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B05-grade autoclaved aerated concrete block and preparation method thereof

A concrete block and autoclaved aeration technology, applied in ceramic products, other household appliances, applications, etc., can solve the problems of uneven pore size and pore wall, low block strength, easy cracking, etc., to reduce contact Surface area, raw material saving, high porosity effect

Inactive Publication Date: 2018-07-20
SICHUAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: how to solve the problems of uneven pore size and pore wall inside the autoclaved aerated concrete block, low block strength and easy cracking, and obtain light weight and high strength through simple raw material formula and production process B05 grade autoclaved aerated concrete block

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Block raw material composition and ratio design: the weight ratio of fly ash is 77%, the weight ratio of lime is 13.5%, the weight ratio of cement is 6%, the weight ratio of gypsum is 2.2%, and the weight ratio of aluminum powder is 0.06 %; The ratio of water to material is 0.63, and the fly ash is the fly ash discharged from the production of a fluidized bed boiler in a thermal energy workshop of a company. The composition is as follows: C content is 16.95%, SO 3 Content is 2.53%, SiO 2 The content is 44.65%, Al 2 o 3 The content is 20.22%, Fe 2 o 3 content of 8.6%, CaO content of 3.42%, TiO 2 content of 1.77, MgO content of 0.63%, K 2 O content is 0.51%, Na 2 The O content is 0.38%, and the rest is 0.34%. Raw material pretreatment: the two raw materials, fly ash and lime, are subjected to ball milling and refining treatment respectively. After the ball milling, the powder is sieved to screen out the powder with a particle size below 0.35 microns. , at the same ...

Embodiment 2

[0028] Block raw material composition and ratio design: the weight ratio of fly ash is 78%, the weight ratio of lime is 14.5%, the weight ratio of cement is 7%, the weight ratio of gypsum is 2.2%, and the weight ratio of aluminum powder is 0.062 %; The ratio of water to material is 0.63, and the fly ash is the fly ash discharged from the production of a fluidized bed boiler in a thermal energy workshop of a company. The composition is as follows: C content is 16.95%, SO 3 Content is 2.53%, SiO 2 The content is 44.65%, Al 2 o 3 The content is 20.22%, Fe 2 o 3 content of 8.6%, CaO content of 3.42%, TiO 2 content of 1.77, MgO content of 0.63%, K 2 O content is 0.51%, Na 2 The O content is 0.38%, and the rest is 0.34%. Raw material pretreatment: the two raw materials, fly ash and lime, are subjected to ball milling and refining treatment respectively. After the ball milling, the powder is sieved to screen out the powder with a particle size below 0.35 microns. , at the same...

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Abstract

The invention discloses a B05-grade autoclaved aerated concrete block and a preparation method thereof. The B05-grade autoclaved aerated concrete block comprises the following raw materials in percentby weight: 77-78% of fly ash, 13.5-14.5% of lime, 6-7% of cement, 2-2.5% of gypsum and 0.061-0.065% of silicon dioxide-coated aluminum powder. A gas-forming agent, namely aluminum powder, is pretreated by a coating method so as to cover a part of the surface thereof with a film layer, so that the contact surface area between the aluminum powder and a slurry is reduced, and thus the stirring timeof the aluminum powder in the slurry is prolonged; after a longer stirring time, the aluminum powder is dispersed in the slurry as uniformly as possible, so that the finally formed aerated concrete block is guaranteed to have relatively high porosity and a uniform porous structure and thus light weight and high strength are achieved.

Description

technical field [0001] The invention belongs to the technical field of recovery and reuse of industrial solid waste, and in particular relates to a method for preparing high-strength B05 grade autoclaved aerated concrete blocks by using fly ash. Background technique [0002] Fly ash is the fine ash collected from the flue gas after coal combustion, and is the main solid waste discharged from coal-fired power plants. With the development of the power industry, the discharge of fly ash from coal-fired power plants is increasing year by year. At present, the annual emission of fly ash in my country is about 600 million tons. Fly ash is one of the largest industrial wastes in my country. Fly ash not only pollutes the environment, but also causes harm to human body and organisms due to the toxic chemicals contained in it. Therefore, the recovery and reuse of fly ash has become an important measure to solve the problem of solid waste pollution and build an ecological civilizatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B38/02C04B20/10
CPCC04B20/1066C04B28/02C04B2201/50C04B22/143C04B18/08C04B22/064C04B22/04C04B38/02
Inventor 鲜广赵海波张勇唐敬友李帅梁红樱
Owner SICHUAN UNIV
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