Autoclaved Aerated Concrete (AAC) blocks deliver superior performance in lightweight strength, thermal insulation, fire resistance, and environmental sustainability. Discover why leading builders choose AAC for modern construction projects.
Lightweight & High Strength
AAC blocks feature a dry density of just 400-700 kg/m³—only 28% of clay bricks and 20% of traditional concrete. This significant weight reduction minimizes structural load while maintaining excellent compressive strength from 1.5 to 5.0 MPa.
Construction Efficiency
One AAC block equals 18 standard clay bricks, dramatically accelerating construction speed. The material allows easy cutting, drilling, nailing, hanging, and grooving, simplifying pipeline installation and secondary finishing work.
Superior Thermal Insulation
The micro-cellular structure creates air pockets that deliver outstanding thermal performance. With thermal conductivity ranging from 0.10 to 0.18 W/(m·K) depending on density grade, AAC provides 87% better insulation than concrete and 71.4% better than clay bricks—achieving remarkable energy efficiency.
Dimensional Precision
Manufactured with tight tolerances of ±1.0mm on all sides, AAC blocks enable thin-bed mortar construction. This precision eliminates thermal bridges and prevents cracking issues common in traditional masonry.
Fire Safety
AAC is a non-combustible inorganic material with fire resistance exceeding 700°C. A 200mm thick AAC wall achieves 8-hour fire rating (Class A fireproof material). Different thicknesses meet various fire rating requirements without releasing toxic gases under high temperatures or open flame.
Acoustic Performance
Meeting 30-60 dB sound insulation requirements, AAC's porous structure provides excellent sound absorption—blocking external noise while creating comfortable indoor acoustic environments.
Moisture Resistance
Uniformly distributed closed pores (1-2mm diameter) combined with specialized anti-seepage formulations effectively prevent water diffusion. AAC walls demonstrate 85% better water resistance than clay brick walls.
Environmental Sustainability
AAC production protects farmland resources, eliminating the high energy consumption, pollution, and land occupation associated with clay brick manufacturing.
Technical Specifications Table:
| Strength Level | Compressive Strength (MPa) | Dry Density Grade | Average Dry Density (kg/m³) | Thermal Conductivity W/(m·K) |
| A1.5 | ≥1.5 (avg) / ≥1.2 (min) | B03 | ≤350 | 0.1 |
| A2.0 | ≥2.0 / ≥1.7 | B04 | ≤450 | 0.12 |
| A2.5 | ≥2.5 / ≥2.1 | B04/B05 | ≤450/≤550 | 0.12-0.14 |
| A3.5 | ≥3.5 / ≥3.0 | B04/B05/B06 | ≤450/≤550/≤650 | 0.12-0.16 |
| A5.0 | ≥5.0 / ≥4.2 | B05/B06/B07 | ≤550/≤650/≤750 | 0.14-0.18 |
