Autoclaved Aerated Concrete
Autoclaved aerated concrete, commonly known as AAC, is a lightweight precast building material produced through a precise manufacturing process that combines cement, lime, sand, water, and an expansion agent. It offers superior thermal insulation, fire resistance, and structural performance, making it a top choice for modern construction projects ranging from residential homes to commercial complexes. To support consistent production quality and operational efficiency, facilities often integrate specialized infrastructure such as a brick machine maintenance room, which ensures that forming and cutting equipment stays in peak condition. For dedicated AAC lines, a concrete brick machine maintenance room provides a controlled environment for servicing key components, reducing unplanned downtime. In large-scale block production, a block machine maintenance room is critical for preserving calibration and mold integrity, which directly impacts block dimensional accuracy. If you are expanding your facility, you can explore a brick machine maintenance room for sale to rapidly upgrade your maintenance capabilities without lengthy construction delays.
Autoclaved Aerated Concrete stands out for its impressive technical specifications. The material typically achieves a dry density range of 400 to 800 kg/m³, delivering compressive strengths from 2.5 MPa to 7.5 MPa depending on the class. Its thermal conductivity sits exceptionally low, between 0.09 and 0.21 W/(m·K), directly contributing to energy-efficient building envelopes. Fire resistance ratings exceed four hours for 100 mm thick panels, offering robust life safety. Acoustically, a 100 mm AAC wall provides a weighted sound reduction index of 37 to 44 dB, ensuring comfortable interior noise levels. The table below outlines our standard block and panel parameters for clear reference.
| Product Grade |
Dry Density (kg/m³) |
Compressive Strength (MPa) |
Thermal Conductivity (W/(m·K)) |
Fire Resistance (mm thickness for 4h) |
Typical Application |
| AAC-2.5 |
400–500 |
2.5–3.0 |
0.09–0.12 |
100 |
Non-load-bearing partitions |
| AAC-3.5 |
500–600 |
3.5–4.0 |
0.12–0.15 |
100 |
Load-bearing walls (low-rise) |
| AAC-5.0 |
600–700 |
5.0–5.5 |
0.15–0.18 |
100 |
Multi-story load-bearing |
| AAC-7.5 |
700–800 |
6.0–7.5 |
0.18–0.21 |
150 |
High-rise load-bearing structures |
In addition to the core physical properties, our Autoclaved Aerated Concrete products feature precise dimensional tolerances of ±1.5 mm for blocks and ±2.0 mm for panels, facilitating thin-bed mortar application and faster construction cycles. The moisture content at delivery is maintained below 12%, minimizing shrinkage and cracking risks. With a service life exceeding 100 years under normal conditions and full recyclability, this material aligns with green building certifications such as LEED and BREEAM. The lightweight nature—roughly one-fifth the weight of traditional concrete—reduces structural steel requirements and foundation costs, while large block sizes lower labor input and waste generation on site.
