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Autoclaved flyash-lime brick prepared from waste incineration flyash and preparation method for autoclaved flyash-lime brick

A technology of waste incineration fly ash and autoclaved fly ash bricks, which is applied in the field of building materials, can solve problems such as waste of resources and secondary pollution, and achieve the effects of saving resources, reducing the use of cement, and reducing costs

Inactive Publication Date: 2018-10-19
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If a large amount of desulfurized gypsum is not properly disposed of, it will not only waste resources, but also cause secondary pollution

Method used

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  • Autoclaved flyash-lime brick prepared from waste incineration flyash and preparation method for autoclaved flyash-lime brick
  • Autoclaved flyash-lime brick prepared from waste incineration flyash and preparation method for autoclaved flyash-lime brick
  • Autoclaved flyash-lime brick prepared from waste incineration flyash and preparation method for autoclaved flyash-lime brick

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for preparing autoclaved fly ash bricks by using waste incineration fly ash, comprising the following steps:

[0033] S1: Set Ca / Si to 1.26, weigh 5.30g of fly ash, 2.60g of municipal waste incineration fly ash, 1.80g of quicklime and 0.30g of desulfurized gypsum. The raw materials are fully dry mixed and mixed evenly;

[0034] S2: Put the uniformly mixed raw materials in S1 into an agate mortar, weigh 2g of deionized water, pour it into the agate mortar, and grind to make the water fully contact with the raw materials;

[0035] S3: put the ground raw material in S2 into a mould, press and form it on a tablet press (compression molding pressure 20MPa) and demould, to obtain a formed test block;

[0036] S4: Weigh 50g of deionized water and add it into a 500ml reaction kettle. Put a bracket higher than the water surface in the reactor; put the test block obtained in S3 on the bracket in the reactor for hydrothermal reaction, the reaction temperature is 220°C, ...

Embodiment 2

[0041] A method for preparing autoclaved fly ash bricks by using waste incineration fly ash, comprising the following steps:

[0042] S1: Set Ca / Si to 1.20, weigh 5.26g of fly ash, 2.94g of municipal waste incineration fly ash, 1.50g of quicklime and 0.30g of desulfurized gypsum. The raw materials are fully dry mixed and mixed evenly;

[0043] S2: Put the uniformly mixed raw materials in S1 into an agate mortar, weigh 2g of deionized water, pour it into the agate mortar, and grind to make the water fully contact with the raw materials;

[0044] S3: put the ground raw material in S2 into a mould, press and form it on a tablet press (compression molding pressure 20MPa) and demould, to obtain a formed test block;

[0045] S4: Weigh 50g of deionized water and add it into a 500ml reaction kettle. Put a bracket higher than the water surface in the reactor; put the test block obtained in S3 on the bracket in the reactor for hydrothermal reaction, the reaction temperature is 220°C, ...

Embodiment 3

[0050] A method for preparing autoclaved fly ash bricks by using waste incineration fly ash, comprising the following steps:

[0051]S1: Set Ca / Si to 1.10, weigh 5.71g of fly ash, 2.89g of municipal waste incineration fly ash, 1.40g of quicklime and 0.30g of desulfurized gypsum, and dry mix the raw materials fully and evenly;

[0052] S2: Put the uniformly mixed raw materials in S1 into an agate mortar, weigh 2g of deionized water, pour it into the agate mortar, and grind to make the water fully contact with the raw materials;

[0053] S3: put the ground raw material in S2 into a mould, press and form it on a tablet press (compression molding pressure 20MPa) and demould, to obtain a formed test piece;

[0054] S4: Weigh 50g of deionized water and add it into a 500ml reaction kettle. Put a bracket higher than the water surface in the reactor; put the test block obtained in S3 on the bracket in the reactor for hydrothermal reaction, the reaction temperature is 220°C, and the co...

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Abstract

The invention relates to an autoclaved flyash-lime brick prepared from waste incineration flyash and a preparation method for the autoclaved flyash-lime brick. The autoclaved flyash-lime brick is prepared from flyash, quicklime, the waste incineration flyash and desulfurization gypsum by compression molding and hydrothermal reaction, wherein the calcium-silicon ratio is 1.0 swung dash 1.3. The preparation method specifically comprises the following steps: uniformly mixing the flyash, the quicklime, the waste incineration flyash and the desulfurization gypsum; adding de-ionized water in an amount which is 15 to 25 percent of the total mass of the raw materials into the uniformly mixed raw materials, performing grinding and enabling the water to fully contact with the raw materials; loadingthe ground raw materials into a mold, performing compression molding on a pressing machine and performing demolding to obtain a molded test block; performing hydrothermal reaction on the molded test block in a hydrothermal reaction kettle to obtain a product. The autoclaved flyash-lime brick has the advantages of strong strength, low cracking rate, high freezing resistance and the like, the usingamount of cement is reduced, the solid waste flyash and the waste incineration flyash are also reduced, the burden of the environment and the cost are reduced, and energy saving and emission reductionare facilitated.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an autoclaved fly ash brick prepared by using waste incineration fly ash and a preparation method thereof. Background technique [0002] As we all know, the production of cement not only causes a large amount of exploitation of land resources and a large amount of energy consumption, but also the dust or particles generated during the production process will cause serious air pollution. Therefore, using solid wastes similar to cement chemical components as raw materials to partially replace cement has become one of the important measures to save resources, energy and protect the environment. Fly ash, municipal waste incineration fly ash, and desulfurized gypsum are gradually known as solid wastes with huge output. [0003] Fly ash is a fine-grained dispersed residue after pulverized coal combustion, mainly from pulverized coal furnaces and fluidized fluidized furnaces in power ...

Claims

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Application Information

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IPC IPC(8): C04B28/14
CPCC04B28/144C04B2201/50C04B18/08C04B22/064C04B18/105
Inventor 郭晓潞宋猛
Owner TONGJI UNIV
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