Aerated Concrete Block
Concrete/Masonry
ATLAS CODE
MIN-CEM-CMU-005
Category mineral
Material Family Cementitious
Regulatory Status non-combustible
Density
525-650 kg/m3
Carbon (A1-A5)
Not specified kg CO2-eq/kg
Fire Class
non-combustible
Lifespan
Not specified years
Description
Autoclaved aerated concrete (AAC) blockwork is made with closed air pockets formed by a foaming agent and steam autoclaving. AAC is around one-fifth the weight of normal concrete and AAC blockwork can be loadbearing up to 3 storeys. CSR Hebel block products list nominal dry densities around 525-650 kg/m3 for AAC blocks.
Typical Uses
- Loadbearing walls up to 3 storeys
- Non-loadbearing internal partitions
- External AAC walls with vapour-permeable, water-resistant coatings
Recycled Content Not specified
Renewable Content Not specified
Recyclability Not specified
Embodied Carbon Not specified kg CO2-eq/kg
Embodied Energy Not specified MJ/kg
EPD Available Yes
Advantages
AAC is about one-fifth the weight of normal concrete, reducing manual handling loads.Good thermal insulation and fire performance; AAC is incombustible and can achieve up to 4 hours fire rating depending on thickness.AAC blockwork can be loadbearing up to 3 storeys.
Cautions
AAC is relatively easy to work with but can be easily damaged, requiring careful handling.External AAC requires vapour-permeable, water-resistant coatings to prevent moisture penetration.Not specified
TECHNICAL DATA: PERFORMANCE PROPERTIES MIN-CEM-CMU-005
Density (Dry) 525-650 kg/m3
Specific Gravity Not specified
Porosity Not specified %
Water Absorption Not specified %
Hardness Not specified Mohs
Surface Roughness Not specified um
UV Resistance Not specified
Chemical Resistance Not specified
pH Tolerance 9.0-10.5 pH
Compressive Strength 2.25 MPa
Tensile Strength Not specified MPa
Flexural Strength 0.44 MPa
Shear Strength 0.3 MPa
Elastic Modulus 1125 MPa
Yield Strength Not specified MPa
Impact Resistance Not specified
Bearing Capacity Not specified kPa
Poisson's Ratio Not specified
Creep Resistance Not specified
Abrasion Resistance Not specified
Thermal Conductivity 0.08-0.16 W/mK
Thermal Resistance Not specified m2K/W
Specific Heat Capacity Not specified J/kgK
Thermal Expansion 10 x10^-6/C
Melting Point 1600 C
Ignition Temperature Not specified C
Sound Transmission Class (STC) Not specified
Noise Reduction Coeff. (NRC) Not specified
Optical
Light Transmittance Not specified %
Light Reflectance (LRV) Not specified %
Solar Reflectance (SRI) Not specified
AAC has been used in Europe since the 1920s, and YourHome notes AAC production in Australia began in 1990; its use has grown, although the Australian AAC market is dominated by one manufacturer.
SAFETY, ECOLOGY & INSTALLATION MIN-CEM-CMU-005
Flame Spread Index Not specified
Smoke Developed Index Not specified
Combustibility Class non-combustible
Ignition Temperature Not specified C
Fire Resistance Rating up to 240/240/240 (system dependent) minutes
Heat Release Rate Not specified kW/m2
Toxicity of Combustion Not specified
Embodied Carbon (A1-A3) Not specified kg CO2-eq/kg
Embodied Energy Not specified MJ/kg
Water Footprint Not specified L/kg
EPD Available Not specified
Recycled Content Not specified %
Renewable Content Not specified %
LEED Points Not specified points
Circular Economy Score Not specified /10
VOC Emissions Not specified ug/m3
Skill Level Not specified
Crew Size Not specified persons
Installation Time Not specified hours/m2
Curing Time Not specified hours
Setting Time Not specified hours
Temperature Range Not specified C
Humidity Range Not specified %RH
Required Tools
Not specifiedNot specifiedNot specified
Certifications Required
Not specifiedNot specified
Weather Limitations
Not specifiedNot specified
COMMERCIAL, LOGISTICS & REGULATORY MIN-CEM-CMU-005
Material Cost Not specified AUD/m2
Installation Cost Not specified AUD/m2
Annual Maintenance Not specified AUD/m2/year
Lifecycle Cost (50yr) Not specified AUD/m2
Market Availability Not specified
Lead Time Not specified days
Design Life Not specified years
Warranty Period Not specified years
Maintenance Interval Not specified days
Service Temp Range Not specified C
Freeze/Thaw Resistance Not specified cycles
Dimensional Stability 0.2 mm/m
DISCLAIMER: This specification document is generated from the CLAD Materials Atlas Database. Information is for general guidance only and does not constitute professional engineering advice. Values are typical and may vary by batch, manufacturer, and production run. Verify suitability for specific project applications independently.