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Building hollow brick using industrial tailings and preparation method thereof

A technology for industrial tailings and hollow bricks is applied in the field of building hollow bricks to achieve good compressive strength, realize resource utilization and protect the environment.

Inactive Publication Date: 2012-06-20
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Using industrial waste (such as fly ash, slag, etc.) Unseen Patent Reports for Hollow Bricks

Method used

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  • Building hollow brick using industrial tailings and preparation method thereof
  • Building hollow brick using industrial tailings and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The present embodiment utilizes the building hollow brick of industrial tailings, and by weight percentage, its raw material composition comprises: iron tailings (grain size greater than 180 mesh particle weight accounts for 20% of total weight) 40%, fly ash 10%, ceramsite 30% %, water glass 13% (water glass modulus 2.8), polyaluminum phosphate accounts for 3% of water glass weight, sodium sulfate accounts for 1% of water glass weight, commonly used polycarboxylate water reducer (solid content is 40wt%) 0.5%, the balance in water.

[0036] The method for preparing building hollow bricks by using industrial tailings, the process steps of the method are: raw material metering and mixing-vibration (or pressure) molding-curing-demolding-curing-finished product; after the above-mentioned raw materials are fully mixed, the mixture Put it into a hollow brick mould, vibrate and compact it, and cure it at 20°C for 24 hours, demould after curing, and continue curing at room tempe...

Embodiment 2

[0038]The present embodiment utilizes the building hollow brick of industrial tailings, and by weight percentage, its raw material composition comprises: Copper tailings (grain size is greater than 180 order particle weight accounts for 25% of total weight) 40%, fly ash 15%, coarse sand 25% %, water glass 9% (water glass modulus 2.6), sodium sulfate accounts for 2% of the weight of water glass, commonly used lignin water reducer 0.5%, water balance.

[0039] The method for preparing building hollow bricks by using industrial tailings, the process steps of the method are: raw material metering and mixing-vibration (or pressure) molding-curing-demolding-curing-finished product; after the above-mentioned raw materials are fully mixed, the mixture Put it into a hollow brick mould, vibrate it compactly, cure it at 20°C for 2 days, demould after curing, and continue curing it at room temperature for 28 days to obtain a finished product with a porosity of 45% and a compressive strengt...

Embodiment 3

[0041] The present embodiment utilizes the construction hollow brick of industrial tailings, by weight percentage, and its raw material composition comprises: iron tailings (particle size greater than 180 mesh weight accounts for 30% of total weight) 45%, slag 18%, pebble 20%, boric acid Sodium 5%, commonly used naphthalene-based water reducer 0.3%, aluminum sulfate 1%, water balance.

[0042] The method for preparing building hollow bricks by using industrial tailings, the process steps of the method are: raw material metering and mixing-vibration (or pressure) molding-curing-demolding-curing-finished product; after the above-mentioned raw materials are fully mixed, the mixture Put it into a hollow brick mould, vibrate and compact it, and cure it at 50°C for 10 hours, demould after curing, and continue to cure it at room temperature for 28 days to obtain a finished product with a porosity of 50% and a compressive strength of 11.5 MPa.

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Abstract

The invention relates to the field of building hollow bricks, in particular to a building hollow brick using industrial tailings and a preparation method thereof. The invention especially relates to a burning-free and steaming-free building hollow brick prepared by using industrial iron tailings, copper mine tailings, boric sludge and other industrial wastes and a preparation method thereof. The building hollow brick comprises the following raw materials in percentage by weight: 30-80% of industrial tailings, 5-30% of at least one of cement, fly ash and slag, 0-50% of aggregate, 0-35% of inorganic adhesive and 0-5% of other additives, wherein the water accounts for 3-20% of the total weight of at least one of cement, fly ash and slag and the industrial tailings. The hollow brick is obtained by adding at least one of cement, fly ash and slag to the industrial tailings, vibrating the mixture or molding the mixture under the pressure, releasing the mold after curing the mixture and then continuing to cure the mixture for 28 days or to a strength of more than 5 MPa at room temperature. The hollow brick provided by the invention has the advantages of high strength, good freezing resistance, capability of realizing industrial tailing resources and the like.

Description

technical field [0001] The invention relates to the field of building hollow bricks, in particular to a building hollow brick using industrial tailings and a preparation method thereof, in particular to using industrial iron tailings, copper tailings, boron mud and other industrial wastes to prepare fire-free and steam-free building hollow bricks and its preparation method. Background technique [0002] Existing hollow bricks are fired from clay or cement. With the development of the construction industry, the demand for hollow bricks is increasing day by day. Manufacturing hollow bricks consumes a lot of resources, is costly, and pollutes the environment during the firing process. question. [0003] Industrial iron tailings, copper tailings, etc. are wastes after beneficiation and are common industrial solid wastes. According to incomplete statistics, more than 10 billion tons of tailings and waste rocks are discharged in the world every year. At present, there are more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16
CPCY02W30/91
Inventor 丁向群龚威
Owner SHENYANG JIANZHU UNIVERSITY
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