School of Civil Engineering

OTH20

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Material description

Material ID: OTH20

Material type: Predominantly organic composition rich in aromatics, such as cellulose-based and/or phenolic polymers.

Polymer: Phenolic resin and cellulose (99%)

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

 

Table 1. Estimated mass concentration of compounds.
CompoundMass Concentration (%)
Phenolic resin and cellulose (-)99
Calcium (Ca)1
Traces of sodium (Na)<1
Traces of sulfur (S)<1
Traces of potassium (K)<1
Traces of silicon (Si)<1

A. Material composition identification

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

Table 2. FTIR compound identification.
Identified Compounds
Phenolic resin and cellulose (-)
...
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 (%)
Ca1
Na<1
S<1
K<1
Si<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)0.31
Oxidative (air)0.02
Table 4. Temperature and amplitude of main peaks in non-oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 13467.49 x 10-3
Peak 23961.84 x 10-3
Table 5. Temperature and amplitude of main peaks in oxidative conditions.
Peak IDTemperature peak (°C)Amplitude of peak (°C-1)
Peak 13406.34 x 10-3
Peak 24626.34 x 10-3
...
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 .