyash and the made compound cement thereby

A technology of composite cement and production method, applied in the field of composite cement and fly ash composite cement, can solve the problems such as difficulty in breaking through 20% of fly ash content, prolonged setting time, change in cement performance, etc. The effect of decreasing porosity and increasing density

Inactive Publication Date: 2003-10-22
吴发辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And with the increase of the mixing amount, the cement strength also decreases.
If the amount of fly ash added exceeds 40%, the water consumption of the standard consistency will increase, the setting time will be prolonged, especially the early strength will be greatly reduced, and the cement performance will change significantly, affecting normal use.
In actual production, when producing 425# cement, the amount of fly ash added is difficult to exceed 20%.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0037] Example 1: 60 parts of cement clinker, 20 parts of pozzolanic burnt lime slag, 20 parts of sorted fly ash.

example 2

[0038] Example 2: 55 parts of cement clinker, 20 parts of pozzolanic zeolite as the mixed material, 5 parts of carbonate-type stone powder as a modified excitation material, and 20 parts of sorted fly ash.

[0039] Example 3, 50 parts of cement clinker, the mixed material is pozzolanic, including 10 parts of water drainage fly ash and 15 parts of slag steel slag, 5 parts of carbonate stone powder as a modified excitation material, and 20 parts of sorted fly ash .

[0040] Example 4, 40 parts of cement clinker, mixed materials are 15 parts of pozzolanic burnt shale, 10 parts of pyrite waste slag as a modified excitation material, 5 parts of carbonate stone powder, and 30 parts of sorted fly ash.

[0041] The method of the invention can produce various types of cement with different labels and different varieties, and the cement with a label above 425 shows its unique advantages of high performance, high quality and low cost.

[0042]

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Abstract

The production method of composite cement by directly adding separated flyash includes the following steps: placing the clinker and other mixing materials except for separated flyash into grinding machine together, grinding to obtain fine material, then placing the above-mentioned obtained fine powder and the described separated flyash into the powder-dressing machine to make separation, and the separated cement fine powder can be used as finished product and put into storage, and the coarse powder can be reground, the above-mentioned process can be repeated so as to obtain composite cement whose composition includes 15-50% of separated flyash, 15-30% of other mixing material and 30-60% of cement clinker.

Description

Technical field: [0001] The invention relates to building materials, more specifically to a production method of fly ash composite cement and the composite cement prepared by the method. Background technique: [0002] Fly ash composite cement can not only effectively reduce the cost of cement, but also turn a large amount of urgent industrial waste into treasure, which is beneficial to the country and the people, so it has a considerable application basis. [0003] In the traditional production method, the fly ash composite cement is all over-ground together with other admixtures and cement clinker. The problems brought about are not only greatly affecting the output of the mill, consuming mechanical and electrical energy, but also greatly affecting its strength level due to the destruction of the activity of the fine ash. Based on the current production method and my country's GB-1344-77 regulations, the amount of fly ash mixed in the fly ash composite cement is quite limi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/26C04B18/04C04B18/08C04B28/02
CPCC04B7/243C04B28/021Y02P40/10Y02W30/91C04B7/00C04B18/08C04B18/141C04B22/08
Inventor 吴发辉方凤娇吴艳
Owner 吴发辉
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