Aerated concrete building block and preparation method thereof

An air-entrained concrete and block technology, applied in the field of building materials, can solve the problems of low activity of fly ash, increased consumption of heavy aggregates such as cement, unsuitable particle size, etc., so as to save farmland resources and protect the ecological environment. Effect

Inactive Publication Date: 2010-09-29
GAOMI FURI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when fly ash is used in the manufacture of air-entrained concrete blocks in the prior art, in order to achieve the required compressive strength of concrete blocks, the amount of fly ash is generally low, which leads to the consumption of heavy aggregates such as cement. Increase, this will inevit

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) 493kg of boiler slag and 74kg of phosphogypsum are fully mixed, stored for one day, fully homogenized, and then transported into a mill and added with water for grinding to prepare a mixed slurry with a diffusion degree of 28cm and a sieve residue of 45wt% (wherein the fineness measurement is 0.08mm sieve), add water to 1080kg of fly ash (dry ash) and scrap waste slurry after cutting to prepare pulverized coal with a diffusion degree of 28cm (screened with a 0.08mm sieve, and the sieve residue is about 8wt%) Mortar, the lime is crushed by a jaw crusher and ground with a mill (screened with a 0.08mm sieve, the sieve residue is 8wt%), and the mixed slurry and the fly ash slurry are added to the pouring machine and mixed for 1 minute. Then add 350kg of ground quicklime and 25kg of cement in sequence, add air and stir to make the temperature of the slurry in the pouring machine reach 45°C within 100 seconds after the cement is placed, then stop adding air, and stir for a...

Embodiment 2

[0026] (1) 616kg of boiler slag and 110kg of phosphogypsum are fully mixed, stored for one day, fully homogenized, and then transported into a mill and added with water for grinding to prepare a mixed slurry with a diffusion degree of 28cm and a sieve residue of 45wt% (wherein the fineness measurement is 0.08mm sieve), add water to 1360kg of fly ash (dry ash) and scrap waste slurry after cutting to prepare pulverized coal with a diffusion degree of 28cm (screened with a 0.08mm sieve, and the sieve residue is about 8wt%) Mortar, the lime is crushed by a jaw crusher and ground with a mill (screened with a 0.08mm sieve, the sieve residue is 8wt%), and the mixed slurry and the fly ash slurry are added to the pouring machine and mixed for 1 minute. Then add 515kg of ground quicklime and 50kg of cement in sequence, add air and stir to make the temperature of the slurry in the pouring machine reach 44°C within 100 seconds after the cement is placed, then stop adding air, and stir for ...

Embodiment 3

[0031] (1) 740kg of boiler slag and 148kg of phosphogypsum are fully mixed, stored for one day, fully homogenized, then transported into a mill and added with water for grinding, and prepared into a mixed slurry with a diffusion degree of 28cm and a sieve residue of 45wt% (wherein the fineness measurement is 0.08mm sieve), add water to 1450kg of fly ash (dry ash) and scrap waste slurry after cutting to prepare pulverized coal with a diffusion degree of 28cm (screened with a 0.08mm sieve, and the sieve residue is about 8wt%) Mortar, the lime is crushed by a jaw crusher and ground with a mill (screened with a 0.08mm sieve, the sieve residue is 8wt%), and the mixed slurry and the fly ash slurry are added to the pouring machine and mixed for 1 minute. Then add 520kg of ground quicklime and 75kg of cement in sequence, add air and stir to make the temperature of the slurry in the pouring machine reach 43°C within 100 seconds after the cement is placed, then stop adding air, and stir ...

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PUM

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Abstract

The invention discloses an aerated concrete building block which is prepared from the following raw materials in parts by weight: 45 to 55 parts of fly ash, 20 to 30 parts of boiler slag, 3 to 6 parts of phosphogypsum, 17 to 19 parts of quicklime, 1 to 3 parts of cement and 0.07 to 0.085 part of aluminium powder. The preparation method of the aerated concrete building block comprises the following steps of: (1) after mixing the raw materials of the boiler slag and the phosphogypsum fully, adding water, grinding, preparing mixed slurry, adding the water into the fly ash, preparing fly ash slurry, mixing the mixed slurry, the fly ash slurry, the quicklime, the cement and the aluminium powder fully and evenly and preparing a mixed material; (2) pouring the mixed material obtained in the step (1), molding and cutting into a building block blank after precuring at the temperature of 30 to 35 DEG C for 1.5 to 2.5 hours; and (3) steaming and curing the building block blank to obtain the aerated concrete building block.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an aerated concrete block and a preparation method thereof. Background technique [0002] At present, the wall materials for construction mainly include clay solid bricks and hollow bricks, and concrete blocks with fly ash as the main raw material, among which clay bricks are the leading products. However, due to the large consumption of clay in the manufacture of clay bricks, the damage to farmland and the ecological environment is relatively large. In order to save farmland resources and strengthen the comprehensive utilization of solid waste, lightweight aerated concrete blocks with fly ash as the main raw material are gradually into the construction market. At the same time, in view of the current tense situation of land resources in the city, multi-storey buildings in the city are gradually replaced by high-rise buildings, which requires building materials to hav...

Claims

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Application Information

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IPC IPC(8): E04C1/00C04B38/02C04B28/14C04B18/10C04B18/08
CPCC04B2111/00017C04B2111/40C04B28/18Y02W30/91C04B7/00C04B18/067C04B18/08C04B20/026C04B22/04C04B22/144C04B40/0028C04B40/0245
Inventor 徐义德宋立梅刘大伟
Owner GAOMI FURI BUILDING MATERIALS
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