School of Civil Engineering

SRK05-S1

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Material description

Material ID: SRK05-S1

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

Polymer: Polypropylene (81%)

Additives (fire retardants, fillers or traces of inorganic elements): Calcium Carbonate (14%), Chlorine (5%), traces of other elements (<1%)

 

Table 1. Estimated mass concentration of compounds.
CompoundMass Concentration (%)
Polypropylene (PP)81
Calcium Carbonate (CaCO3)14
Chlorine (Cl)5
Traces of aluminium (Al)<1
Traces of silicon (Si)<1
Traces of iron (Fe)<1
Traces of sodium (Na)<1
Traces of sulfur (S)<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 (%)
Ca8
Cl7
Si<1
Fe<1
Al<1
Na<1
S<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)0.10
Oxidative (air)0.11
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 12992.02 x 10-3
Peak 24761.774 x 10-2
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 13023.14 x 10-3
Peak 24159.28 x 10-3
Peak 34521.53 x 10-3
Peak 46683.3 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 .