Measured Data

Specific Heat

Experiments for specific heat [J/(kg K)], or heat capacity, were conducted using a heat flow meter on unconditioned and dried samples at 10 °C, 20 °C, 30 °C and 40 °C.

Unconditioned

Temperature (C) Specific Heat Mean (J/kg-K) Standard Deviation (J/kg-K)
10.0 1403.0 18.0
20.0 1447.0 53.0
30.0 1534.0 28.0
40.0 1564.0 47.0

Dried

Temperature (C) Specific Heat Mean (J/kg-K) Standard Deviation (J/kg-K)
10.0 1200.0 18.0
20.0 1250.0 26.0
30.0 1283.0 33.0
40.0 1361.0 14.0

Thermal Conductivity

Experiments for thermal conductivity [W/(m K)] were conducted using a heat flow meter on unconditioned and dried samples at 15 °C and either 45 °C or 65 °C.

Unconditioned

Temperature (C) Conductivity Mean (W/m-K) Standard Deviation (W/m-K)
15.0 0.061 0.001
65.0 0.071 0.001

Dried

Temperature (C) Conductivity Mean (W/m-K) Standard Deviation (W/m-K)
15.0 0.060 0.001
65.0 0.068 0.001

Mass Loss Rate (MLR)

Mass loss rate [kg/s] was measured in cone calorimeter experiments at three heat fluxes: 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material shrivels under thermal exposure causing the corners and edges of the sample to curl upwards and towards the center during cone calorimeter tests. The use of an edge frame was successful in limiting this behavior. Test HF25_R1 was an exception, however, where an edge of the sample lifted free from the edge frame and impacted the spark ignitor, causing a spike in the mass time history data. A calcium silicate substrate was included beneath the samples.

Cone Calorimeter: 25 kW/m2

Cone Calorimeter: 50 kW/m2

Cone Calorimeter: 75 kW/m2

Heat Release Rate Per Unit Area (HRRPUA)

Experiments for heat release per unit area [kW/m2] were conducted on samples conditioned at 20°C and 50% relative humidity using a cone calorimeter at three different heat fluxes: 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material shrivels under thermal exposure causing the corners and edges of the sample to curl upwards and towards the center during cone calorimeter tests. The use of an edge frame was successful in limiting this behavior. Test HF25_R1 was an exception, however, where an edge of the sample lifted free from the edge frame and impacted the spark ignitor, causing a spike in the mass time history data. A calcium silicate substrate was included beneath the samples.

Cone Calorimeter: 25 kW/m2

Cone Calorimeter: 50 kW/m2

Cone Calorimeter: 75 kW/m2

Carbon Monoxide (CO) Yield

Carbon monoxide yield was measured during cone calorimeter experiments conducted at heat fluxes of 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material shrivels under thermal exposure causing the corners and edges of the sample to curl upwards and towards the center during cone calorimeter tests. The use of an edge frame was successful in limiting this behavior. Test HF25_R1 was an exception, however, where an edge of the sample lifted free from the edge frame and impacted the spark ignitor, causing a spike in the mass time history data. A calcium silicate substrate was included beneath the samples.

Incident Heat Flux [kW/m²] Mean CO Yield [g/g] CO Yield Std. Dev. [g/g]
25 0.014 0.003
50 0.02 0.003
75 0.015 0.003

Specific Heat Release Rate

Experiments for specific heat release rate [W/g], were conducted using a micro-scale combustion calorimeter at a heating rate of 30 K/min.

Derived Data

Soot Yield

Soot yield [g/g] was calculated from smoke obscuration data collected in cone calorimeter experiments conducted at heat fluxes of 25 kW/m2, 50 kW/m2, and 75 kW/m2.

This material shrivels under thermal exposure causing the corners and edges of the sample to curl upwards and towards the center during cone calorimeter tests. The use of an edge frame was successful in limiting this behavior. Test HF25_R1 was an exception, however, where an edge of the sample lifted free from the edge frame and impacted the spark ignitor, causing a spike in the mass time history data. A calcium silicate substrate was included beneath the samples.

Incident Heat Flux [kW/m²] Mean Soot Yield [g/g] Soot Yield Std. Dev. [g/g]
25 0.023 0.004
50 0.019 0.001
75 0.018 0.001

Effective Heat of Combustion (Δhc)

Effective heat of combustion [MJ/kg] is calculated from data collected in both micro-scale combustion calorimeter experiments and cone calorimeter experiments.

Cone Calorimeter Test Notes:
This material shrivels under thermal exposure causing the corners and edges of the sample to curl upwards and towards the center during cone calorimeter tests. The use of an edge frame was successful in limiting this behavior. Test HF25_R1 was an exception, however, where an edge of the sample lifted free from the edge frame and impacted the spark ignitor, causing a spike in the mass time history data. A calcium silicate substrate was included beneath the samples.

Micro-scale Combustion Calorimeter

Value R1 R2 R3 Mean Std. Dev.
Heat of Combustion (MJ/kg) 13.89 14.52 15.1 14.5 0.49

Cone Calorimeter

Incident Heat Flux [kW/m²] Mean Effective Heat of Combustion [MJ/kg] Effective Heat of Combustion Std. Dev. [MJ/kg]
25 17.8 0.4
50 19.7 0.6
75 18.5 1.6

Band Averaged Emissivity

Band averaged emissivity was calculated from reflectance measurements conducted with an integrating sphere and Fourier transform infrared spectrometer.

Source Temperature [K] Emissivity Std. Dev.
600.0 0.888 0.003
800.0 0.855 0.004
1000.0 0.817 0.006
1200.0 0.777 0.009
1400.0 0.740 0.012
1600.0 0.708 0.015
1800.0 0.682 0.018
2000.0 0.661 0.021