Atlas index
Block · 230 × 110 × 76 mm
Clay-Based — indicative fig. M·39

Standard Australian clay brick (230x110x76mm) with rough finish texture. Non-combustible masonry unit suitable for structural walls, providing excellent fire resistance and durability.

01 Physical

Density 1920kg/m³
Specific gravity 1.92
Porosity 15%
Water absorption 12%
Hardness 6.5
UV resistance excellent
Chemical resistance moderate
pH tolerance 7-14
Surface roughness 3.5µm

02 Mechanical

Tensile strength 2MPa
Compressive strength 30MPa
Flexural strength 3.2MPa
Shear strength 0.3MPa
Poisson's ratio 0.15
Impact resistance moderate
Creep resistance excellent

03 Thermal

Thermal conductivity 0.65W/m·K
Specific heat 0.92J/kg·K
Thermal expansion 0.0000055×10⁻⁶/°C

04 Compliance & Fire First question

Combustibility class non-combustible
Fire resistance level 90
Flame spread index 0
Smoke dev. index 0
Heat release rate 0

05 Sustainability & Health

Embodied carbon 0.22
Carbon footprint 135
Embodied energy 2.5MJ/kg
Water footprint 5.2L/kg
Recyclability 100%
Recycled content 10%
Renewable content 0%
Circular score 85
VOC emissions 0
Toxicity rating non-toxic
LEED contribution 4

06 Durability · Cost · Logistics

Expected lifespan 100
Maintenance interval 10
Warranty period 50
Material cost (range) 350-900
Material cost (per unit) 0.55
Lead time 1-2 weeks
Lifecycle cost 12
Annual maintenance 50
Market availability excellent

07 Assessment

Advantages

  • Non-combustible with FRL up to 240 minutes
  • 100+ year service life expectancy
  • Suitable for all BAL ratings including BAL-FZ
  • High compressive strength (25-34 MPa typical)
  • Excellent thermal mass (149.6 kJ/m²·K)
  • Minimal maintenance requirements
  • Pest and termite resistant
  • 100% recyclable at end of life
  • Good acoustic performance (STC 45-48 dB)
  • Locally manufactured in Australia

Constraints

  • Higher initial cost than lightweight alternatives
  • Heavy material (2.7-2.9 kg per brick)
  • Subject to moisture expansion (0.3-3.7mm/m)
  • Low thermal resistance (R0.14-0.20)
  • Requires skilled trades for installation
  • Thermal bridging requires mitigation
  • Efflorescence potential in early stages
  • Extended construction time compared to panels
  • Transport costs for regional projects

08 Applications

A1 Load-bearing walls (up to 4 storeys)
A2 External veneer cladding
A3 Internal partition walls
A4 Retaining walls
A5 Fire-rated wall construction
A6 Acoustic barriers
A7 Garden walls and landscaping
A8 Rendered wall substrates
A9 Bushfire-prone area construction (BAL-12.5 to BAL-FZ)

09 Sources & Standards

Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.

MATERIALS ATLAS · CL·AD M·39 · data indicative — verify per project