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Calculation and rational utilization method of fly ash resource utilization theoretical model

A theoretical model and resource-based technology, applied in the field of fly ash reuse, can solve the problems of secondary pollution and environmental risks, difficult application technology, etc., and achieve the effects of significant social and economic benefits, easy promotion, and no environmental risks.

Active Publication Date: 2021-01-26
福建威林特环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a method for calculating and rationally utilizing the theoretical model of fly ash resource utilization, so as to overcome the problems such as the difficulty in popularizing and applying technology of fly ash resource utilization, and the risk of secondary pollution to the environment.

Method used

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  • Calculation and rational utilization method of fly ash resource utilization theoretical model
  • Calculation and rational utilization method of fly ash resource utilization theoretical model
  • Calculation and rational utilization method of fly ash resource utilization theoretical model

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0099] The fine aggregate of solidified fly ash powder, with a particle size of 0.9mm to 0.075mm and below, is mixed into the concrete. The theoretical basis is that there are certain gaps between the particle gradations of the concrete, and the general commercial concrete is continuous. Grading, the grading of concrete with different grades is mostly different, and the void volume is also different. In order to scientifically mix the pulverized solidified fly ash fine aggregate into concrete in a certain amount, the size and distribution of voids in each cubic meter of concrete should be quantified first. By establishing a theoretical model, analyzing the size of concrete voids per cubic meter, and quantifying the proportion of voids in concrete. For example: C30 concrete has gaps of different sizes per cubic meter, and 5.0% to 8.0% of fly ash raw ash particles are selected to be mixed into the concrete.

[0100] The test shows that the fly ash particles with a median partic...

Embodiment approach 2

[0115] Change the continuous gradation of C30 concrete to a discontinuous gradation to obtain more voids in the concrete and absorb as many harmless solidified fly ash particles as possible, which can increase the solidified fly ash particles in the concrete. The dosage in concrete without reducing the strength and durability of concrete. E.g:

[0116] Dosage form: cement + admixture Ⅰ dosage: solidified fly ash particle dosage = ZⅠ: 12%: 10%.

[0117] The 28d strength of the prepared concrete is 44.1MPa~48.7MPa.

Embodiment approach 3

[0119] Application in highway road base.

[0120] 1) The mix ratio of the base course under the road:

[0121] Cement + admixture Ⅰ: fly ash: stone chips: gravel: water = 3.0%: 10%: 49%: 30%: 8.0%. The 7d immersion strength of the prepared concrete is ≥4.5MPa.

[0122] Cement + admixture II: fly ash: stone chips: gravel: water = 3.0%: 10%: 49.0%: 30%: 8.0%. The 7d immersion strength of the prepared concrete is ≥6.2MPa.

[0123] 2) Base mix ratio on highway road:

[0124] Cement + admixture Ⅰ: fly ash: stone chips: gravel: water = 4.0%: 10%: 48.0%: 30%: 8.0%. The 7d immersion strength of the prepared concrete is ≥5.5MPa.

[0125] Cement + admixture II: fly ash: stone chips: gravel: water = 4.0%: 10%: 48.0%: 30%: 8.0%. The 7d immersion strength of the prepared concrete is ≥7.5MPa.

[0126] In the lower base course of the cement stabilized layer of highway roads, the general cement content requirement is 3%, and the 7d immersion strength of the prepared concrete is ≥ 2.5MP...

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Abstract

The present invention relates to a method for calculating and rationally utilizing the theoretical model of fly ash resource utilization, comprising the following steps in sequence: A. Harmless treatment: collecting fly ash raw ash particles, and using PCSB curing agent to make the fly ash into a paste material After solidification, fly ash blocks are obtained; B. Drying: dry the solidified fly ash blocks to a moisture content of 15% to 20%; C. Crushing: crush the solidified fly ash blocks to less than 18 mesh, Solidified fly ash powder particles with a particle size of 0.9mm to 0.075mm or less; D. Blending: collect solidified fly ash powder particles, and mix solidified fly ash powder particles with a weight percentage of 2% to 10% into the concrete. The utilization method of the present invention can absorb a huge amount of fly ash, and can thoroughly solve the landfill construction landfill and environmental problems of fly ash; the single series of building material products formed have simple process, excellent performance, and lower overall cost than current products , not only easy to popularize, but also has no environmental risk, and has very significant social and economic benefits.

Description

technical field [0001] The invention relates to the field of fly ash reutilization, in particular to a utilization method calculated by a theoretical model of fly ash resource utilization which is designated as hazardous waste by the state. Background technique [0002] Fly ash is a hazardous waste produced during the incineration of domestic waste. Fly ash contains 12 heavy metals that are strictly controlled by the state. At present, most fly ash is chelated to stabilize heavy metals, and then landfilled after harmless disposal. This method costs about 1,500 yuan per ton of fly ash, and there is an environmental risk of heavy metals polluting groundwater in the process of landfilling fly ash. [0003] How to make this hazardous waste harmless and use it as a resource to form a product whose technical performance and performance can meet the requirements of the "national standard". At present, the use of cement kilns to co-process fly ash and use fly ash to calcine cement...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/02C04B18/08
CPCC04B18/08C04B28/02C04B2111/00017C04B2201/50C04B14/02C04B14/06Y02W30/91
Inventor 邓志达李荣林谋志李色篆曲喜群
Owner 福建威林特环保科技有限公司
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