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Preparation method of porous brick

A technology of porous bricks and adobes, applied in the field of building materials, can solve the problems of brick peeling, poor plasticity of construction waste, and damage to farmland, etc., and achieve the effect of good plasticity and high bearing strength

Inactive Publication Date: 2012-11-07
ZHEJIANG TERRA CONSTR MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] my country's traditional brick-making technology is to use clay to sinter bricks, which requires a large amount of arable land to be mined, causing farmland damage. Therefore, many companies have begun to produce porous bricks and use other materials to replace or partially replace clay. However, due to the fact that construction waste contains more cement Composition, easy to cause peeling of bricks, and the plasticity of construction waste is poor; while the strength of bricks made of domestic sludge is poor, and sintered bricks need to consume a lot of heat in the sintering process, which will cause waste of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A method for preparing porous bricks, using river silt, shale, construction waste, and sintering aids. The sintering aids are silicate or quicklime or a mixture of silicate and quicklime with a particle diameter of 0.1 mm or less, including The following steps:

[0023] Step 1: removing impurities from construction waste, crushing, and screening out construction waste powder with a particle diameter of less than 1 mm, crushing shale into shale powder with a particle diameter of less than 2 mm, and deodorizing river sludge;

[0024] Step 2: Take river silt, construction waste powder, shale powder, and sintering additives and mix them in a weight ratio of 3:2.5:1.5:0.3 to form a uniform mixture;

[0025] Step 3, stacking and aging the uniformly stirred mixture for more than 72 hours, so that the moisture content is below 18%;

[0026] Step 4, stirring the mixture after stacking and aging for 20 minutes again;

[0027] Step 5. Extrude the re-stirred mixture into adobe by...

Embodiment 2

[0032] The difference from Example 1 is that in the step 2, river silt, construction waste powder, shale powder, and sintering aid are mixed in the weight ratio of 4:3.5:2.5:0.8 to form a uniform mixture. In the step 4, the mixture after stacking and aging was stirred again for 30 minutes. The drying time of the adobe is 5 hours. The sintering temperature of the adobe is 1100°C. The sintering time of the adobe is 20 hours. When the mixture is prepared, 5% iron powder or iron oxide powder equivalent to the weight of the mixture in terms of dry weight is added.

[0033] The amount of construction waste powder used in this embodiment is more, and the strength of the brick body obtained is better. Adding a large amount of sintering aid can improve the plasticity of the brick body. More iron powder or iron oxide powder is added, and the color of the brick is better.

Embodiment 3

[0035] The difference from Example 1 and Example 2 is that in the step 2, river silt, construction waste powder, shale powder, and sintering aid are mixed and stirred in a weight ratio of 3.5:3:2:0.5 to form a uniform of the mixture. In the step 4, the mixture after stacking and aging was stirred again for 25 minutes. The drying time of the adobe was 4 hours. The sintering temperature of the adobe is 1050°C. The sintering time of the adobe is 16 hours. When the mixture is prepared, 0.03% iron powder or iron oxide powder equivalent to the weight of the mixture in terms of dry weight is added.

[0036] In this embodiment, the amount of river silt, construction waste powder, shale powder and sintering aids is moderate, the strength and plasticity can be guaranteed, the sintering time and temperature are moderate, and the production cycle is reasonable.

[0037] The construction waste in the present invention is construction concrete, construction waste bricks, construction wa...

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Abstract

The invention provides a preparation method of a porous brick. Riverway sludge, shale, construction wastes and a sintering aid are adopted, wherein the sintering aid is silicate or quick lime or a mixture of silicate and quick lime with the particle diameter being below 0.1mm, and the all wastes are crushed, then mixed according to certain proportion, then aged and stirred secondarily, and then the brick is prepared and put into a tunnel kiln to be dried and sintered so as to form the porous brick.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a method for preparing porous bricks. Background technique [0002] my country's traditional brick-making technology is to use clay to sinter bricks, which requires a large amount of arable land to be mined, causing farmland damage. Therefore, many companies have begun to produce porous bricks and use other materials to replace or partially replace clay. However, due to the fact that construction waste contains more cement Composition, easy to cause peeling of bricks, and the plasticity of construction waste is poor; while the strength of bricks made of domestic sludge is poor, and sintered bricks need to consume a lot of heat during the sintering process, which will cause waste of energy. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing porous bricks, which can effectively utilize river silt, sh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B30/00C04B38/00
Inventor 吴三群
Owner ZHEJIANG TERRA CONSTR MATERIAL