School of Civil Engineering

SRK11-S1

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Material description

Material ID: SRK11-S1

Material type: Glass fibre reinforced aluminium sarking with polypropylene backing.

Polymer: Polypropylene (87%)

Additives (fire retardants, fillers or traces of inorganic elements): Calcium (9%), Titanium (3%), traces of other elements (<1%)

 

Table 1. Estimated mass concentration of compounds.
CompoundMass Concentration (%)
Polypropylene (PP)87
Calcium (Ca)9
Titanium (Ti)3
Traces of iron (Fe)<1
Traces of silicon (Si)<1
Traces of aluminium (Al)<1
Traces of potassium (K)<1
Traces of scandium (Sc)<1
Traces of zinc (Zn)<1
Traces of chlorine (Cl)<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)
...
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 (%)
Ca9
Ti3
Fe<1
Si<1
Al<1
K<1
Sc<1
Zn<1
Cl<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)0.06
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 14692.794 x 10-2
Peak 26885.9 x 10-4
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 13771.217 x 10-2
Peak 26707.6 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 .