Valorization of phosphate by-products to produce acidic geopolymers
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 ad...
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| Language: | English |
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Consejo Superior de Investigaciones Científicas
2024-12-01
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| Series: | Materiales de Construccion |
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| Online Access: | https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/3909 |
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| author | S. En-naji S. Chhaiba S. Mabroum R. Hakkou I. Garcia Lodeiro |
| author_facet | S. En-naji S. Chhaiba S. Mabroum R. Hakkou I. Garcia Lodeiro |
| author_sort | S. En-naji |
| collection | DOAJ |
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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.
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| format | Article |
| id | doaj-art-fcb4c989c8a34e4e910794b5b6f129b0 |
| institution | Kabale University |
| issn | 0465-2746 1988-3226 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Consejo Superior de Investigaciones Científicas |
| record_format | Article |
| series | Materiales de Construccion |
| spelling | doaj-art-fcb4c989c8a34e4e910794b5b6f129b02025-01-24T12:13:46ZengConsejo Superior de Investigaciones CientíficasMateriales de Construccion0465-27461988-32262024-12-017435610.3989/mc.2024.390924Valorization of phosphate by-products to produce acidic geopolymersS. En-naji0S. Chhaiba1S. Mabroum2R. Hakkou3I. Garcia Lodeiro4Cadi Ayyad University (UCA), Faculty of Science and Technology, IMED-LabEduardo Torroja Institute (IETcc-CSIC), Department of MaterialsCadi Ayyad University (UCA), Faculty of Science and Technology, IMED-LabCadi Ayyad University (UCA), Faculty of Science and Technology, IMED-LabEduardo Torroja Institute (IETcc-CSIC), Department of Materials 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. https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/3909GeopolymersPhosphate miningPhosphoric acidRed clay |
| spellingShingle | S. En-naji S. Chhaiba S. Mabroum R. Hakkou I. Garcia Lodeiro Valorization of phosphate by-products to produce acidic geopolymers Materiales de Construccion Geopolymers Phosphate mining Phosphoric acid Red clay |
| title | Valorization of phosphate by-products to produce acidic geopolymers |
| title_full | Valorization of phosphate by-products to produce acidic geopolymers |
| title_fullStr | Valorization of phosphate by-products to produce acidic geopolymers |
| title_full_unstemmed | Valorization of phosphate by-products to produce acidic geopolymers |
| title_short | Valorization of phosphate by-products to produce acidic geopolymers |
| title_sort | valorization of phosphate by products to produce acidic geopolymers |
| topic | Geopolymers Phosphate mining Phosphoric acid Red clay |
| url | https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/3909 |
| work_keys_str_mv | AT sennaji valorizationofphosphatebyproductstoproduceacidicgeopolymers AT schhaiba valorizationofphosphatebyproductstoproduceacidicgeopolymers AT smabroum valorizationofphosphatebyproductstoproduceacidicgeopolymers AT rhakkou valorizationofphosphatebyproductstoproduceacidicgeopolymers AT igarcialodeiro valorizationofphosphatebyproductstoproduceacidicgeopolymers |