Research Article
Cement-Stabilized Granular Volcanic Ash Materials for Construction of Low-Traffic Roads in Yemen
Table 2
Chemical composition of cement and GVA.
| Composition | Average value | Amran portland cement % [42] | Black GVA % [43] | Red GVA % [44] |
| SiO2 | 21.8 | 47.2 | 46.6 | Al2O3 | — | 19.2 | 16.7 | Fe2O3 | 2.65 | 11.6 | 12.5 | CaO | 65.7 | 8.1 | 9.3 | MgO | 2.64 | 4.2 | 7.8 | K2O | 0.0 | 1.2 | 0.9 | Na2O | 0.65 | 4.8 | 2.7 | SO3 | — | 0.03 | 0.1 | P2O3 | — | 0.5 | 0.4 | TiO2 | — | 1.7 | 2.1 | LOI | 1.2 | 0.5 | 0.7 |
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