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Waste-Based One-Part Alkali Activated Materials
Ordinary Portland Cement is the most widely used binder in the construction sector; however, a very high carbon footprint is associated with its production process. Consequently, more sustainable alternative construction materials are being investigated, namely, one-part alkali activated materials (...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8198906/ https://www.ncbi.nlm.nih.gov/pubmed/34071507 http://dx.doi.org/10.3390/ma14112911 |
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author | Gonçalves, Margarida Vilarinho, Inês Silveirinha Capela, Marinélia Caetano, Ana Novais, Rui Miguel Labrincha, João António Seabra, Maria Paula |
author_facet | Gonçalves, Margarida Vilarinho, Inês Silveirinha Capela, Marinélia Caetano, Ana Novais, Rui Miguel Labrincha, João António Seabra, Maria Paula |
author_sort | Gonçalves, Margarida |
collection | PubMed |
description | Ordinary Portland Cement is the most widely used binder in the construction sector; however, a very high carbon footprint is associated with its production process. Consequently, more sustainable alternative construction materials are being investigated, namely, one-part alkali activated materials (AAMs). In this work, waste-based one-part AAMs binders were developed using only a blast furnace slag, as the solid precursor, and sodium metasilicate, as the solid activator. For the first time, mortars in which the commercial sand was replaced by two exhausted sands from biomass boilers (CA and CT) were developed. Firstly, the characterization of the slag and sands (aggregates) was performed. After, the AAMs fresh and hardened state properties were evaluated, being the characterization complemented by FTIR and microstructural analysis. The binder and the mortars prepared with commercial sand presented high compressive strength values after 28 days of curing-56 MPa and 79 MPa, respectively. The mortars developed with exhausted sands exhibit outstanding compressive strength values, 86 and 70 MPa for CT and CA, respectively, and the other material’s properties were not affected. Consequently, this work proved that high compressive strength waste-based one-part AAMs mortars can be produced and that it is feasible to use another waste as aggregate in the mortar’s formulations: the exhausted sands from biomass boilers. |
format | Online Article Text |
id | pubmed-8198906 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-81989062021-06-14 Waste-Based One-Part Alkali Activated Materials Gonçalves, Margarida Vilarinho, Inês Silveirinha Capela, Marinélia Caetano, Ana Novais, Rui Miguel Labrincha, João António Seabra, Maria Paula Materials (Basel) Article Ordinary Portland Cement is the most widely used binder in the construction sector; however, a very high carbon footprint is associated with its production process. Consequently, more sustainable alternative construction materials are being investigated, namely, one-part alkali activated materials (AAMs). In this work, waste-based one-part AAMs binders were developed using only a blast furnace slag, as the solid precursor, and sodium metasilicate, as the solid activator. For the first time, mortars in which the commercial sand was replaced by two exhausted sands from biomass boilers (CA and CT) were developed. Firstly, the characterization of the slag and sands (aggregates) was performed. After, the AAMs fresh and hardened state properties were evaluated, being the characterization complemented by FTIR and microstructural analysis. The binder and the mortars prepared with commercial sand presented high compressive strength values after 28 days of curing-56 MPa and 79 MPa, respectively. The mortars developed with exhausted sands exhibit outstanding compressive strength values, 86 and 70 MPa for CT and CA, respectively, and the other material’s properties were not affected. Consequently, this work proved that high compressive strength waste-based one-part AAMs mortars can be produced and that it is feasible to use another waste as aggregate in the mortar’s formulations: the exhausted sands from biomass boilers. MDPI 2021-05-28 /pmc/articles/PMC8198906/ /pubmed/34071507 http://dx.doi.org/10.3390/ma14112911 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Gonçalves, Margarida Vilarinho, Inês Silveirinha Capela, Marinélia Caetano, Ana Novais, Rui Miguel Labrincha, João António Seabra, Maria Paula Waste-Based One-Part Alkali Activated Materials |
title | Waste-Based One-Part Alkali Activated Materials |
title_full | Waste-Based One-Part Alkali Activated Materials |
title_fullStr | Waste-Based One-Part Alkali Activated Materials |
title_full_unstemmed | Waste-Based One-Part Alkali Activated Materials |
title_short | Waste-Based One-Part Alkali Activated Materials |
title_sort | waste-based one-part alkali activated materials |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8198906/ https://www.ncbi.nlm.nih.gov/pubmed/34071507 http://dx.doi.org/10.3390/ma14112911 |
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