Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies
This work studies the possibility of using geopolymer materials to enhance the mechanical and durability properties of hydrated lime–pozzolan mixtures, which gave rise to the so-called “hybrid systems”. Two different waste types were used as pozzolan in the lime–pozzolan system: rice husk ash (RHA)...
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| Language: | English |
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MDPI AG
2022-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/15/8/2736 |
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| author | Ariel Rey Villca Lourdes Soriano María Victoria Borrachero Jordi Payá José María Monzó Mauro Mitsuuchi Tashima |
| author_facet | Ariel Rey Villca Lourdes Soriano María Victoria Borrachero Jordi Payá José María Monzó Mauro Mitsuuchi Tashima |
| author_sort | Ariel Rey Villca |
| collection | DOAJ |
| description | This work studies the possibility of using geopolymer materials to enhance the mechanical and durability properties of hydrated lime–pozzolan mixtures, which gave rise to the so-called “hybrid systems”. Two different waste types were used as pozzolan in the lime–pozzolan system: rice husk ash (RHA) and spent fluid catalytic cracking (FCC). The geopolymer fabricated with FCC was activated with commercial reagents (NaOH and Na<sub>2</sub>SiO<sub>3</sub>), and also with alternative sources of silica to obtain a lower carbon footprint in these mixtures. The alternative silica sources were RHA and residual diatomaceous earth (RDE) from the beer industry. The geopolymer mixture substituted the lime–pozzolan mixture for 30% replacement in weight. The hybrid systems showed better mechanical strengths for the short and medium curing ages in relation to the lime–pozzolan mixtures. Thermogravimetric analyses were performed to characterise the types of products formed in these mixtures. In the durability studies, hybrid systems better performed in freeze–thaw cycles and obtained lower capillarity water absorption values. |
| first_indexed | 2024-03-09T10:32:32Z |
| format | Article |
| id | doaj.art-e2db01a9becb47a6abe449a0333c26aa |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-09T10:32:32Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-e2db01a9becb47a6abe449a0333c26aa2023-12-01T21:10:29ZengMDPI AGMaterials1996-19442022-04-01158273610.3390/ma15082736Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability StudiesAriel Rey Villca0Lourdes Soriano1María Victoria Borrachero2Jordi Payá3José María Monzó4Mauro Mitsuuchi Tashima5Institute of Concrete Science and Technology (ICITECH), Universitat Politècnica de València, 46022 Valencia, SpainInstitute of Concrete Science and Technology (ICITECH), Universitat Politècnica de València, 46022 Valencia, SpainInstitute of Concrete Science and Technology (ICITECH), Universitat Politècnica de València, 46022 Valencia, SpainInstitute of Concrete Science and Technology (ICITECH), Universitat Politècnica de València, 46022 Valencia, SpainInstitute of Concrete Science and Technology (ICITECH), Universitat Politècnica de València, 46022 Valencia, SpainInstitute of Concrete Science and Technology (ICITECH), Universitat Politècnica de València, 46022 Valencia, SpainThis work studies the possibility of using geopolymer materials to enhance the mechanical and durability properties of hydrated lime–pozzolan mixtures, which gave rise to the so-called “hybrid systems”. Two different waste types were used as pozzolan in the lime–pozzolan system: rice husk ash (RHA) and spent fluid catalytic cracking (FCC). The geopolymer fabricated with FCC was activated with commercial reagents (NaOH and Na<sub>2</sub>SiO<sub>3</sub>), and also with alternative sources of silica to obtain a lower carbon footprint in these mixtures. The alternative silica sources were RHA and residual diatomaceous earth (RDE) from the beer industry. The geopolymer mixture substituted the lime–pozzolan mixture for 30% replacement in weight. The hybrid systems showed better mechanical strengths for the short and medium curing ages in relation to the lime–pozzolan mixtures. Thermogravimetric analyses were performed to characterise the types of products formed in these mixtures. In the durability studies, hybrid systems better performed in freeze–thaw cycles and obtained lower capillarity water absorption values.https://www.mdpi.com/1996-1944/15/8/2736hydrated limepozzolangeopolymermortarfreeze–thaw cycleswater absorption |
| spellingShingle | Ariel Rey Villca Lourdes Soriano María Victoria Borrachero Jordi Payá José María Monzó Mauro Mitsuuchi Tashima Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies Materials hydrated lime pozzolan geopolymer mortar freeze–thaw cycles water absorption |
| title | Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies |
| title_full | Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies |
| title_fullStr | Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies |
| title_full_unstemmed | Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies |
| title_short | Hybrid Lime–Pozzolan Geopolymer Systems: Microstructural, Mechanical and Durability Studies |
| title_sort | hybrid lime pozzolan geopolymer systems microstructural mechanical and durability studies |
| topic | hydrated lime pozzolan geopolymer mortar freeze–thaw cycles water absorption |
| url | https://www.mdpi.com/1996-1944/15/8/2736 |
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