Method for producing aerated concrete blocks by lime wet pulping

An air-entrained concrete and wet process technology, applied in chemical instruments and methods, manufacturing tools, ceramic products, etc., can solve problems such as high environmental protection requirements, reduction of tobomullite structure formation rate, active calcium oxide damage, etc. Achieve the effect of improving pouring stability, shortening thickening time and increasing thickening speed

Inactive Publication Date: 2020-08-07
宜昌益通鹏程新型墙体材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effects of the above methods are not ideal, and there are disadvantages. The introduction of phosphogypsum causes secondary pollution of the block, and reduces the generation rate of the tobermuleite structure (the main strength structure of the block) during the autoclaving stage, and damages the block. mechanical structure
In addition, dry grinding of lime has high environmental protection requirements for equipment, and it is easy to cause dust pollution. Activated calcium oxide has certain damage to the human body. In summary, the traditional production process needs to be improved urgently from the perspective of products and environmental protection.

Method used

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  • Method for producing aerated concrete blocks by lime wet pulping
  • Method for producing aerated concrete blocks by lime wet pulping
  • Method for producing aerated concrete blocks by lime wet pulping

Examples

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Embodiment 1

[0032] A method for lime wet pulping to produce aerated concrete blocks. Quartz sand and quicklime are added to a ball mill and mixed with water for wet grinding (mass ratio, sand:lime:water=5:1.2:3.8) to make slurry, and quicklime is used to It is water-soluble and exothermic when it encounters water, making a uniform and stable thermal slurry. The refining process is controlled by four indicators of available calcium in the slurry (mass fraction = 9%), fineness (0.088mm standard sieve: 26%), temperature (normally 39°C), and concentration (63%).

[0033]When producing and pouring, pump the ground slurry into the batching mixer according to the batching requirements, then add 1.2 parts of ordinary Portland cement, and stir for 3.5 minutes. After stirring evenly, add 0.003 parts of aluminum powder and 0.005 parts of polycarboxylate superplasticizer part (sulfamate formaldehyde condensate), 0.006 part of bubble stabilizer (the bubble stabilizer described is oleic acid C 18:1 , ...

Embodiment 2

[0037] A method for lime wet pulping to produce aerated concrete blocks. Quartz sand and quicklime are added to a ball mill and mixed with water for wet grinding (mass ratio, sand:lime:water=5:1:4) to make slurry, and quicklime is used to It is water-soluble and exothermic when it encounters water, making a uniform and stable thermal slurry. The refining process is controlled by four indicators of available calcium in the slurry (mass fraction = 13%), fineness (0.088mm standard sieve: 28%), temperature (normally 40°C), and concentration (64%).

[0038] When producing and pouring, pump the ground slurry into the batching mixer according to the batching requirements, then add 1.0 parts of ordinary Portland cement, and stir for 3.5 minutes. After stirring evenly, add 0.002 parts of aluminum powder and 0.004 parts of polycarboxylate superplasticizer part (melamine formaldehyde condensation polymer), 0.005 part of bubble stabilizer (the bubble stabilizer described is oleic acid C ...

Embodiment 3

[0042] A method for lime wet pulping to produce aerated concrete blocks. Quartz sand and quicklime are added to a ball mill and mixed with water for wet grinding (mass ratio, sand:lime:water=5:0.8:4.2) to make slurry, and quicklime is used The properties of hydrophilicity and water exotherm make a uniform and stable thermal slurry 4. The refining process is controlled by four indicators of available calcium in the slurry (mass fraction = 8%), fineness (0.088mm standard sieve: 30%), temperature (38°C under normal conditions), and concentration (62%).

[0043] When producing and pouring, pump the ground slurry into the batching mixer according to the batching requirements, then add 1.0 parts of ordinary Portland cement, and stir for 3.5 minutes. After stirring evenly, add 0.003 parts of aluminum powder and 0.0045 parts of polycarboxylate superplasticizer part (acetone sulfonate formaldehyde condensate), 0.007 part of bubble stabilizer (the bubble stabilizer described is oleic ac...

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Abstract

The invention provides a method for producing aerated concrete blocks by lime wet pulping. The method comprises the following steps of adding quartz sand and quicklime into a ball mill, adding water,mixing, and carrying out ball milling to prepare slurry at 38-40 DEG C; pumping slurry into a burdening stirrer, adding Portland cement, uniformly stirring, adding aluminum powder, a polycarboxylate superplasticizer and an oxidized paraffin soap bubble stabilizer, uniformly stirring and mixing components, discharging the slurry into a mold, and carrying out injection molding; and after injection molding, feeding the mixture and the mold into a constant-temperature chamber together, and obtaining the concrete block after gas generation, thickening and hardening. By adopting the method, in the thickening stage after gas generation is completed, the uniformly distributed calcium hydrate system reduces the existence of intermediate water and increases adsorbed water, so that the slurry thickening speed is increased, the pouring stability is improved, the thickening time is shortened, and the production efficiency is improved.

Description

technical field [0001] The invention provides a method for concrete blocks, in particular to a method for producing aerated concrete blocks by lime wet slurrying. Background technique [0002] As a building material, aerated concrete blocks are widely used in modern buildings. They have the advantages of light weight, heat insulation, and sound insulation. They are used as filling materials for building envelopes, and their mechanical properties are low (the highest compressive strength is only about 5MPa). , poor durability such as frost resistance and shrinkage resistance. Modern buildings have higher and higher requirements for the durability of building materials. Research and development of a higher performance aerated concrete block has become a demand for the development of wall materials. The "Passivhaus" that has emerged in recent years - a new type of house that is insulated, sealed, environmentally friendly, and durable for hundreds of years" has continuously imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B28C1/18B28C5/00B28B13/02B28B11/24C04B28/10C04B38/02
CPCB28B11/245B28B13/02B28C1/18B28C5/003C04B28/10C04B2201/20C04B2201/50C04B14/06C04B7/02C04B22/04C04B2103/302C04B2103/48C04B38/02
Inventor 周宜吴玉成胡俊靳明照王红兴贺祥鹏
Owner 宜昌益通鹏程新型墙体材料有限公司
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