Table 1.
Chemical compositions of metakaolin 1 and cathode ray tube (CRT) glass 2.
| Oxide Composition (wt %) | CRT Glass | Metakaolin |
|---|---|---|
| SiO2 | 76.10 | 53.12 |
| Na2O | 6.25 | 0.09 |
| CaO | 5.24 | 0.44 |
| BaO | 2.62 | - |
| K2O | 2.36 | 0.73 |
| MgO | 1.64 | 0.26 |
| PbO | 1.61 | - |
| SrO | 1.42 | - |
| Al2O3 | 1.37 | 42.14 |
| SO3 | 0.55 | - |
| Fe2O3 | 0.38 | 0.45 |
| ZrO2 | 0.28 | - |
| TiO2 | 0.12 | 0.64 |
| ZnO | 0.05 | - |
| As2O3 | 0.01 | - |
| H2O- | - | 0.22 |
| P2O5 | - | 0.03 |
| Cl | - | 0.02 |
| S | - | 0.01 |
| MnO | - | 0.01 |
1 Data obtained from the producer: Astra Technologia Betonu®, Straszyn, Poland.2 Chemical composition was determined by X-ray fluorescence (XRF) analysis, performed by EkotechLAB®, Gdańsk, Poland.