Aerated Autoclave Concrete AAC Block Making Machinery
June 14 15:07:39, 2023
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.
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
Â
 RAW MATERIALS  Siliceous materials : Sand / Fly ash / Tailings containing silicon / Ceramic waste Calcareous material: Lime block + cement + gypsum Others: Aluminum powder paste  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
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. Â
PACKINGÂ 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.Â
AAC FINAL PRODUCTS
 1.Product classification
Product classification is according to national standards GB/T 11968-2006Â AAC block, also can be according to user's requirements to produce product with special specifications size. Â
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 Â
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