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Aerated concrete block and preparation method thereof

A technology for aerated concrete and blocks, applied in ceramic products, climate sustainability, other household appliances, etc., can solve problems such as energy waste and environmental threats, reduce emissions, improve stability and reliability, and improve The effect of practical application value and promotion value

Active Publication Date: 2015-06-24
太原钢铁(集团)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is still a large amount of fly ash that needs to be discharged and disposed of every year, which poses a huge threat to the environment around the city and is also a huge waste of energy. There is an urgent need for a production technology with a high content of fly ash.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: the preparation method of aerated concrete block

[0055] Concrete preparation method comprises the following steps:

[0056] (1) Raw material processing

[0057] ①Fly ash fineness: 33.5%, fly ash loss on ignition: 5.3%,

[0058] Fly ash fineness refers to the proportion of fly ash left on the sieve to the total fly ash after passing through a 0.045mm square hole sieve;

[0059] The loss on ignition of fly ash refers to the weight percentage lost after the fly ash burns at 1000-1100°C;

[0060] ②Technical indicators of quicklime: Active CaO accounts for 58% of the total mass of quicklime; digestion speed: 20min; digestion temperature: 56°C; quicklime fineness: 13%,

[0061] Digestion refers to the process of reaction between quicklime and water. When measuring the digestion speed and temperature, let 10g of quicklime react with 20mL of water, and record the time and corresponding temperature every 30s. The time taken for the temperature to rise to the h...

Embodiment 2

[0086] The present embodiment preparation method is the same as embodiment 1, and process parameter is as follows:

[0087] Fly ash: fineness: 32.5%, loss on ignition: 3.6%

[0088] Quicklime: active CaO content: 56.3%, digestion speed: 18min, digestion temperature: 53°C, fineness: 10.8%;

[0089] Pulping moisture content: 37.6%, pulping diffusion: 21cm;

[0090] Pouring temperature: 48°C.

[0091] The raw material ratio that present embodiment adopts is as follows:

[0092] Fly ash: 2025kg

[0093] Quicklime: 540kg

[0094] Cement: 54kg

[0095] Desulfurization gypsum: 81kg

[0096] Aluminum powder: 27kg

[0097] The resulting finished product has a compressive strength of 4.5MPa and a dry density of 620kg / m 3 , in full compliance with the requirements of the national standard B06 A3.5 grade qualified products.

Embodiment 3

[0099] The present embodiment preparation method is the same as embodiment 1, and process parameter is as follows:

[0100] Fly ash: fineness: 34.7%, loss on ignition: 3.8%

[0101] Quicklime: active CaO content: 61.5%, digestion speed: 22min, digestion temperature: 58°C, fineness: 12.1%;

[0102] Pulping moisture content: 38.2%, pulping diffusion: 21cm;

[0103] Pouring temperature: 48°C.

[0104] The raw material ratio that present embodiment adopts is as follows:

[0105] Fly ash: 2079kg

[0106] Quicklime: 513kg

[0107] Cement: 46kg

[0108] Desulfurization gypsum: 62kg

[0109] Aluminum powder: 25kg

[0110] The resulting finished product has a compressive strength of 4.1MPa and a dry density of 613kg / m 3 , in full compliance with the requirements of the national standard B06 A3.5 grade qualified products.

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Abstract

The invention relates to an aerated concrete block and a preparation method thereof, belonging to the technical fields of comprehensive metallurgy solid waste resource utilization and novel energy-saving construction material industries. In order to treat and utilize coal ash to the maximum limit, the coal ash addition amount in raw material proportion is increased, the coal ash addition ratio is increased to be 75-80% from 70-72%, various technique parameters are matched and adjusted, the raw material machining process is improved, the aerated concrete block is prepared from the following raw materials in percentage by mass: 75-80% of coal ash, 15-20% of quick lime, 1-2% of cement, 2.0-3.0% of desulfurization gypsum and 0.8-1.0% of Al powder through processes of machining raw materials, blending the raw materials, stirring, casting, standing, demolding, cutting, steaming and compressing, and maintaining. The production and operation cost of comprehensive coal ash utilization enterprises is lowered, the disordered pouring and discharge amount of the coal ash is reduced, and the risk that the environment is polluted by the coal ash is reduced.

Description

technical field [0001] The invention relates to an aerated concrete block and a preparation method thereof, and belongs to the technical field of comprehensive utilization technology of metallurgical solid waste resources and the industry of new energy-saving building materials. Background technique [0002] China's development of new wall materials (fly ash aerated concrete blocks, fly ash autoclaved standard bricks) to replace solid clay bricks has important social and economic benefits such as protecting cultivated land, saving energy, utilizing waste residues, controlling environmental pollution, and improving building functions. benefit. At present, there are 120,000 brick and tile enterprises in the country, with an annual production capacity of more than 600 billion standard bricks and 1.43 billion cubic meters of soil, which is equivalent to destroying 1.2 million mu of land; its production energy consumption is about 60 million tons of standard coal per year. Every ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/02C04B28/14C04B18/08
CPCY02W30/91
Inventor 胡荣建
Owner 太原钢铁(集团)有限公司
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