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Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof

A technology of concrete blocks and autoclaved air filling, which is applied in the field of building wall materials, can solve the problems of poor thermal insulation performance, rare self-insulating blocks, and high dry density of blocks, and achieves small heat transfer resistance and high raw material Sufficient sources and good thermal insulation performance

Active Publication Date: 2014-03-26
HENAN XIAN NEW BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, self-insulating blocks that meet the requirements of air-entrained concrete bulk density, strength and thermal conductivity at the same time are still rare in the domestic market.
[0003] The invention patent with the application number CN201010247050.1 titled "Fly ash aerated concrete block and its preparation method" discloses an autoclaved fly ash aerated concrete block Air concrete block and its preparation method. The dry bulk density of the block that can be prepared by using fly ash is 500~700 kg / m3. The dry density of the block is relatively large, and the thermal insulation The performance is poor; during the preparation process, the invention controls the temperature of the fly ash slurry at 43~46°C, and it is difficult to control the temperature of the slurry at 43~46°C after adding quicklime, because the quicklime will meet with water React quickly and emit a large amount of heat, so the formula and production process of the above invention need to be improved

Method used

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  • Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof
  • Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof
  • Self-heat-insulating fly ash autoclaved aerated concrete block and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] A self-insulating fly ash autoclaved aerated concrete block, the concrete block includes the following components by weight ratio: 1400 kg of fly ash, 330 kg of cement, 390 kg of quicklime, 100 kg of slaked lime, and 50 kg of desulfurized gypsum kg, block waste 255 kg, aluminum powder paste 2.90 kg, acacia powder 0.50 kg. The loss on ignition of the fly ash is not more than 8%, and the sieve residue of the square hole sieve with a fineness (45 μm) is less than 20%. The block waste is leftovers produced during the cutting of autoclaved aerated concrete blocks. The aluminum powder paste is a water-based aluminum powder paste.

[0031] The preparation method of the above-mentioned self-insulating fly ash autoclaved aerated concrete block comprises the following steps:

[0032] 1) After the quicklime is crushed with a jaw crusher, it is ground with a ball mill until the fineness is 0.08 mm and the sieve with a square hole does not exceed 10% of the powder;

[0033] 2) Mi...

Embodiment 2

[0040] A self-insulating fly ash autoclaved aerated concrete block, the concrete block includes the following weight ratio components: 1710 kg of fly ash, 370 kg of cement, 405 kg of quicklime, 150 kg of slaked lime, and 50 kg of desulfurized gypsum , block waste 270 kg, aluminum powder paste 2.75 kg, tea saponin 0.45 kg. The loss on ignition of the fly ash is not more than 8%, and the sieve residue of the square hole sieve with a fineness (45 μm) is less than 20%. The block waste is leftovers produced during the cutting of autoclaved aerated concrete blocks. The aluminum powder paste is a water-based aluminum powder paste.

[0041] The preparation method of the above-mentioned self-insulating fly ash autoclaved aerated concrete block comprises the following steps:

[0042] 1) After the quicklime is crushed with a jaw crusher, it is ground with a ball mill until the fineness is 0.08 mm and the sieve with a square hole does not exceed 10% of the powder;

[0043] 2) Mix fly a...

Embodiment 3

[0050] A self-insulating fly ash autoclaved aerated concrete block, the concrete block includes the following weight ratio components: 1890 kg of fly ash, 380 kg of cement, 455 kg of quicklime, 175 kg of slaked lime, and 65 kg of desulfurized gypsum , block waste 310 kg, aluminum powder paste 2.40 kg, pull apart powder 0.35 kg. The loss on ignition of the fly ash is not more than 8%, and the sieve residue of the square hole sieve with a fineness (45 μm) is less than 20%. The block waste is leftovers produced during the cutting of autoclaved aerated concrete blocks. The aluminum powder paste is a water-based aluminum powder paste.

[0051] The preparation method of the above-mentioned self-insulating fly ash autoclaved aerated concrete block comprises the following steps:

[0052] 1) After the quicklime is crushed with a jaw crusher, it is ground with a ball mill until the fineness is 0.08 mm and the sieve with a square hole does not exceed 10% of the powder;

[0053] 2) Mix...

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Abstract

The invention relates to a self-heat-insulating fly ash autoclaved aerated concrete block which comprises the following components in parts by weight: 1400-2200kg of fly ash, 330-400kg of cement, 390-550kg of quicklime, 100-200kg of white lime, 50-100kg of desulfurized gypsum, 255-420kg of block waste, 2.15-2.90kg of aluminum powder paste and 0.20-0.50kg of foam stabilizer. According to the invention, the fly ash, desulfurized gypsum and excessive cut waste from a power plant are fully utilized, and meanwhile, the Level B04, Level B05, Level B06 and Level B07 self-heat-insulating fly ash aerated concrete blocks can be prepared. The block products contain a large amount of micro and macro pores, and are uniform in pore size, low in heat conductivity coefficient and favorable in self-heat-insulating property.

Description

technical field [0001] The invention belongs to the technical field of building wall materials, in particular to a self-insulating fly ash autoclaved aerated concrete block and a preparation method thereof. Background technique [0002] my country's current heating energy consumption per unit building area is equivalent to 3 to 4 times that of developed countries with similar climates. With the intensification of the energy crisis, rational use of energy and improvement of energy utilization are the fundamental plans for my country's social development. my country's building energy conservation has been listed as a programmatic document and a rigid building index, the core of which is to reform the building maintenance structure and heating system, among which wall construction technology is playing an increasingly important role in building energy conservation, and the wall Renewal of thermal insulation materials is of great significance to building energy conservation. In ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/10C04B18/08
CPCY02W30/91
Inventor 司政凯邓小成董恒瑞荣爱琴曹林方王安会
Owner HENAN XIAN NEW BUILDING MATERIALS
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