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Inorganic cementing material and preparation method thereof

An inorganic cementitious material and cementitious material technology, applied in the field of building materials, can solve the problems of less fly ash consumption, high fly ash quality requirements, poor product performance, etc., achieve less greenhouse gas emissions and improve production Benefits and equipment use efficiency, good applicability

Inactive Publication Date: 2016-10-05
HUAZHI ENERGY CONSERVATION HK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology of using fly ash to prepare inorganic cementitious materials has the problems of small amount of fly ash, high requirements on the quality of fly ash and poor product performance.

Method used

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  • Inorganic cementing material and preparation method thereof
  • Inorganic cementing material and preparation method thereof
  • Inorganic cementing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The batch contains the following ingredients in parts by mass:

[0026] 80 parts of fly ash

[0027] Quicklime calculated as CaO 20 parts

[0028] Sodium hydroxide 0.5 parts

[0029] Weigh fly ash, quicklime, and sodium hydroxide according to the above mass ratio, and grind them together until the fineness is 45 μm and the sieve residue is 5.2% of the batching material; pour the batching material into the mixer, add 35 parts of water, stir for 3 minutes, and age After melting for 2 hours, use a ball forming disc to form pellets with a diameter of 8 to 16mm; steam the pellets in a steam curing box at 90°C for 10 hours to obtain steamed feed, and use a small kiln to calcinate the steamed feed at 750°C for 90 minutes and then blow it to cool. Synthetic material: Take 70 parts of synthetic material, 20 parts of Portland cement and 10 parts of anhydrite and grind together until the specific surface area is 350m 2 / kg to prepare a fast-setting high-strength inorganic gelli...

Embodiment 2

[0031] The batch contains the following ingredients in parts by mass:

[0032] 70 parts of fly ash

[0033] Quicklime calculated as CaO 30 parts

[0034] Sodium hydroxide 1.0 parts

[0035] Weigh fly ash, quicklime, and sodium hydroxide according to the above mass ratio, and grind them together until the fineness is 45 μm and the sieve residue is 5.8% of the batching material; pour the batching material into the mixer, add 45 parts of water, stir for 2 minutes, and age After melting for 2.5 hours, use a ball forming disc to form pellets with a diameter of 8-16mm; steam the pellets in a steam curing box at 95°C for 8 hours to obtain steamed feed, and then calcine the steamed feed in a small kiln at 800°C for 60 minutes and then blow it to cool Obtain synthetic material; take 68 parts of synthetic material, 25 parts of Portland cement and 7 parts of dihydrate gypsum to grind together until the specific surface area is 415m 2 / kg to prepare a fast-setting high-strength inorgan...

Embodiment 3

[0037] The batch contains the following ingredients in parts by mass:

[0038] 75 parts of fly ash

[0039] Quicklime calculated as CaO 25 parts

[0040] Sodium carbonate 1.4 parts

[0041] Weigh fly ash, quicklime, and sodium carbonate according to the above mass ratio, and grind them together until the fineness is 45 μm, and the sieve residue is 9.8%; pour the batch into the mixer, add 40 parts of water, stir for 3 minutes, and age After 3 hours, it is extruded into a material block of 240mm×115mm×53mm, and the material block is steamed in a steam curing box at 90°C for 16 hours to obtain the steamed nutrient, and the steamed nutrient is calcined in a small kiln at 750°C for 75 minutes, and then naturally cooled in the air to synthesize Materials; use a crusher to break the synthetic material into particles smaller than 16mm, take 67 parts of synthetic material, 25 parts of Portland cement and 8 parts of hemihydrate gypsum and grind together until the specific surface area...

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Abstract

The invention provides an inorganic cementing material and a preparation method thereof. The cementing material is obtained by jointly grinding a composite material obtained by steam curing and calcinating material blocks or material balls prepared from coal ash, lime, an exciting agent and water, Portland cement and gypsum. The preparation method includes the steps that by mass, 65-80 parts of coal ash, 20-35 parts of effective CaO of lime and 0.5-2.0 parts of exciting agent are jointly ground into a batch mixture with the degree of fineness being 45 microns and the residue on sieve being smaller than 10%, 15-50 parts of water is added, the mixture is mixed to be uniform, then aging is conducted for 2-3 hours, the material blocks or the material balls are subjected to steam curing for 8-16 hours at the temperature of 90-98 DEG C after being formed, and a steam cured material is obtained; the steam cured material is calcinated for 15-90 minutes at the temperature of 750-1,000 DEG C and then air cooled or cooled in air, and the composite material is obtained; 60-70 parts of the composite material, 20-30 parts of Portland cement and 5-10 parts of gypsum are jointly ground till the specific area is 350-450 m<2> / kg, and the fast-setting high-strength inorganic cementing material is prepared.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a fast-setting high-strength inorganic cementitious material using fly ash, lime and a small amount of Portland cement or cement clinker as main raw materials and a preparation method thereof. Background technique [0002] Cement is a cementitious material used in civil engineering, water conservancy and transportation construction projects. The problems of high resource and energy consumption and high greenhouse gas emissions in the production process have increasingly attracted people's attention. Material workers have been committed to seeking new raw material resources. And alternative or as supplementary new gelling material preparation method. At the same time, with the continuous expansion of construction and development areas and fields, construction projects in special natural environments also put forward different new requirements for the perform...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B11/28
CPCC04B7/26Y02P40/10
Inventor 方永浩龚泳帆朱晨辉
Owner HUAZHI ENERGY CONSERVATION HK
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