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Process for preparing building template by using fly ash and prepared building template

A technology of building formwork and fly ash, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of complex binder system, high carbon content, high cost, etc., and achieve low production cost, Pollution reduction, light weight effect

Inactive Publication Date: 2012-04-25
FUJIAN LONGYAN LONGNENG FRYASH COMPREHENSIVE UTILIZATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scheme disclosed in this patent has obvious disadvantages: firstly, the fly ash used has not undergone decarburization treatment, and the carbon content is high, and the excessively high carbon content makes the strength of the prepared board low, and the actual use Severely limited, high water absorption and perishable; secondly, the adhesive system in the patented formula is complex, and the content of adhesive is too high, resulting in high cost, and also violates the original intention of environmental protection and green
The preparation method of this patent application is relatively complicated, and it uses plastics to melt at high temperature to bond the components, so the strength of the obtained board is low

Method used

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  • Process for preparing building template by using fly ash and prepared building template
  • Process for preparing building template by using fly ash and prepared building template
  • Process for preparing building template by using fly ash and prepared building template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] In this embodiment, fly ash is used to manufacture building formwork, and the fly ash used is the fly ash of a circulating fluidized bed boiler, which is in the form of sponge floc. The fly ash includes: 48%-52% silicon dioxide, 6%-7% calcium oxide, 20%-28% aluminum oxide, 5%-7.2% ferric oxide, 1.8%- 2.1% magnesium oxide, 1%-1.25% sulfur trioxide, the loss on ignition is 6%-8%, and the carbon content is 10%-12%. The fly ash is decarburized so that its carbon content is not higher than 5% before building formwork is manufactured. Such as figure 1 As shown, the decarburization process includes the following steps:

[0052] A, adding flotation agent and / or collector to the fly ash raw material to form a mixed material;

[0053] B, in the flotation equipment, the mixed material obtained in the step A is dropped from the top of the flotation equipment;

[0054] C, forming upward blowing gas in the flotation device, the gas forms countercurrent contact with the mixed mate...

Embodiment 2

[0076] In this embodiment, the fly ash of the circulating fluidized bed boiler after decarburization is used to manufacture building templates, and the process of decarbonization is the same as that of embodiment 1.

[0077] In this embodiment, the steps of preparing building formwork using decarbonized fly ash are as follows:

[0078] 1. By weight, 45% of fly ash after decarburization, 45% of bamboo chips, and 10% of phenolic resin are mixed;

[0079] ② stirring the mixture obtained in step ①;

[0080] ③After paving the mixture stirred in step ②, pre-press with a pressure of 1.6MPa;

[0081] ④The mixture pre-pressed in step ③ is hot-pressed at 210°C with a pressure of 1.3MPa to a density of 0.90g / cm 3 template.

[0082] Wherein, the particle size of the fly ash in the step 1. is 340 orders, and the bamboo chips are 80 orders.

[0083] The prepared building formwork comprises by weight 45% decarbonized flocculent circulating fluidized bed boiler fly ash, 45% bamboo chips, ...

Embodiment 3

[0086] In this embodiment, the fly ash of the circulating fluidized bed boiler after decarburization is used to manufacture building templates, and the process of decarbonization is the same as that of embodiment 1.

[0087] In this embodiment, the steps of preparing building formwork using decarbonized fly ash are as follows:

[0088] 1. By weight, 58% of fly ash after decarburization, 30% of bamboo chips, and 12% of phenolic resin are mixed;

[0089] ② stirring the mixture obtained in step ①;

[0090] ③After paving the mixture stirred in step ②, pre-press with a pressure of 2.0MPa;

[0091] ④The mixture pre-pressed in step ③ was hot-pressed at 195°C with a pressure of 1.25MPa to form a template.

[0092] The prepared building formwork comprises 58% of decarbonized flocculent circulating fluidized bed boiler fly ash, 30% of bamboo chips and 12% of phenolic resin adhesive by weight.

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Abstract

The invention discloses a process for preparing a building template by using fly ash, comprising the following steps: 1) mixing 35-60 wt% of fly ash, 35-60 wt% of bamboo sawdust, and 5-20 wt% of binding agent; 2) stirring the mixture obtained by the step 1);3) precompressing the stirred mixture obtained by the step 2) after paving; and 4) carrying out hot pressing on the precompressed mixture obtained by the step 3) into a template. The use of the method not only reduces the pollution of industrial fly ash to the environment, but also can replace wood building templates or steel building templates widely used in present building construction. The prepared building template disclosed herein has the advantages of low production cost, light weight, high strength, impact resistance, and easy demoulding, and can be recycled. The invention greatly accelerates the process of recycling wastes.

Description

technical field [0001] The invention relates to the recycling utilization of fly ash, more specifically, the invention relates to a process for preparing building templates by using fly ash and the prepared building templates. Background technique [0002] At present, the annual discharge of fly ash industrial waste from coal-fired power plants and chemical industries in my country is increasing year by year. These fly ash are currently not only used to produce fly ash bricks, mixed into cement or concrete as building materials, but also piled up. For the ash storage yard of fly ash, this not only encroached on the land, but also caused serious "black pollution". On the other hand, when pouring concrete in construction projects, a large number of wooden building formwork or steel building formwork needs to be used, and the formwork engineering cost generally accounts for 20%-30% of the reinforced concrete structure engineering cost. [0003] Chinese patent 200610113578.3 dis...

Claims

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Application Information

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IPC IPC(8): C04B26/10C04B26/12C04B18/08
CPCY02W30/91
Inventor 许闽清
Owner FUJIAN LONGYAN LONGNENG FRYASH COMPREHENSIVE UTILIZATION
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