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Autocalve Aerated(Light Weight) Concrete Block
Autocalve Aerated(Light Weight) Concrete Block

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Areated concrete brick (light brick ) is the light and porous buidling material. It has light weight keeping temperature.

Areated concrete brick (light brick )

1.introduction

Areated concrete brick (light brick ) is the light and porous buidling material. It has light weight keeping temperature cant burn and other advantages.it can be made into many kinds of bricks(for example:600×200×100,80×80×180,240×115×53,600×200×125),they could be used industry building and common building.they are more and more popular in the world.in the future,they will replace the Clay brick completely.

 

2.Areated concrete common conception

Common concrete density is usually 1600-2400kg/m3,but Areated concrete are 500kg/m3,600kg/m3,700kg/m3.It has not the big grain,main use silicon material (for example:coal ash,sand,stone dust and others ),through making the material small for example sand,they can be used directly if has enough degree of small (for example coal ash.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 the curing room to concreting cutting steaming curing,last,there will bacome the light brick,the porous rate is 70-80%.

 

3.Advantages

     light weight

     Areated 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.then you can see,it can save the material and cost,it also fighting shaking.

     keeping temperature

     It has many  porous,the delivery hearting coefficient is 0.9-0.22W/(mk),the 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 wasteMain Material:coal ash sand waste mine material coal stone,stone dust and other silicon materials. 

1 Product weight is according to 600kg/m3 to control.
2 annual capacity 300,000M3.
3 set raw  material proportion: cement 6.5%, raw lime 23%, flyash 68%, gypsum 3%, aluminum paste powder 350g/M3.
4 water and material rate 0.631
5 one mould product 2.88M3
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, total 6.5 hours.
10 Cement lime fly ash style aerated block raw material proportion

 

Name

Unite

Cement lime fly ash

Fly ash

%

65-70

Cement

%

6-15

Lime

%

18-25

Gypsum

%

3-5

Aluminum powder paste(600kg/m3)

1/10000

8

Water & material rate

 

0.6.-0.65

Casting system

 

36-40

Aluminum mixing time

S

30-40

11.cement lime sand style aerated block raw material proportion

Name

Unit

Cement lime sand

Sand

%

55-65

Cement

%

10-20

Lime

%

20-30

Gypsum

%

2-3

Aluminum powder paste(600kg/m3)

1/10000

8

Water & material rate

 

0.65-0.75

Casting system

 

35-38

Aluminum mixing time

S

30-40

 

Reference:cement is 42.5 Portland or 42.5 common cement

Aluminum power paste calculate to use according to 600kg/m3

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