Block · 600 × 300 × 20 mm
Stone — indicative fig. M·114
Fire A1 Non-combustibleEmbodied carbon Data pending Compressive 126MPa StructuralDesign life 100yr Durable
Dense volcanic basalt with proven 150+ year performance in Australian conditions. Non-combustible, highly durable stone suitable for building envelopes, with excellent weathering characteristics and natural patina development.
01 Physical
Density 2596kg/m³
Specific gravity 2.6
Porosity 4.55%
Water absorption 1.83%
Hardness 6.5
UV resistance Good - natural fading to lighter grey
Chemical resistance Good except acids
pH tolerance 4-10
Surface roughness 0.5µm
02 Mechanical
Tensile strength 14.5MPa
Compressive strength 126MPa
Flexural strength 15.3MPa
Poisson's ratio 0.25
Impact resistance High
Creep resistance Excellent
03 Thermal
Thermal conductivity 2.25W/m·K
Specific heat 900J/kg·K
Thermal expansion 0.000008×10⁻⁶/°C
04 Compliance & Fire First question
Combustibility class Non-combustible
Fire resistance level System dependent
Flame spread index 0
Smoke dev. index 0
Heat release rate 0
05 Sustainability & Health
Recyclability 100%
Recycled content 0%
Renewable content 0%
VOC emissions 0
Toxicity rating Non-toxic
06 Durability · Cost · Logistics
Expected lifespan 100
Maintenance interval Annual
Warranty period Materials only
Material cost (range) 66-70
Material cost (per unit) 85
Lead time 2-4 weeks
Annual maintenance 5
Market availability Good
07 Assessment
Advantages
- Non-combustible (BAL-FZ compliant)
- 150+ year proven Australian performance
- Low water absorption (1.4-1.83%)
- Excellent freeze-thaw resistance
- Develops attractive natural patina
- 100% recyclable at end of life
- Locally sourced Victorian material
- High compressive strength (126 MPa)
- Zero VOC emissions
- Termite and pest resistant
Constraints
- High thermal conductivity (minimal insulation)
- Heavy weight (52kg/m² at 20mm)
- Requires annual sealing for honed finish
- No EPD available (limits Green Star credits)
- Skilled installation required
- Higher initial cost than alternatives
- Susceptible to acid damage
- Limited thermal mass at 20mm thickness
- Can fade from UV exposure over time
- Requires mechanical handling equipment
08 Applications
A1 Building cladding and facade systems
A2 Wall panels and rainscreen systems
A3 Paving and external flooring
A4 Pool surrounds and coping
A5 Heritage restoration projects
A6 Architectural features and detailing
A7 Kerbing and civil infrastructure
A8 Retaining walls and landscaping
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.