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Circulating fluidized bed boiler ash cement-based self-leveling material

A sulfur-fixing ash, cement-based technology, applied in the field of self-leveling materials for construction and cement-based self-leveling materials for sulfur-fixing ash, can solve the problems of corrosion of iron parts, limited use range, poor water resistance, etc., to save cement consumption, reduce Waste of land resources and cost reduction effect

Inactive Publication Date: 2012-06-27
SOUTHWEAT UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Organic self-leveling materials are relatively expensive, and gypsum-based self-leveling materials have poor water resistance and are neutral or acidic, which may corrode iron parts, so the scope of use is limited
No, there is no research report on the preparation of cement-based self-leveling mortar with sulfur-fixed ash

Method used

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  • Circulating fluidized bed boiler ash cement-based self-leveling material
  • Circulating fluidized bed boiler ash cement-based self-leveling material
  • Circulating fluidized bed boiler ash cement-based self-leveling material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of sulfur-fixed ash cement-based self-leveling material, its composition and the weight percentage of each component include: 14% of sulfur-fixed ash, 22% of ordinary Portland cement, 9% of aluminate cement, 16.5% of heavy calcium powder, Redispersible latex powder 1.5%, defoamer 0.07%, polycarboxylate superplasticizer 0.07%, lithium carbonate 0.17%, hydroxyethyl methyl cellulose ether 0.06%, citric acid 0.1%, sand 36.53%;

[0050] Wherein: the sulfur-fixing ash is the sulfur-fixing ash discharged from the circulating fluidized bed or the sulfur-fixing ash after grinding by a mill; the sand particle size is controlled at 20-300 mesh; during construction, according to the weight percentage Example ingredients and fully mixed to make mortar dry powder, and then according to the water-material ratio of 0.230 (that is, the weight ratio of water: mortar dry powder is 0.230:1), add water and mix well before construction, that is, after the slurry is paved and maintained...

Embodiment 2

[0052] A kind of sulfur-fixed ash cement-based self-leveling material, its composition and the weight percentage of each component include: 18% of sulfur-fixed ash, 18% of ordinary Portland cement, 8% of aluminate cement, 16% of heavy calcium powder, 0.1% defoamer, 1.5% redispersible latex powder, 0.07% polycarboxylate superplasticizer, 0.17% lithium carbonate, 0.06% methyl hydroxyethyl cellulose ether, 0.1% citric acid, 38% sand;

[0053] Wherein: the sulfur-fixing ash is the sulfur-fixing ash discharged from the circulating fluidized bed or the sulfur-fixing ash after grinding by a mill; the sand particle size is controlled at 20-300 mesh; during construction, according to the weight percentage Example ingredients and fully mixed to make mortar dry powder, then according to the water-material ratio of 0.248 (that is, the weight ratio of water: mortar dry powder is 0.248:1), add water and mix well before construction, that is, after slurry paving and maintenance, performance c...

Embodiment 3

[0055] A kind of sulfur-fixed ash cement-based self-leveling material, its composition and the weight percentage of each component include: sulfur-fixed ash and sulfur-fixed slag (can be mixed in any proportion) 22%, ordinary Portland cement 14%, sulfur-aluminum Salt cement 9%, heavy calcium powder 14.5%, dispersible latex powder 2%, defoamer 0.1%, polycarboxylate superplasticizer 0.08%, lithium carbonate 0.15%, methyl hydroxyethyl cellulose ether 0.05% , citric acid 0.12%, sand 38%;

[0056] Wherein: the sulfur-fixing ash is the sulfur-fixing ash discharged from the circulating fluidized bed or the sulfur-fixing ash after grinding by a mill, and the sulfur-fixing slag is the sulfur-fixing slag after grinding; the sand particle size is controlled at 20 ~300 mesh. During construction, mix the ingredients according to the stated weight percentage and fully mix them to obtain dry mortar powder, then add water and mix well according to the water-material ratio of 0.256 (that is, ...

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Abstract

The invention discloses a circulating fluidized bed boiler ash cement-based self-leveling material, which is characterized by comprising the following components in percentage by weight: 10-70 percent of circulating fluidized bed boiler ash or / and cycled fluidized bed ash, 0-30 percent of silicate cement, 0-20 percent of aluminate cement or sulphoaluminate cement, 0-22 percent of inorganic filler, 0-3.5 percent of redispersible emulsion powder, 0-0.25 percent of early strength agent, 0-0.09 percent of water retention agent, 0-0.15 percent of defoaming agent, 0-1.0 percent of water reducing agent, 0-0.25 percent of inhibiting agent and 0-50 percent of sand. The cement-based self-leveling material is prepared by taking circulating fluidized bed boiler ash or / and cycled fluidized bed ash and the like as raw materials, so that circulating fluidized bed boiler ash or residues discharged by a circulating fluidized bed can be fully utilized, the waste of land resources and the pollution to the natural environment caused by open-air piling of fluidized bed boiler ash or residues are reduced, and the cost of the self-leveling material is reduced; and the prepared cement-based self-leveling material has the characteristics of high strength, high flowability, low contraction distortion and the like.

Description

technical field [0001] The invention belongs to building materials and relates to a sulfur-fixed ash cement-based self-leveling material. It is especially suitable as a self-leveling material for construction. Background technique [0002] Sulfur-fixing ash or sulfur-fixing slag (that is, fluidized bed sulfur-fixing ash) refers to sulfur-containing coal mixed with a sulfur-fixing agent (usually limestone) in a certain proportion and then passed through 850 to 900 hours in a circulating fluidized bed (CFB) boiler. ℃ The fly ash collected in the flue and the slag discharged from the bottom of the furnace after burning sulfur. Fluidized bed sulfur-fixing ash is a kind of coal-fired ash with special properties. Compared with common fly ash or slag, because the coal combustion does not reach the temperature of forming a liquid phase, a large amount of desulfurizer is added during the combustion process, resulting in The sulfur-fixed ash produced by it is very different from ord...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/06C04B28/08C04B18/08C04B18/10
CPCY02W30/91
Inventor 卢忠远徐迅范晓玲
Owner SOUTHWEAT UNIV OF SCI & TECH
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