AAC block making machine
Products
High-performance AAC block making machine for superior construction solutions
Autoclaved Aerated Concrete (AAC) is a lightweight cellular silicate product primarily composed of silicon-based materials such as sand, fly ash, and gangue, along with calcium sources like cement and lime.
The manufacturing process begins with batching and mixing these ingredients, followed by the addition of a foaming agent, typically aluminium powder. The mixture is then poured into moulds and undergoes pre-curing.
Once set, it is cut into blocks and subjected to high-pressure steam curing (autoclaving). This process results in durable, lightweight concrete products suitable for various construction applications, offering excellent insulation and energy efficiency.
Major Types For Sale:
AAC block making machine
Ground turnover cutting machine
Batching machine
Air turnover cutting machine
Pouring mixer
Product Types
Major AAC block making machine for sale in HengXing Machinery
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Models for sale
Detailed Products
Check our quality AAC block making equipment
Introduction
Introduction of AAC block making production line
1. Storing and Supplying Raw Materials for AAC Blocks
The raw materials for AAC blocks, such as fly ash, sand, and lime, are transported to the factory by trucks. These materials are stored in designated areas within the raw materials yard until needed for production. Cement is stored in both sacks and bulk in a dedicated cement warehouse. Chemicals and aluminium powder are stored separately in dedicated chemical and aluminium warehouses. When required, these raw materials are individually transported into the workshop for processing.
2. Processing of Raw Materials
Fly ash, sand, or limestone is fed into ball mills using vibration feeders and belt conveyors. The finely ground fly ash, sand, or lime powders are then pumped into a slurry tank. Quick lime is delivered to jaw crushers via vibrating feeders and belt conveyors for crushing. The crushed lime is subsequently transferred to a lime silo using a bucket elevator and then moved to ball mills through a screw conveyor. The finely processed materials are gathered in a proportioning bin using a screw conveyor and bucket elevator.
3. Aerated Block Ingredients, Stirring, and Casting
The ingredients for the aerated blocks, including fly ash (or sand or stone powder) and waste slurry, are measured in a measuring tank. Once the materials are measured and the moulds are appropriately positioned, the stirring of the slurry begins. The temperature of the slurry must reach approximately 40°C for optimal mixing.
Cement, lime, fly ash type aerated block raw material proportion:
| Name | Unit | Proportion |
| Fly ash | % | 65-70 |
| Cement | % | 6-15 |
| Lime | % | 18-25 |
| Gypsum | % | 3-5 |
| Aluminum powder paste(600kg/m³) | 1/10000 | 8 |
| Water&material rate | 0.60-0.65 | |
| Curing temperature | ℃ | 36-40 |
| Aluminum mixing time | S | 30-40 |
Cement, lime, sand type aerated block raw material proportion:
| Name | Unit | Proportion |
| 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 |
Raw material processing:
（1）The cement is bulk cement, which is pneumatically transported to the cement storage bin by a bulk cement truck. The cement storage capacity considered in this design is 90t.
（2）After the lime and gypsum are crushed by the jaw crusher by calculation, the elevator enters the storage bin, is fed by electromagnetic vibration, enters the mill, and the finely mixed ash is transported by the elevator to the ash storage bin for backup.
（3）The sand is transported into the slurry storage tank through ball milling and water wet milling into a slurry storage tank, and after the slurry specific gravity required for production is reached, it is pumped to a stirring pouring machine through a slurry pump.
4. Aerated Block Pre-curing and Cutting
Ingredients Pouring
Once the raw materials are prepared, they are measured separately and then mixed using a stirring and pouring machine. The metered aluminium powder suspension is added to the mixture and stirred for 30 to 45 seconds before being poured into moulds.
Cutting Section
After pouring and foaming, the green body is allowed to sit statically for a specific duration (approximately 1.2 to 2 hours) until it achieves a certain degree of hardness. Once firm enough, the green body is lifted onto a steaming cart using a marshalling spreader and transferred into the autoclave.
Autoclave
Following the cutting of the green bodies, they are organized into specific quantities and transported to the autoclave, where they undergo the autoclaving process.
Features
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Advantages
Advantages AAC block making plant
Lightweight:
Aerated concrete has a dry bulk density ranging from 400 to 800 kg/m³, making it approximately one-third the weight of clay bricks and one-fifth that of normal concrete. This reduced weight lowers the overall structural load on buildings, allowing for smaller foundations, girders, and pillars. This results in material savings, lower project costs, and improved seismic resistance.
Excellent Thermal Insulation:
The internal structure of aerated concrete contains numerous tiny air pockets, providing exceptional thermal insulation properties. Its thermal conductivity coefficient typically ranges from 0.09 to 0.2 W/(m·K), which is only about one-fourth to one-fifth that of clay bricks and normal concrete. A 20 cm thick aerated concrete wall offers thermal insulation equivalent to a 49 cm thick wall made of normal clay bricks, effectively reducing heating and cooling energy consumption while maximizing building space efficiency.
High Processability:
Since aerated concrete does not contain coarse aggregates, it boasts excellent processability. It can be easily sawed, drilled, and pinned, and can bond well with suitable adhesives. This versatility simplifies construction operations and allows for easier customization onsite.
Abundant Raw Material Sources and Production Efficiency:
AAC can be manufactured from a variety of raw materials, including sand, slag, fly ash, tailings, coal gangue, quicklime, and cement. This adaptability allows for high utilization of local resources and industrial waste. A medium-sized AAC plant can achieve annual labor efficiency of up to 600 m³ per capita, while highly automated plants can reach 900 to 1,000 m³. This efficiency far exceeds that of clay bricks (180 m³) and concrete bricks (500-800 m³).
Moreover, the energy consumption for producing AAC units is only 50% of that of the same volume of clay bricks. Despite having only a 40-year industrial history in China, AAC has evolved to include a range of products, such as non-load-bearing and load-bearing blocks, insulation blocks, and wall and roof panels, establishing itself as a vital new building material for both industrial and civil construction.
Exported Cases
Exported cases around the world
What people says about us
We are highly impressed with the AAC block making equipment! Its precision and efficiency have greatly improved our production process. The blocks produced are consistently high quality, making this machinery an essential asset for our operations and growth. Highly recommended!
Peter Njoroge / From Kenya
