| DI | Deionization |
| FA | Fly ash |
| FTIR | Fourier transform infrared |
| LOI | Loss of ignition |
| RH | Relative humidity |
| SCBA | Sugarcane bagasse ash |
| SEM | Scanning electron microscope |
| XRF | X-ray fluorescence |
| XRD | X-ray diffraction |
| XPS | X-ray photoelectron spectroscopy |
| ε ′ | Dielectric constant |
| C | Sample’s capacitance |
| t | Sample’s thickness |
| ε 0 | Permittivity of free space (8.854 × 10−12 F/m) |
| %W | Workability |
| d | Spread-out diameter of geopolymer paste |
| d 0 | Original diameter |
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