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Desulfurization ash-fly ash self-activating pavement base material

A pavement base material, fly ash technology, applied in sustainable waste treatment, solid waste management, climate sustainability, etc., can solve problems such as damage to the ecological environment around power plants and steel plants, restrict industry development, etc., and achieve excellent water stability. The effect of energy saving, resource saving, energy saving and environmental protection cost

Inactive Publication Date: 2017-12-29
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For coal-fired thermal power plants and steel mills with a daily output of hundreds of tons of desulfurization ash, if effective and reasonable desulfurization ash treatment methods cannot be adopted, it will not only cause damage to the power plant steel mills and the surrounding ecological environment, but also bring social consequences. A huge economic and social burden, seriously restricting the development of the industry

Method used

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  • Desulfurization ash-fly ash self-activating pavement base material
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  • Desulfurization ash-fly ash self-activating pavement base material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The self-activating pavement base was prepared by using Wuhan desulfurization ash and red high-speed railway fly ash from Guizhou: Weighed the desulfurization ash and Guizhou high-speed railway fly ash according to the design components in Table 1, and carried out a compaction test to determine the maximum amount of the mixture. Optimum moisture content and maximum dry density, according to the controlled degree of compaction molding specimens and determine its unconfined compressive strength. Change the content of desulfurization ash, carry out the unconfined compressive strength test according to the degree of compaction of 95%, the corresponding 7-day unconfined compressive strength, coefficient of variation and unconfined compressive strength under 95% strength guarantee rate The specific results are shown in Table 1.

[0037] From the performance indicators in Table 1, it can be seen that when the content of desulfurization ash is changed, the strength of the desul...

Embodiment 2

[0039] Use Wuhan desulfurization ash and Wuhan brown high-calcium fly ash to prepare self-activating pavement base: desulfurization ash and Wuhan fly ash are weighed according to the design components in Table 2, and compaction tests are carried out to determine the best mixture. Moisture content and maximum dry density, according to the controlled degree of compaction molding test pieces and determine their unconfined compressive strength. The unconfined compressive strength test was carried out according to the degree of compaction of 95% by changing the content of desulfurized ash. The results are shown in Table 2.

[0040] From the performance indicators in Table 2, it can be seen that when the content of desulfurization ash is changed, the strength of the desulfurization ash-Wuhan inferior high-calcium fly ash self-activating pavement base increases with the increase of desulfurization ash content; The maximum dry density decreased with the increase of desulfurization as...

Embodiment 3

[0042] Use Wuhan desulfurization ash and Guizhou brown high-calcium fly ash to prepare self-activating pavement base: desulfurization ash and Guizhou fly ash are weighed according to the design components in Table 3, and the compaction test is carried out to determine the best mixture. Moisture content and maximum dry density, according to the controlled degree of compaction molding test pieces and determine their unconfined compressive strength. The unconfined compressive strength test was carried out according to the degree of compaction of 95% by changing the content of desulfurized ash. The results are shown in Table 3.

[0043] From the performance indicators in Table 3, it can be seen that when the content of desulfurization ash is changed, the strength of the desulfurization ash-Guizhou high-calcium fly ash self-activated pavement base course increases with the increase of desulfurization ash content; The dry density decreased with the increase of desulfurization ash c...

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Abstract

The invention discloses a desulfurization ash-fly ash self-activated pavement base coarse material. The material comprises, by mass, 88-97% of desulfurization ash and 3-12% of fly ash. A large amount of a desulfurization ash industrial byproduct is used in the invention, so the land and resources and saved, environmental protection is facilitated, the cost is reduced, and the material is simple to construct, and is suitable for building general roads and high-grade road bases and / or subbases.

Description

technical field [0001] The invention relates to a pavement base material, in particular to a desulfurization ash-fly ash self-activating pavement base material. Background technique [0002] In recent years, the state has increased the SOE of major coal-fired enterprises 2 Emission control efforts, for SO 2 Emission control puts forward higher and higher requirements, but in most enterprises SO 2 While the emission is controlled, the new problem of increasing the emission of desulfurization ash is brought. The main source of desulfurization ash is coal-fired thermal power plants or steel mills. The industrial waste obtained from desulfurization of flue gas by dry or semi-dry calcium-based desulfurizers using different desulfurization processes currently lacks a reasonable way of utilization. Most of them are still stacked in the open air, which not only takes up a lot of land resources, but also seriously restricts the coordination of economic growth and environment. For...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B18/06
CPCC04B28/00C04B2111/00017C04B2111/00051C04B2111/0075C04B18/062C04B7/34Y02W30/91
Inventor 赵青林周孔金
Owner WUHAN UNIV OF TECH
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