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Household garbage incineration ash concrete and preparation method thereof

A technology of domestic waste incineration and ash concrete, which is applied in the field of solid waste resource utilization, can solve the problems of reduced sanitary landfill storage capacity, ecological environmental hazards, and technical difficulty, and achieve good solidification of heavy metals and good adsorption effects

Active Publication Date: 2022-01-21
SHENZHEN HUAWEI ENVIRONMENTAL PROTECTION BUILDINGMATERIAL
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  • Abstract
  • Description
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Problems solved by technology

[0003] At present, the domestic waste incineration slag is mainly disposed of by sanitary landfill after stabilization, but with the gradual shortage of land resources, the storage capacity of sanitary landfill continues to decrease, coupled with the constraints of factors such as difficulty in site selection for new landfills, the domestic waste incineration slag Facing the trouble of nowhere to settle
[0004] Municipal solid waste incineration fly ash has been clearly listed as hazardous waste, which contains high concentrations of heavy metals and dioxins, which will cause serious harm to the ecological environment if not properly disposed of
At present, the treatment methods of domestic waste incineration fly ash mainly include cement solidification and stabilization, chemical treatment, and safe landfill, but there are generally problems of high disposal costs and technical difficulties

Method used

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  • Household garbage incineration ash concrete and preparation method thereof

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preparation example Construction

[0050] The preparation method of described modified fly ash sand and modified fly ash comprises the following steps:

[0051] The domestic garbage incineration fly ash, glass powder and limestone powder are mixed and then calcined to obtain calcined materials; the calcined materials are dechlorinated, crushed and screened in sequence to obtain the modified fly ash sand and modified fly ash.

[0052] In terms of parts by mass, the raw materials for the preparation of domestic waste incineration ash concrete in the present invention include 450 to 550 parts of coarse slag, preferably 500 to 500 parts; the particle diameter of the coarse slag is 4.75 to 26.5 mm; the bulk density is preferably 1100~1200kg / m 3 , more preferably 1180kg / m 3 .

[0053] Based on the mass fraction of the coarse slag, the raw materials for the preparation of domestic waste incineration ash concrete in the present invention include 360-440 parts of fine slag, preferably 360-400 parts; the particle size ...

Embodiment 1

[0089] In parts by weight, 1.2 parts of sodium hydroxide, 25 parts of water glass and 60 parts of water are mixed, stirred to dissolve the sodium hydroxide, and the liquid material is obtained after cooling;

[0090] Add 450 parts of coarse slag, 440 parts of fine slag, 60 parts of modified fly ash, 11 parts of modified fly ash and 110 parts of mineral powder into the concrete mixer and stir for 30 seconds to obtain solid materials;

[0091] adding the liquid material to the solid material, stirring in the concrete mixer for 240s to obtain the initial material;

[0092] Put the primary material into a concrete mold and vibrate it. After curing at room temperature (20±5° C.) for 24 hours, the mold is demoulded to obtain domestic waste incineration ash concrete.

Embodiment 2

[0094] In parts by weight, 2 parts of sodium hydroxide, 35 parts of water glass and 68 parts of water are mixed, stirred to dissolve the sodium hydroxide, and the liquid material is obtained after cooling;

[0095] Add 500 parts of coarse slag, 400 parts of fine slag, 40 parts of fly ash, 20 parts of fly ash and 130 parts of ore powder into the concrete mixer and stir for 45 seconds to obtain solid materials;

[0096] adding the liquid material to the solid material, stirring in the concrete mixer for 270s to obtain the initial material;

[0097] Put the primary material into a concrete mold and vibrate it. After curing at room temperature (20±5° C.) for 24 hours, the mold is demoulded to obtain domestic waste incineration ash concrete.

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Abstract

The invention provides household garbage incineration ash concrete and a preparation method thereof, and belongs to the technical field of solid waste resource utilization. In the household garbage incineration ash concrete provided by the invention, the coarse slag and the fine slag are prepared from the household garbage incineration slag, and the modified fly ash sand and the modified fly ash are prepared from the household garbage incineration fly ash, so that the trouble that the household garbage incineration ash occupies land and pollutes the land can be solved, and waste is turned into wealth; meanwhile, natural gravel resources and cementing materials can be saved, and the finally prepared household garbage incineration ash concrete can meet the use requirements of non-structural concrete. Results of the embodiment show that after the household garbage incineration ash concrete provided by the invention is subjected to standard curing for 28 days, the strength is 22.8-34.1MPa, and the leaching results of all heavy metal ions are qualified.

Description

technical field [0001] The invention relates to the technical field of solid waste resource utilization, in particular to a domestic waste incineration ash concrete and a preparation method thereof. Background technique [0002] Municipal solid waste incineration treatment has been widely used due to its obvious advantages of reduction, harmlessness and resource utilization. Domestic waste incineration treatment will produce domestic waste incineration ash, including domestic waste incineration slag and domestic waste incineration fly ash, of which , domestic waste incineration slag accounts for about 20% of the total mass of domestic waste, and domestic waste incineration fly ash accounts for about 5% of the total mass of domestic waste. [0003] At present, the domestic waste incineration slag is mainly disposed of by sanitary landfill after stabilization, but with the gradual shortage of land resources, the storage capacity of sanitary landfill continues to decrease, coup...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/26
CPCC04B28/26C04B2111/00017C04B2111/00775C04B2201/50C04B18/08C04B18/12C04B18/10C04B22/062C04B14/06
Inventor 关宇辛继宝杨正松陈为武辛晓婷何浩源
Owner SHENZHEN HUAWEI ENVIRONMENTAL PROTECTION BUILDINGMATERIAL
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