Aerated concrete block and preparing method thereof

A technology of aerated concrete and blocks, which is applied in the field of building materials, can solve the problems of low strength, reduce the qualified rate of finished products, increase the production cost of enterprises, etc., achieve low shrinkage value, increase tensile strength, and prevent cracks

Inactive Publication Date: 2016-07-06
欧士玺
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing aerated concrete blocks have defects in the ratio and manufacturing process: in the process of raw material processing and manufacturing, if the particle size of quicklime is not uniform, or the ratio of cement and lime is not suitable, it will cause the finished product The strength of the middle part of the body is not high, and cracks will appear during the process of exiting the kettle, clamping the billet, and cutting; The heat and expansion of the pulp is too fast in the early stage, the thickening and hardening ability of the blank body is insufficient in the later stage, and the plasticity of the blank body is poor. During the process of flipping and demolding in the air, cracks in the middle of the blank body are prone to appear, and the blank body is forced to be scrapped and pushed into the cutting pit. Middle; in the process of turning over and removing the bottom material, due t

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example one

[0028] The ratio of cement-lime-fly ash aerated concrete block is: lime 18 parts, cement 12 parts, fly ash 65 parts, gypsum 4 parts, waste slurry 5 parts, polypropylene fiber 0.5 parts, of which aluminum powder is The dosage is calculated according to the following formula

[0029] Aluminium powder consumption per unit product (g / m 3 ) = Volume of pores formed after the aluminum powder gasses / (Theoretical gas production of aluminum at pouring temperature (l / g) * active aluminum content). The factory generally selects on the basis of practice. In this example, aluminum powder paste is used, and the aerated concrete produced is 600kg / m 3 As a standard, the addition amount of aluminum powder paste is 80% of all dry materials, so the addition amount of aluminum powder paste in this embodiment is 0.083 parts. The water-to-material ratio of aerated concrete blocks, that is, the ratio of the total water content to the total weight of the dry materials is 0.60.

[0030...

Example Embodiment

[0031] Example two

[0032] The ratio of cement-lime-fly ash aerated concrete block is: 20 parts lime, 15 parts cement, 68 parts fly ash, 1 part gypsum, 4 parts waste slurry, 0.8 parts polypropylene fiber, and aluminum powder paste addition The amount is 0.087 parts. The water-to-material ratio of aerated concrete blocks, that is, the ratio of total water content to the total weight of dry materials is 0.63.

[0033] The strength grade of the prepared aerated concrete block is A5.0, the dry density grade is B05, the superior product (A), and the size is 600mm×200mm×250mm.

Example Embodiment

[0034] Example three

[0035] The proportion of cement-lime-fly ash aerated concrete block is: 25 parts lime, 6 parts cement, 70 parts fly ash, 5 parts gypsum, 5 parts waste slurry, 1 part polypropylene fiber, and aluminum powder paste addition The amount is 0.090 parts. The water-to-material ratio of aerated concrete blocks, that is, the ratio of the total water content to the total weight of the dry materials is 0.65.

[0036] The strength grade of the prepared aerated concrete block is A5.0, the dry density grade is B05, the superior product (A), and the size is 600mm×200mm×250mm.

[0037] The method of manufacturing the aerated concrete block in the above three embodiments is: according to the proportion of sand and gypsum, water is added to grind the original slurry, lime, cement, waste slurry and polypropylene fiber are added in sequence, and stirred for 2-4 minutes ; Add the aluminum powder liquid to continue stirring, enter the steam to preheat, adjust the pouring temperatu...

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PUM

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Abstract

The present invention relates to an air-entrained concrete block and its manufacturing method, comprising cement, lime, polypropylene fiber and other components including one of fly ash, sand, gypsum, aluminum powder and waste slurry species or several. By optimizing the ingredients and process parameters of air-entrained concrete, the obtained air-entrained concrete blocks have the advantages of high strength, low shrinkage and crack prevention. At the same time, modified polypropylene fibers can improve the tensile strength of concrete structural materials, Impact strength, reduce the drying shrinkage value of concrete structural materials and prevent the formation and expansion of cracks during cement curing.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an aerated concrete block and a manufacturing method thereof. Background technique [0002] Air-entrained concrete blocks are made of siliceous materials and calcareous materials as the main raw materials, mixed with air-generating agent, stirred with water, formed pores by chemical reaction, and made through pouring molding, pre-curing cutting, autoclaving curing and other processes porous silicate products. Aerated concrete blocks have the following advantages: light weight, good thermal insulation performance, good fire resistance and no harmful gas emission, machinability, wide source of raw materials, high production efficiency, low production energy consumption, and meet the requirements of low-carbon economy Compared with clay solid bricks, every 10,000 cubic meters of production capacity can reduce burning bricks and destroying fields by 2.5 acres, reducing fl...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/12
CPCC04B28/12C04B2201/20C04B2201/50
Inventor 欧士玺
Owner 欧士玺
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