Thermal Conductivity Rating

For BRUHN Limestone – supplied by Curtin University.

• Thermal Conductivity (k) = 0.49 +/- 0.04 Wm-1K-1
• *Thermal Resistance R @ 100mm = 0.20 +/-0.03 m2KW-1
• (“R value”) R @ 120mm = 0.25 • R @ 140mm = 0.29
• This report has been written and tests performed in accordance with AS/NZ 4859.1
• Measurement reference number 0091,0092,0093 • Calibration Reference material NIST SRM 1453 • Sample Bruhn Limestone, Second Strata • Metering Area (A) = 0.038 m2
• Sample Thickness (t) = 49.3 +/-0.5mm
• Sample Density = 2360 +/-50kg/m3
• Temperature of cold plate (Tc) = 14.9 +/-0.1 deg
• Temperature of hot plate (Th) = 32.6 +/-0.1 deg
• Temperature difference (Delta T) = 17.8 +/-0.2 deg
• Mean Temperature = 23.7 +/- 0.1 deg
• Power to hot plate (VI) = (18.61)*(0.714) watts
• Ambient Temperature = 21.0 deg
• Ambient Humidity = 45.2 %
• Date of measurement 20/5/05 – 26/5/05

*As a comparison to other products as published by the Australian Institute 90mm Brick 0.05 to 0.07 100mm Concrete Block 0.07 300mm Mud Brick 0.27