Research Article
Heating Experiment of CNT Cementitious Composites with Single-Walled and Multiwalled Carbon Nanotubes
Table 2
Specific characterization of CNTs.
| | Type of CNT | Properties | Unit | Value | Method of measurement |
| | MWCNTs | Average diameter | | 9.5 | Transmission electron microscopy (TEM) | | Average length | μm | 1.5 | Transmission electron microscopy (TEM) | | Carbon purity | % | 90 | Thermogravimetric analysis (TGA) | | Transition metal oxide | % | <1% | Inductively coupled plasma mass spectrometry (ICP-MS) | | Amorphous carbon | — | | High resolution transmission electron microscopy (HRTEM) | | Surface area | m/g | 250–300 | BET surface area analysis | | Volume resistivity | Ω | | Internal test method (resistivity on powder) |
| | SWCNTs | Average diameter | | | Transmission electron microscopy (TEM) | | Average length | μm | >5 | Transmission electron microscopy (TEM) | | Carbon purity | wt.% | >85 | Thermogravimetric analysis (TGA) | | Volume resistivity | Ω | – | Internal test method (resistivity on powder) |
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