The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications

The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications

Life cycle assessment (LCA) provides a comprehensive framework for positioning low energy and global warming potential alternatives regarding Portland cement and concrete. Published LCA work on alkali-activated cements is, however, relatively limited. In this paper, we illustrate how LCA critically...

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Main Authors: Silva, Maristela Gomes da, Gomes, Vanessa
Format: Online
Jezik:por
Izdano: ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2018
Online dostop:https://seer.ufrgs.br/ambienteconstruido/article/view/69657
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spelling ojs-article-696572019-01-08T18:41:31Z The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications Silva, Maristela Gomes da Gomes, Vanessa concrete; blast furnace slag; breakwater structures; performance; LCA Life cycle assessment (LCA) provides a comprehensive framework for positioning low energy and global warming potential alternatives regarding Portland cement and concrete. Published LCA work on alkali-activated cements is, however, relatively limited. In this paper, we illustrate how LCA critically supports concrete technological studies in the search for low impact concrete mixes. Previous research on breakwater applications explored replacing a low-clinker Portland cement and natural aggregates with seven different alkali-activated blast furnace slag (bfs) binder systems and with coarse and granulated bfs aggregates. Its outcome suggested a sodium silicate-activated bfs formulation as the best match between concrete properties and environmental regulation compliance. To validate this outcome through LCA, our cradle to gate assessments followed ISO 14044 (INTERNATIONAL…, 2006b) and used Ecoinvent v.2.2 and CML baseline 2001 v.2.05. We adopted the ‘net avoided burden approach’ to handle multifunctionality intrinsic to by-product-based AAC. Whilst sodium silicate-activated mixes rivaled the reference regarding GWP, impacts in several categories were increased. LCA highlighted the implications of driving mix selection by focusing on a single environmental impact category. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído CNPq FAPESP FINEP ArcelorMittal Tubarão (AMT) 2018-06-06 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://seer.ufrgs.br/ambienteconstruido/article/view/69657 Ambiente Construído; v. 18, n. 2 (2018): Edição especial sobre Tecnologia das Argamassas; 413-429 Ambiente Construído; v. 18, n. 2 (2018): Edição especial sobre Tecnologia das Argamassas; 413-429 Ambiente Construído; v. 18, n. 2 (2018): Edição especial sobre Tecnologia das Argamassas; 413-429 1678-8621 1415-8876 por https://seer.ufrgs.br/ambienteconstruido/article/view/69657/48364 Direitos autorais 2018 Ambiente Construído https://creativecommons.org/licenses/by/4.0
institution Universidade Federal do Rio Grande do Sul
collection OJS
language por
format Online
author Silva, Maristela Gomes da
Gomes, Vanessa
spellingShingle Silva, Maristela Gomes da
Gomes, Vanessa
The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications
author_facet Silva, Maristela Gomes da
Gomes, Vanessa
author_sort Silva, Maristela Gomes da
title The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications
title_short The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications
title_full The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications
title_fullStr The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications
title_full_unstemmed The contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications
title_sort contribution of life-cycle assessment to environmentally preferable concrete mix selection for breakwater applications
description Life cycle assessment (LCA) provides a comprehensive framework for positioning low energy and global warming potential alternatives regarding Portland cement and concrete. Published LCA work on alkali-activated cements is, however, relatively limited. In this paper, we illustrate how LCA critically supports concrete technological studies in the search for low impact concrete mixes. Previous research on breakwater applications explored replacing a low-clinker Portland cement and natural aggregates with seven different alkali-activated blast furnace slag (bfs) binder systems and with coarse and granulated bfs aggregates. Its outcome suggested a sodium silicate-activated bfs formulation as the best match between concrete properties and environmental regulation compliance. To validate this outcome through LCA, our cradle to gate assessments followed ISO 14044 (INTERNATIONAL…, 2006b) and used Ecoinvent v.2.2 and CML baseline 2001 v.2.05. We adopted the ‘net avoided burden approach’ to handle multifunctionality intrinsic to by-product-based AAC. Whilst sodium silicate-activated mixes rivaled the reference regarding GWP, impacts in several categories were increased. LCA highlighted the implications of driving mix selection by focusing on a single environmental impact category.
publisher ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate 2018
url https://seer.ufrgs.br/ambienteconstruido/article/view/69657
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