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A kind of inorganic cementitious material resistant to water and sulfate erosion and preparation method thereof

An inorganic gelling material and gelling material technology, applied in the field of building materials, can solve problems such as poor product performance, high fly ash quality requirements, and less fly ash consumption, so as to improve gelling properties and increase production efficiency and equipment efficiency, the effect of increasing content

Inactive Publication Date: 2019-03-01
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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  • A kind of inorganic cementitious material resistant to water and sulfate erosion and preparation method thereof
  • A kind of inorganic cementitious material resistant to water and sulfate erosion and preparation method thereof
  • A kind of inorganic cementitious material resistant to water and sulfate erosion 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 45 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 16 mm; steam the pellets in a steam curing box at 90°C for 10 hours to obtain steamed feed, calcinate the steamed feed in a small kiln at 750°C for 120 minutes, and then blow it to cool. Clinker: take 90 parts of clinker and 10 parts of anhydrous gypsum to grind together until the specific surface area is 350m 2 / kg to prepare an inorganic gelling material.

Embodiment 2

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

[0032] 75 parts of fly ash

[0033] Quicklime calculated as CaO 25 parts

[0034] Sodium carbonate 1.4 parts

[0035] 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 a mixer, add 48 parts of water, stir for 3 minutes, and age After 3 hours, extrude into a material block of 240mm×115mm×53mm, steam the material block in a steam curing box at 90°C for 16 hours to obtain the steamed nutrient, calcinate the steamed nutrient in a small kiln at 750°C for 90 minutes, and then cool it naturally in the air to get cooked material; use a crusher to crush the clinker into particles smaller than 16mm, take 93 parts of clinker and 7 parts of hemihydrate gypsum to grind together until the specific surface area is 425m 2 / kg to prepare an inorganic gelling material.

Embodiment 3

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

[0038] 70 parts of fly ash

[0039] Quicklime calculated as CaO 30 parts

[0040] Sodium hydroxide 1.0 parts

[0041] 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 50 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 clinker; take 93 parts of clinker and 7 parts of dihydrate gypsum to grind together until the specific surface area is 495m 2 / kg to prepare an inorganic gelling material.

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Abstract

Provided are an inorganic cement material and a manufacturing method thereof, the cement material being manufactured from, in parts by mass, 90-95 parts clinker obtained from steam curing and calcining material blocks or material balls manufactured from 65-80 parts fly ash, 20-35 parts of lime measured in terms of active CaO, 0.5-2 parts stimulating agent, and 15-50 parts water; and 5-10 parts gypsum. The present inorganic cement material uses low-quality fly ash with high carbon content as the main raw material, with a low calcination temperature and low heat consumption.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an inorganic gelling material with fly ash and lime as main raw materials and a preparation method thereof. Background technique [0002] Cement, as the most widely used cementitious material in production and application, is not only a product with high resource consumption and high energy consumption, but also a product with high greenhouse gas emissions and high pollution. Problems such as excessive consumption of renewable resources have long attracted people's attention, and it is urgent to seek new raw material resources and alternative or supplementary new preparation methods. Thermal power generation enterprises discharge a large amount of fly ash every year. Although a large part of the fly ash discharged by the dry method of the power plant has been used in building materials, rubber, agricultural fertilizer industry and civil transportation engin...

Claims

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Application Information

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Patent Type & Authority Patents(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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