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Desulfurization ash-coal ash complex mineral admixture and preparation method thereof

A composite mineral and fly ash technology, which is applied in the direction of solid waste management, sustainable waste treatment, climate sustainability, etc., can solve the problems of insufficient understanding of the utilization potential of mixed desulfurization ash and fly ash, and achieve increased Compactness, strength promotion, and strength-enhancing effect

Active Publication Date: 2016-12-14
WUHAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] At present, most of the studies on the compounding of desulfurized ash and fly ash as cement concrete admixture are single-mixed desulfurized ash, fly ash or compounded with iron ore slag, and there is no potential for compounding desulfurized ash and fly ash. full understanding

Method used

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  • Desulfurization ash-coal ash complex mineral admixture and preparation method thereof
  • Desulfurization ash-coal ash complex mineral admixture and preparation method thereof
  • Desulfurization ash-coal ash complex mineral admixture and preparation method thereof

Examples

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Effect test

Embodiment 1

[0031] Preparation of desulfurization ash-fly ash composite mineral admixture: take the following raw materials by mass percentage: 40 parts of desulfurization ash, 52 parts of fly ash, 8 parts of enhanced activation materials (CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 , SO 3 According to the mass ratio of 63:25:7:3:2, the specific surface area is 6100cm 2 / g, the activity index is 150%) surface modifiers and grinding aids account for 0.3% and 0.2% of the sum of desulfurization ash, fly ash, and enhanced activation materials, respectively.

[0032] Put the above-mentioned raw materials into a ball mill, and grind them until the screening amount of a 45 μm square hole sieve is less than 10%, dry the ground materials at about 100°C, and mix them evenly in a V-type mixer after cooling to obtain modified desulfurization Ash-fly ash concrete composite mineral admixture. Apply the obtained composite mineral admixture to cement mortar (see Table 1 for specific proportions), replace 30% o...

Embodiment 2

[0034] Preparation of desulfurization ash-fly ash composite mineral admixture: take the following raw materials by mass percentage: 50 parts of desulfurization ash, 42 parts of fly ash, 8 parts of enhanced activation materials (CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 , SO 3 According to the mass ratio of 63:25:7:3:2, the specific surface area is 6100cm 2 / g, the activity index is 150%) surface modifiers and grinding aids account for 0.3% and 0.2% of the sum of desulfurization ash, fly ash, and enhanced activation materials, respectively.

[0035]Put the above-mentioned raw materials into a ball mill, and grind them until the screening amount of a 45 μm square hole sieve is less than 10%, dry the ground materials at about 100°C, and mix them evenly in a V-type mixer after cooling to obtain modified desulfurization Ash-fly ash concrete composite mineral admixture. The gained composite mineral admixture is applied in cement mortar (concrete proportioning is shown in Table 1), adopt...

Embodiment 3

[0037] Preparation of desulfurization ash-fly ash composite mineral admixture: take the following raw materials by mass percentage: 60 parts of desulfurization ash, 32 parts of fly ash, 8 parts of enhanced activation materials (CaO, SiO 2 、Al 2 o 3 , Fe 2 o 3 , SO 3 According to the mass ratio of 63:25:7:3:2, the specific surface area is 6100cm 2 / g, the activity index is 150%) surface modifiers and grinding aids account for 0.3% and 0.2% of the sum of desulfurization ash, fly ash, and enhanced activation materials, respectively.

[0038] Put the above-mentioned raw materials into a ball mill, and grind them until the screening amount of a 45 μm square hole sieve is less than 10%, dry the ground materials at about 100°C, and mix them evenly in a V-type mixer after cooling to obtain modified desulfurization Ash-fly ash concrete composite mineral admixture. The obtained composite mineral admixture is applied in cement mortar (see Table 1 for the specific proportion), and t...

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Abstract

The invention relates to a desulfurization ash-coal ash complex mineral admixture and a preparation method thereof. The admixture is prepared from, by mass, 40-70 parts of desulfurization ash, 22-52 parts of coal ash, 5-10 parts of reinforced activated material, surface modification agent and a grinding aid, the total mass of the desulfurization ash, the coal ash and the reinforced activated material is 100 parts, the mass of the surface modification agent accounts for 0.2-0.5% of the total mass of the desulfurization ash, the coal ash and the reinforced activated material, and the mass of the grinding aid accounts for 0.1-0.2% of the total mass of the desulfurization ash, the coal ash and the reinforced activated material. The two kinds of waste of the coal ash and the desulfurization ash serve as the raw materials, cost is low, environmental pollution is reduced, resource waste is avoided, and great economic benefits and environmental protection significance are achieved. In addition, the two kinds of waste of the coal ash and the desulfurization ash are doped at the same time, negative effects generated when the two kinds of matter are independently used as the concrete admixture are reduced, the comprehensive performance of obtained concrete is good, and use standards are met.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment and resource utilization, and relates to a desulfurization ash-fly ash composite mineral admixture and a preparation method thereof. Background technique [0002] At present, a large amount of cement is used in concrete, and the cement has high emission and high energy consumption problems in the production process, and the production cost is also high. Adding some industrial processing waste to concrete, such as desulfurization ash, fly ash, etc. to replace part of the cement, can not only effectively control the amount of cement, reduce production costs, but also realize waste utilization and reduce the pollution of these solid wastes to the environment. Recently, research on the use of these wastes as mineral admixtures for cement concrete has been carried out. Studies have shown that these admixtures can react slowly with cement hydration products to form hydration products with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B20/02C04B18/30C04B28/04
CPCY02W30/91C04B20/026C04B18/30C04B20/023C04B28/04C04B2201/50C04B18/08C04B18/0481C04B14/06C04B22/002
Inventor 李相国胡赞刘卓霖韩延昭杨蓉明添任钊锋
Owner WUHAN UNIV OF TECH
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