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Flyash cement auxiliary material and its use

A technology of fly ash cement and auxiliary materials, applied in cement production, sustainable waste treatment, solid waste management, etc., can solve problems affecting cement performance and achieve the effect of solving the three wastes

Inactive Publication Date: 2004-04-28
赖兆平 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Adding coal ash to cement clinker as an auxiliary material can reduce costs, but the amount added will greatly affect the performance of cement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Batching of the present invention is as follows: % by weight

[0047] Slag 30

[0048] lime or quicklime 30

[0049] Soot 35

[0050] plaster 5.

[0051] The slag can be slag produced by iron or alloy smelting.

[0052] Coal ash may also include cinders.

[0053] Ca from lime or quicklime ++ or (OH) - The ions act on the slag to form hydrates such as silicon hydrate and calcium aluminate hydrate.

[0054] The amount of gypsum depends on the setting time.

[0055] The above-mentioned raw materials are stacked in layers according to the proportion, and the order is as follows:

[0056] Smelting slag - quicklime - coal ash - gypsum. Crushed and stacked for 1-2 days, the product is ready.

Embodiment 2

[0058] Batching of the present invention is as follows:

[0059] Soot 30

[0060] Slag 35

[0061] Gypsum 3.5

[0062] quicklime 30

[0063] Sodium silicate 1

[0064] Sodium hydroxide 0.5

[0065] Sodium silicate (also available sodium borate), sodium hydroxide can stimulate the compatibility in slag, coal ash, make 80% noncompatibility glass beads wherein, become effective compound. When stacking, it can be stacked on top of plaster.

[0066] Production technology is identical with embodiment 1.

[0067] The product quality chemical analysis is as follows:

[0068] Lass 13.5 Sio3 22.1 fe2o3 8.2

[0069] Alo 1.82 Cao 42.5 Mgo 4.12

[0070] ∑ 84.15

[0071] Physical analysis:

[0072] Initial setting time 18 Final setting time 34

[0073] Flexural strength 1.8 Compressive strength 22

Embodiment 3

[0075] Product of the present invention is produced cement by following proportioning:

[0076] The present invention: Portland cement clinker=60:40.

[0077]The cement clinker of the present invention with a label above 525 is directly ground, and the fineness requirement is ≤10.0. The compressive strength of the produced cement is 33.8 in 3 days, and the flexural strength is 5.8. Its strength has reached the high label 425. cement.

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PUM

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Abstract

The auxiliary material for cement consists of metallurgical slag 10-35 wt%, flyash 30-50 wt%, lime or limestone 25-40 wt%, gypsum 5-10 wt%, sodium silicate or sodium borate 0-3 wt% and alkali 0-2 wt%. The preparation process includes crushing material, mixing and stacking for 1-2 days. The auxiliary material is mixed with Portland cement clinker in the weight ratio of 1 to 2-3 to produce cement product.

Description

Technical field: [0001] The invention relates to the production of auxiliary materials by using coal ash and smelting slag and its application. Background technique: [0002] Adding coal ash as an auxiliary material to cement clinker can reduce the cost, but the amount added will greatly affect the performance of cement. What was invented: [0003] The purpose of this invention is to provide a kind of cement auxiliary material which is made by using waste materials through simple processing, and a large amount of cement auxiliary material can be added to produce cement without affecting the performance of cement. [0004] The present invention is achieved like this: [0005] Fly ash cement auxiliary material of the present invention is made of the raw materials of following components and consumption: % by weight [0006] Treatment of smelting slag 10-35 [0007] Coal Ash 30-50 [0008] Lime or quicklime 25-40 [0009] Gypsum 3-10 [0010] Sodium silicate or sodium b...

Claims

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Application Information

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IPC IPC(8): C04B7/26C04B14/02C04B18/04
CPCY02P40/10Y02W30/91
Inventor 刘善清赖兆平
Owner 赖兆平
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