Academic Journal
Valorization of phosphate by-products to produce acidic geopolymers
| العنوان: | Valorization of phosphate by-products to produce acidic geopolymers |
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| المؤلفون: | S. En-naji, S. Chhaiba, S. Mabroum, R. Hakkou, I. Garcia Lodeiro |
| المصدر: | Materiales de Construccion, Vol 74, Iss 356 (2024) |
| بيانات النشر: | Consejo Superior de Investigaciones Científicas, 2024. |
| سنة النشر: | 2024 |
| المجموعة: | LCC:Materials of engineering and construction. Mechanics of materials |
| مصطلحات موضوعية: | Geopolymers, Phosphate mining, Phosphoric acid, Red clay, Materials of engineering and construction. Mechanics of materials, TA401-492 |
| الوصف: | The present study evaluates the possibility of using a by-product of phosphate mines, such as red clay, as a precursor for the elaboration of acid geopolymers, using H3PO4 phosphoric acid (5M and 8M) as an activator. Considering the chemical composition of the clay, sodium aluminate (NaAlO2) was added as an aluminum corrector. To increase the reactivity of the precursor, the clay was thermally treated at 900°C for 2 hours. Pastes were prepared and characterized from the mechanical (compressive strengths), microstructural (BSEM/EDX and MIP), mineralogical (XRD and FTIR), and nanostructural (27Al, 29Si and 31P MAS NMR) point of view. The results showed that the type of reaction products is highly dependent on the chemical composition of the precursor and the acidic conditions. In addition, the presence of sodium aluminate improves the mechanical strengths in systems activated with 8M H3PO4. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English Spanish; Castilian |
| تدمد: | 0465-2746 1988-3226 |
| Relation: | https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/3909; https://doaj.org/toc/0465-2746; https://doaj.org/toc/1988-3226 |
| DOI: | 10.3989/mc.2024.390924 |
| URL الوصول: | https://doaj.org/article/fcb4c989c8a34e4e910794b5b6f129b0 |
| رقم الانضمام: | edsdoj.fcb4c989c8a34e4e910794b5b6f129b0 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 04652746 19883226 |
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| DOI: | 10.3989/mc.2024.390924 |