Optimum use of sugar cane straw ash (SCSA) in alkali-activated binders based on blast furnace slag (BFS)

[EN] Alkali-activated binders (AABs) are a material obtained from the combination of a solid precursor and an alkaline activating solution. In this study, one solid precursor used was blast-furnace slag (BFS) and the other was an agro waste: sugar cane straw ash (SCSA). Sodium hydroxide was used for...

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Detalles Bibliográficos
Autores: Moraes, J.C.B, Melges, J.L.P., Akasaki, J.L., Mitsuuchi Tashima, Mauro|||0000-0003-0885-9293, Monzó Balbuena, José Mª|||0000-0002-3657-3076, Borrachero Rosado, María Victoria|||0000-0002-7873-0658, Soriano Martinez, Lourdes|||0000-0002-5749-4609, Paya Bernabeu, Jorge Juan|||0000-0001-7425-5311
Tipo de recurso: artículo
Fecha de publicación:2018
País:España
Institución:Universitat Politècnica de València (UPV)
Repositorio:RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia
Idioma:inglés
OAI Identifier:oai:riunet.upv.es:10251/145534
Acceso en línea:https://riunet.upv.es/handle/10251/145534
Access Level:acceso abierto
Palabra clave:Agro waste
Optimum replacement
Microstructural studies
Compressive strength.
INGENIERIA DE LA CONSTRUCCION
Descripción
Sumario:[EN] Alkali-activated binders (AABs) are a material obtained from the combination of a solid precursor and an alkaline activating solution. In this study, one solid precursor used was blast-furnace slag (BFS) and the other was an agro waste: sugar cane straw ash (SCSA). Sodium hydroxide was used for preparing activating solutions. In order to reach the potential reactivity of the SCSA, a study varying the BFS/SCSA mass ratio and H2O=Na2O molar ratio was carried out. The BFS/SCSA ratio varied from 100=0 to 70=30, and H2O=Na2O was studied in the range of 11.1¿18.5. To fulfill this objective, specimens were assessed by their compressive strength of mortars and microstructural studies of pastes [X-ray diffraction (XRD); thermogravimetric analysis (TGA); Fourier transform infrared spectroscopy (FTIR); and field emission scanning electron microscopy (FESEM)] in the curing time range of 3¿90 days at 25°C. Results from these tests showed that the best BFS/SCSA and H2O=Na2O ratios were 70=30 and 18.5, respectively. This study revealed an interesting valorization of the SCSA as a complementary precursor in BFS-based AABs because of the improvement of mechanical properties and the reduction in the consumption of BFS in AAB

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