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Autoclaved aerated concrete is a kind of wall material with many advantages, such as heat preservation, fire prevention, sound insulation, moisture-proof, environmental protection,recycled using etc. The AAC products with porous structure are lighter, and easier to cut, drill and construct which saves the labour cost.


We are specialized in providing services for the whole plant solution of autoclaved aerated concrete, including raw material testing, plant planning, customized equipment design, equipment manufacturing, pre delivery inspection, supervision of project site installation and personnel training. 


The Autoclaved Aerated Concrete production process includes raw material preparation, batching and mixing, pouring, precuring, cutting, autoclaving, and packing. With decades of experience in serving the AAC  production machinery industry, we can supply customers with quality AAC block/ panel plant solutions with capacity ranging from 80,000m3 to 40,000m3 per year.



ProcessParameter
Mixing period5-6 minutes
Pouring slurry temperature40-45 C
Cake curing time2.5-3.0h
Cake curing temperature45~55 C
Cake strength after curing0.15~0.18MPa
Autoclaved curing system Before-after autoclave0.5h
Vacuumize0.5h(0 ~ -0.06MPa)
Listing pressure1.5h(-0.06~1.3MPa)
Constant pressure8h(1.3MPa)
Releasing pressure1.5h(1.3~0MPa)
total12h

 

RAW MATERIALS  

Siliceous materials : Sand / Fly ash / Tailings containing silicon / Ceramic waste 
Calcareous material: Lime block + cement + gypsum 
Others: Aluminum powder paste 

Cement

Cement technical requirements as blow:
(1) Free CaO content should be not more than 1.5%, CaO content is 60%.
(2) NaCl & KCl content should be not more than1%~1.5%.
(3) Specific surface area 2500~3500cm3/g.
(4) Volume stability is qualified.
(5) Setting time initial setting 1~3h final setting 3~6h.
 
Sand

Main technical index for sand
Name
Grade
SiO2% K2O+Na2O% Organic matter Mica% SO3% Mud% Moisture content%
High-class 85 1 Qualified 0.5 1 3 8
Firs-class 75 3 5
Qualified product 65 5 1 2 8

Grain composition for sand
Name
Grade
Content,%
High-class First-class Qualified product
2.5~5.0(round hole) 0 0
1.25~2.5(square hole) 10 10
0.16~0.25(square hole) 60 45
<0.16(square hole) 30 45


Lime
Lime is also one of the main raw material. Its function is coordinating with cement to provide effective calcium oxide, than makes it working with SiO2, Al2O3 from silica material under hydrothermal condition to generate hydrated calcium silicate. 
 Effective calcium oxide content should be more than 65%, the best is more than 80%.

 
Aluminum paste ( powder)
Aluminum paste is according to JC/T 407 Aluminum Paste for AAC standard. Aluminum powder should be according to the current national standard, the requirements of Aluminum Powder Part 2: Ball Mill Aluminum Powder GB/T 2085. 2.

Gypsum
The regulating effect of gypsum mainly reflects in deferring the speed of quick lime digesting & slurry thickening. 
 
Water
According to the standard, water ratio is advisable to 0.60.

Water quality requirement
Content pH Cl-  (mg/L) SO42-(mg/L) Na+ +K+(mg/L) K+  (mg/L)
Operating range 6~9 <600 <1000 <450 <100
AAC production
 
【 Pouring Mixer 】
AAC panel
 
【 Reinforcement 】
AAC production
 
【 Cutting System 】
Automatic AAC production
 
【 Central Control 】
Automatic AAC Packing
 
【 AAC Packing 】
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[NEWS] Feb 08,2021
Warm tips for Spring Festival holiday of KEDA Suremaker

It is kindly informed that our company is scheduled for the Chinese New Year, and the holidays are from February 9th to February 19th, we will be back to work on February 20th.

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[NEWS] Nov 24,2020
Warmly celebrate the successful completion of the 40th annual meeting of China's Aerated Concrete Association

Warmly celebrate the successful completion of the 40th annual meeting of China's Aerated Concrete Association. During this meeting, Mr. Chadwick,the MD of KEDA SUREMAKER, was invited to give a persuasive speech at the opening ceremony to call on the whole industry to continuously improve the technol

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[NEWS] Nov 24,2020
The third cooperation between Shandong LianHai and KEDA SUREMAKER for a new AAC panel and block production line with the capacity of 400,000 cubic meters per year

Now, the third cooperation between Shandong LianHai and KEDA SUREMAKER for a new AAC panel and block production line with the capacity of 400,000 cubic meters per year in Shandong Province has entered the stage of electrical installation.

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[NEWS] Oct 08,2020
The new edition of national standards for AAC industry in 2020 compiled by KEDA SUREMAKER have been approved successfully

The new edition of national standards for AAC industry in 2020 compiled by KEDA SUREMAKER have been approved successfully

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CONTACT

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