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A kind of sludge environment-friendly permeable brick and its preparation method

An environmentally friendly, permeable brick technology, applied in ceramic products, other household appliances, household appliances, etc., can solve the problem that water permeability, flexural strength, wear resistance and freeze-thaw resistance are difficult to meet the requirements, and cracks or cracks are easy to appear. Angle, the production process is not mature enough, etc., to achieve the effect of easy mixing and molding processing, reasonable matching and proportion, and low comprehensive utilization rate

Active Publication Date: 2020-06-02
武汉鹏森环境科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method is environmentally friendly, the firing time of the bricks is long and the energy consumption is high. In addition, the performance of the prepared brick products is unstable, and cracks or corners are prone to appear during use.
[0005] At present, the permeable bricks prepared by using sludge / sludge take a long time, the product weight is unstable, the water permeability, flexural strength, wear resistance and freeze-thaw resistance are difficult to meet the requirements, the production process is not mature enough, the processing time is long, and energy consumption High and unstable product performance, etc., so it is urgent to further study the use of sludge / silt to prepare permeable bricks

Method used

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  • A kind of sludge environment-friendly permeable brick and its preparation method

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preparation example Construction

[0021] As a preferred implementation mode, the preparation methods of the permeable bricks described in the following examples and comparative examples all include the following steps: Ⅰ. Measure each raw material into the stirring container in sequence according to weight percentage; Ⅱ. Add 2 to 20 Stir the mixed material with % water; Ⅲ. The mixed material is pressed and formed by a hydraulic press; Ⅳ. Curing the formed brick adobe at room temperature for 12-48 hours;

[0022] The inventors found that adjusting within the parameter range limited by the above preparation method has little effect on the efficacy of the prepared permeable brick, so the above method is the preferred preparation method of the present invention.

[0023] The method of the present invention will be further described below by taking specific implementation conditions as an example.

Embodiment 1

[0025] A sludge-friendly environment-friendly permeable brick, comprising the following raw materials in weight percentage: 70% of waste mud, 10% of coarse sand, 5% of silicon-aluminum-iron-calcium oxide, and 15% of cement; : 1 by weight ratio; the silicon-aluminum-iron-calcium oxide is mixed by fly ash, fine coal slag, and slag powder in a weight ratio of 2:0.5:1.

[0026] The moisture content of the sludge and the sludge is 12wt% after being treated with a special curing agent, and then passed through a 50-mesh sieve to obtain mud powder after pressure filtration, drying and roller grinding; the special curing agent is expansive soil, polypropylene A mixture of fiber, ferric chloride, cement, chitosan and quicklime, wherein the content of chitosan is 5%.

[0027] The particle size of the silicon-aluminum-iron-calcium oxide is ≤1mm.

[0028] More than 80% of the coarse sand has a particle size of 1-2 mm.

[0029] The preparation method of the sludge-friendly environment-fri...

Embodiment 2

[0031] A sludge-friendly environment-friendly permeable brick, comprising the following raw materials in weight percentage: 60% of waste mud, 5% of coarse sand, 5% of silicon-aluminum-iron-calcium oxide, and 30% of cement; the waste mud is silt; the silicon-aluminum Iron-calcium oxide is made by mixing fly ash and fine coal slag at a weight ratio of 2:1.

[0032]The water content of the waste mud is 4wt% after being treated with a special curing agent, and then through a 50-mesh sieve to obtain mud powder after pressure filtration, drying and roller grinding; the content of chitosan in the special curing agent is 3 %.

[0033] The particle size of the silicon-aluminum-iron-calcium oxide is ≤1mm.

[0034] More than 80% of the coarse sand has a particle size of 1-2 mm.

[0035] The preparation method of the sludge-friendly environment-friendly permeable brick comprises the following steps: Ⅰ. Measure each raw material according to the weight percentage and add it to the mixing...

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Abstract

The invention discloses a sludge and silt environment-friendly type water permeable brick. The sludge and silt environment-friendly type water permeable brick is prepared from the following raw materials in percentage by weight: 40-70% of waste mud, 5-25% of coarse sand, 5-25% of ferro-silico-aluminum calcium oxide, and 10-30% of cement; the waste mud is silt and / or sludge; and the ferro-silico-aluminum calcium oxide is one or a mixture of more of coal ash, fine coal cinder, slag powder or coal gangue. The sludge and silt environment-friendly type water permeable brick has the advantages of being good in water permeability, high in bending strength, good in wear resistance and strong in freeze thawing resistance, can be used as a novel paving material for sponge city construction; and moreover, silt / sludge is used as a main material, so that the condition that a silt / sludge comprehensive utilization rate is low and the environment is polluted is solved by realizing waste utilization, and the shortage problem of the sponge city new material is solved.

Description

technical field [0001] The invention relates to the technical field of sewage sludge environment-friendly permeable bricks, in particular to a sewage sludge environment-friendly permeable brick and a preparation method thereof. Background technique [0002] A large amount of silt or sludge is produced during the cleaning and remediation of rivers, canals, and lakes, which contains a large amount of heavy metals, bacteria, or organic pollutants. Improper treatment can easily cause secondary pollution to soil, groundwater, and air. Sludge / sludge is commonly used The most common treatment methods include ocean dumping, stacking to dry, and nearby burial, which will cause river and ocean pollution, the proliferation of stacked pollutants, and natural waste of land. [0003] Modern urban sidewalks are mostly paved with bricks to maintain the appearance and smoothness. At present, most of the paved clay bricks are fired bricks, which have poor water permeability. On the other han...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B38/00C04B111/40
Inventor 杨珈乐王景芸
Owner 武汉鹏森环境科技有限公司
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