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Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials

Blast furnace slag (BFS)/sugar cane bagasse ash (SCBA) blends were assessed for the production of alkali-activated pastes and mortars. SCBA was collected from a lagoon in which wastes from a sugar cane industry were poured. After previous dry and grinding processes, SCBA was chemically characterized...

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Autores principales: Castaldelli, Vinícius N., Akasaki, Jorge L., Melges, José L.P., Tashima, Mauro M., Soriano, Lourdes, Borrachero, María V., Monzó, José, Payá, Jordi
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5521237/
https://www.ncbi.nlm.nih.gov/pubmed/28811425
http://dx.doi.org/10.3390/ma6083108
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author Castaldelli, Vinícius N.
Akasaki, Jorge L.
Melges, José L.P.
Tashima, Mauro M.
Soriano, Lourdes
Borrachero, María V.
Monzó, José
Payá, Jordi
author_facet Castaldelli, Vinícius N.
Akasaki, Jorge L.
Melges, José L.P.
Tashima, Mauro M.
Soriano, Lourdes
Borrachero, María V.
Monzó, José
Payá, Jordi
author_sort Castaldelli, Vinícius N.
collection PubMed
description Blast furnace slag (BFS)/sugar cane bagasse ash (SCBA) blends were assessed for the production of alkali-activated pastes and mortars. SCBA was collected from a lagoon in which wastes from a sugar cane industry were poured. After previous dry and grinding processes, SCBA was chemically characterized: it had a large percentage of organic matter (ca. 25%). Solutions of sodium hydroxide and sodium silicate were used as activating reagents. Different BFS/SCBA mixtures were studied, replacing part of the BFS by SCBA from 0 to 40% by weight. The mechanical strength of mortar was measured, obtaining values about 60 MPa of compressive strength for BFS/SCBA systems after 270 days of curing at 20 °C. Also, microstructural properties were assessed by means of SEM, TGA, XRD, pH, electrical conductivity, FTIR spectroscopy and MIP. Results showed a good stability of matrices developed by means of alkali-activation. It was demonstrated that sugar cane bagasse ash is an interesting source for preparing alkali-activated binders.
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spelling pubmed-55212372017-07-28 Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials Castaldelli, Vinícius N. Akasaki, Jorge L. Melges, José L.P. Tashima, Mauro M. Soriano, Lourdes Borrachero, María V. Monzó, José Payá, Jordi Materials (Basel) Article Blast furnace slag (BFS)/sugar cane bagasse ash (SCBA) blends were assessed for the production of alkali-activated pastes and mortars. SCBA was collected from a lagoon in which wastes from a sugar cane industry were poured. After previous dry and grinding processes, SCBA was chemically characterized: it had a large percentage of organic matter (ca. 25%). Solutions of sodium hydroxide and sodium silicate were used as activating reagents. Different BFS/SCBA mixtures were studied, replacing part of the BFS by SCBA from 0 to 40% by weight. The mechanical strength of mortar was measured, obtaining values about 60 MPa of compressive strength for BFS/SCBA systems after 270 days of curing at 20 °C. Also, microstructural properties were assessed by means of SEM, TGA, XRD, pH, electrical conductivity, FTIR spectroscopy and MIP. Results showed a good stability of matrices developed by means of alkali-activation. It was demonstrated that sugar cane bagasse ash is an interesting source for preparing alkali-activated binders. MDPI 2013-07-25 /pmc/articles/PMC5521237/ /pubmed/28811425 http://dx.doi.org/10.3390/ma6083108 Text en © 2013 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).
spellingShingle Article
Castaldelli, Vinícius N.
Akasaki, Jorge L.
Melges, José L.P.
Tashima, Mauro M.
Soriano, Lourdes
Borrachero, María V.
Monzó, José
Payá, Jordi
Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials
title Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials
title_full Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials
title_fullStr Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials
title_full_unstemmed Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials
title_short Use of Slag/Sugar Cane Bagasse Ash (SCBA) Blends in the Production of Alkali-Activated Materials
title_sort use of slag/sugar cane bagasse ash (scba) blends in the production of alkali-activated materials
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5521237/
https://www.ncbi.nlm.nih.gov/pubmed/28811425
http://dx.doi.org/10.3390/ma6083108
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