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AAC Block Introduction
Time:2012-12-27   Author:  Click:249

A.INTRODUCTION
Autoclaved Aerated Concrete (AAC) Block, also called Light Block, used siliceous (fly ash, sand, slag) and calcareous (lime & cement) as the main raw materials, which through the process of batching, pouring, curing, cutting, autoclaving, separating and packing to make into the final products. It is new type & environmental construction material and widely used for industry and civil building construction. AAC Block is the most mature technology of production and application in the worldwide nowadays.

B.AREATED CONCRETE COMMON CONCEPTION
Common concrete density is usually 1600~2400kg/m3, but AAC Block is around
500kg/m3, 600kg/m3, 700kg/m3. The block surface is smooth, mainly use silicon material (for example: coal ash, sand, stone dust and others), through crushing, mixing raw materials, Mixing calcium material lime cement water to a special slop, then add the
aluminum dust and the additive. Make the aluminum dust and the special slop have a chemical reflect.Then produce Hydrogen to make the concrete slop to expanding or swell foam. Next, put them into curing room to concreting cutting steaming curing, at last, it will become the light brick, the porous rate is 70-80%.

C.ADVANTAGES
1.Light Weight
Aerated concrete density is usually 400-700kg/m3, (according the market in produce),
same as 1/3 of clay brick and 1/5 common concrete. So use the light brick can reduce the weight of the build more, and also reduce the beam of roof and pillar press best. Save the material andcost.
2.Keeping Temperature, Heat Resistant, Fireproof
It has many porous, the delivery hearting coefficient is 0.1~0.20W/ (m·k), same as 1/4 or 1/5 of clay brick, so it is best materials now in the world. Also many kinds raw material, have lowest waste main material: coal ash sand wastes mine material coal stone, stone dust and other silicon materials.
3.High Intensity,Good Sound Insulation & Machinability
4.Conveniently Mechanized Construction

D.Capacity: From 50,000 cubic meters to 450,000 cubic meters per year.
Equipments: stocking raw materials, mixing, molding, forming, cutting, evaporating and
curing, crane cramp, separating, packing, transporting, and etc.
1. Product weight is according to 600kg/m3 (adjustable).
2. Annual capacity 50,000m3 ~ 450,000m3.
3.Raw material proportion: cement 6.5%, lime 23%, fly ash 68%, gypsum 3%,
aluminum paste powder 350g/m3.
4.Water and material rate 0.631
5. One mould product capacity 3.024m3(4.2m mould)
6. Casting slurry cycle time 5~6 minutes, cut cycle time 5 minutes.
7. Casting slurry temperature 38~42 degree
8. Body quiet stop. Time is 1.5~2.5hours, temperature 50~90 degree, after quiet stop body strength is 0.15~0.18Mpa
9. Steam curing cycle time, come in and out autoclave about 0.5hour, steam curing cycle time about is 6 hours/1.6Mpa, 6.5 hours totally


A. Proportion of Cement,Lime,Coal Ash model aerated block raw materials proportion

Name  Unit  Proportion
Cement  % 5-8
Lime  % 18-22
Coal Ash % 62-68
Gypsum  % 2-3
Aluminum % 0.8

B. Proportion of Cement,Lime,Sand model aerated block raw materials proportion:
Name  Unit  Proportion
Cement  % 5-8
Lime  % 18-22
Sand  % 62-68
Gypsum  % 2-3
Aluminum % 0.8

NOTES:The proportion rate could be adjusted according to the conditions in different country.

C. AAC Block Size:
Length(mm)600 
Height(mm)150, 200, 250, 300 
Width(mm) 100, 125, 150, 200, 250, 300

Zhengzhou Temin Machinery Manufacturing Co., Ltd is specialized in AAC plant and brick making machine,
welcome to visit our factory, our website: www.brickmakingmachinetm.com
       

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