AAC Line Material: Building Waste, Tailings, Fly Ash, Sand, etc
Oversea Office: India, Indonesia, Iran etc.
After Service: Oversea Service with Professional Team
Project Service: Raw Material Test, Training, Performance Test
Total Plant: 400+ Plants
Trademark: KEDA
Origin: China

WHAT IS AAC?
The AAC production process includes raw material preparation, batching and mixing, pouring, precuring, cutting, autoclaving, and packing. With decades of experience in serving the AAC blocks production machinery industry, we can supply customers with quality AAC block production lines with capacity ranging from 80,000m3 to 40,000m3 per year.


Aerated Autoclave Concrete AAC Block Making Machinery
Chart 1 the parameter of the processes
Processes Parameter
Mixing period 5-6 minutes
Pouring slurry temperature 40-45ºC
Cake curing time 2.5-3.0h
Cake curing temperature 45~55ºC
Cake strength after curing 0.15~0.18MPa
Autoclaved curing system Before-after autoclave 0.5h
Vacuumize 0.5h(0~-0.06MPa)
Listing pressure 1.5h(-0.06~1.3MPa)
Constant pressure 8h(1.3MPa)
Releasing pressure 1.5h(1.3~0MPa)
total 12h
 

 RAW MATERIALS  
Siliceous materials : Sand / Fly ash / Tailings containing silicon / Ceramic waste
Calcareous material: Lime block + cement + gypsum
Others: Aluminum powder paste  
Aerated Autoclave Concrete AAC Block Making Machinery
THE ADVANTAGES OF AAC:

1. Low density : Can be 325kg /m3
2. Good thermal insulating properties
3. Cost few time to build, saving time
4. Easy to operate , saving labor cost
5. Good performance of preventing fire
6. Good sound-insulation properties
7. Durable , anti-seismic , recyclable

Aerated Autoclave Concrete AAC Block Making Machinery

Aerated Autoclave Concrete AAC Block Making Machinery


CUTTING SYSTEM

Special cutting design : All the steel wire columns are fixed on two main oblique  beams of cutting machine and each pair of the columns is used to fix only one steel wire , so that the horizontal  cutting machine can avoid the settlement cracks problem in thin block and panel cutting , and achieve the minimum horizontal cutting thickness of 50MM block out of a whole mould. The integral swing frame of the vertical cutting machine can ensure the side plate replacement , the cutting action can be synchronized with ferry replacement. With automatic detection system . the broken wire can be timely detected.
 
Aerated Autoclave Concrete AAC Block Making Machinery


PACKING SYSTEM

Automatic packing system can realize the automatic rotation stacking and splicing of blocks and  realize the packing function with pallet or non-pallet. The stacking specification can realize 1.2m×0.6m\ 1.2m×1m\ 1.2m×12m\ 1m×0.6m multiple  stacking , and the height of the stacking can be 1.2m, 1.5m , 1.8m and 2.4m. 
Aerated Autoclave Concrete AAC Block Making Machinery

AAC FINAL PRODUCTS

 1.Product classification

Product classification is according to national standards GB/T 11968-2006 AAC block, also can be according to user's requirements to produce product with special specifications size.
 
Chart 2 Specification & Index
Name AAC block
Weight 300~600 Kg/m3(control led by formula)
After autoclave compressive strength average value≥3.5MPa, Min. value<=2.8Mpa
Drying shrinkage value Measured under condition of rapid method≤0.8mm/m;Measured under condition of standard method≤0.5mm/m
Frost-resistance After the cycle of freezing and thawing for 15 times,weight loss≤ 5%,strength loss≤ 20%
Coefficient of thermal conductivity ≤0.14~0.16W/m.k
 
1.2 The block is classified by compressive strength and volume density.
Strength level: A1.0, A2.0, A2.5, A3.5, A5.0, A7.5, A10.
Dry density level: B03, B04, B05, B06, B07, B08.
 
 
1.3 Block level
The block is divided into high-class(A), first-class(B), qualified product (C) according to the size variation, appearance quality, dry density, compression strength & frost-resistance.
 
 
1.4  AAC Block indicator
Chart 3  Size variation& appearance
Project Indicator
High-class
(A)		 Qualified product
(B)
Permissible variation of dimension
mm		 Length L ±3 ±4
Width B ±1 ±2
Height H ±1 ±2
Missing angle The min. size not more than /mm 0 30
The max. size not more than /mm 0 70
Missing angle no. larger than the above size, not more than 0 2
Crack length The crack length through one edge and two surfaces not more than crack directional size sum on crack surface 0 1/3
The crack length of any surface can not be larger than crack directional size 0 1/2
The cracks larger than the above size, not more than 0 30
The depth of cracking, sticking, damage can not be more than/mm 0 1030
Plain bending Not allowed
Surface porosity, lamination crack Not allowed
Surface oil Not allowed
 
 
Chart 4  Cubic compression strength for block  
Strength level Cubic compression strength (MPa)
Average not less than Single group min. not less than
A1.0 1.0 0.8
A2.0 2.0 1.6
A2.5 2.5 2.0
A3.5 3.5 2.8
A5.0 5 4.0
A7.5 7.5 6.0
A10.0 10 8.0
 
 
Chart 5  Dry density for block(kg/m3)
Dry density level B03 B04 B05 B06 B07 B08
Dry density High-class (A)≤ 300 400 500 600 700 800
Qualified product
 (B)≤		 325 425 525 625 725 825
 
 
Chart 6  Strength level for block
Dry density level B03 B04 B05 B06 B07 B08
Strength level High-class (A)≤ A1.0 A2.0 A3.5 A5.0 A7.5 A10.0
Qualified product
 (B)≤		 A2.5 A3.5 A5.0 A7.5

 

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