School of Civil Engineering

SRK03-S1

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Material description

Material ID: SRK03-S1

Material type: Glass fibre reinforced aluminium sarking with a polypropylene (PP) backing which contains inorganic filler.

Polymer: Polypropylene (82%)

Additives (fire retardants, fillers or traces of inorganic elements): Calcium Carbonate (18%), Titanium (1%), traces of other elements (<1%)

 

Table 1. Estimated mass concentration of compounds.
CompoundMass Concentration (%)
Polypropylene (PP)82
Calcium Carbonate (CaCO3)18
Titanium (Ti)1
Traces of silicon (Si)<1
Traces of aluminium (Al)<1
Traces of iron (Fe)<1
Traces of magnesium (Mg)<1

A. Material composition identification

A.1 Attenuated total reflection – Fourier transform infrared spectroscopy (ATR-FTIR)

Table 2. FTIR compound identification.
Identified Compounds
Polypropylene (PP)
Calcium Carbonate (CaCO3)
...
Figure 1 . FTIR spectra: Absorbance percentage versus wavenumber from the sample.
...
Figure 2. FTIR spectra: Absorbance percentage versus wavenumber from the sample and the identified compounds.

A.2 Energy Dispersive X-Ray Fluorescence (EDXRF)

Table 2. Inorganic elements and their mass concentration identified with EDXRF.
ElementMass Concentration (%)
Ca11
Ti1
Si<1
Al<1
Fe<1
Cu<1
Sc<1
S<1
Zn<1
Mg<1
...
Figure 3. EDXRF spectra. Counts vs energy. Identified elements are shown as vertical lines.

B. Thermogravimetric analysis

Table 3. Mass fraction of residue after thermal decomposition.
ConditionFraction of mass residue at 800°C
Non-oxidative (nitrogen)0.09
Oxidative (air)0.08
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 14812.486 x 10-2
Peak 27298.7 x 10-4
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 12581.7 x 10-3
Peak 23841.196 x 10-2
Peak 36788.6 x 10-4
...
Figure 4. Normalised mass (solid line) and derivative of the normalised mass (dashed line) in 150 ml min-1 of nitrogen and a heating rate of 20°C min-1.
...
Figure 5. Normalised mass (solid line) and derivative of the normalised mass (dashed line) in 150 ml min-1 of air and a heating rate of 20°C min-1 .