| Title | Study of the synergistic impact of Fe3O4, Na2CO3 and organic C on kaolin-based lightweight aggregates by a DOE (Mixture Experiments) approach |
|---|---|
| ID_Doc | 19905 |
| Authors | Moreno-Maroto, JM; Cobo-Ceacero, CJ; Martínez-Rodríguez, AM; Conde-Sánchez, A; González-Corrochano, B; Alonso-Azcárate, J; Uceda-Rodríguez, M; López, AB; Martínez-García, C; Cotes-Palomino, T |
| Title | Study of the synergistic impact of Fe3O4, Na2CO3 and organic C on kaolin-based lightweight aggregates by a DOE (Mixture Experiments) approach |
| Year | 2023 |
| Published | |
| Abstract | The compositional synergies involved in the thermal formation of lightweight aggregates (LWAs) have been investigated through four pure phases: non-expansive kaolin (K); cork powder (C); sodium carbonate (N) and magnetite-Fe3O4 (M). Mixture Experiments has been applied for formulation, modeling and optimization. LWAs have been manufactured from 36 starting mixtures and the main technological properties have been characterized: bloating index (BI), particle density (rho rd), water absorption (WA(24)) and crushing strength (S). Maximum BI and WA(24) together with minimum density are associated with the addition of a significant amount of iron phase in combination with small proportions of organic carbon (Optimal [BI > 60%]: 56.0% K + 40.2% M + 3.9% C + 0% N), while S increases antagonistically with expansion. Iron reduction by incomplete combustion of C appears to be critical in pore formation and concomitant bloating. N has enhanced the sphericity of the expanded specimens. The contrast between experimental and estimated data has shown that the models have generally performed very well. |
| https://doi.org/10.1016/j.conbuildmat.2023.133152 |
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