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Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction

Fly ash has been widely used as a cement substitute to improve the sustainability of concrete. Although the advantages of fly ash have been extensively documented, there is a gap in understanding why its use in mass concrete applications remains low in some countries, such as the Philippines. Thus,...

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Autores principales: Orozco, Christian, Tangtermsirikul, Somnuk, Sugiyama, Takafumi, Babel, Sandhya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10600155/
https://www.ncbi.nlm.nih.gov/pubmed/37880405
http://dx.doi.org/10.1038/s41598-023-45632-z
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author Orozco, Christian
Tangtermsirikul, Somnuk
Sugiyama, Takafumi
Babel, Sandhya
author_facet Orozco, Christian
Tangtermsirikul, Somnuk
Sugiyama, Takafumi
Babel, Sandhya
author_sort Orozco, Christian
collection PubMed
description Fly ash has been widely used as a cement substitute to improve the sustainability of concrete. Although the advantages of fly ash have been extensively documented, there is a gap in understanding why its use in mass concrete applications remains low in some countries, such as the Philippines. Thus, this work aims to understand the issues that impede waste utilization, particularly fly ash in the concrete construction industry, quantify the impact of the current practice, and identify opportunities for sustainable fly ash utilization. Endpoint impact analysis was conducted through the life cycle using SimaPro 9.3 to quantify the impacts on human health, ecosystem, and resources of 31 concrete mixtures of low, normal, and high strength design with 0 to 20% fly ash as cement replacement. In-depth, semi-structured interviews with key stakeholders were undertaken to determine the institutional, economic, social, and technological challenges related to the utilization of waste materials in large-scale concrete construction. More than 90% of the total impact of concrete contributes to damage to human health, primarily caused by global warming and fine particulate matter. The use of fly ash at 20% replacement by weight of cement benefits resources more significantly than human health and the ecosystem. The use of chemical admixture to improve strength has a significant impact on resources. High fly ash replacement for normal and high-strength concrete has a greater reduction in all endpoint categories than for low-strength design. Recommendations are proposed to maximize the beneficial impact of using fly ash in the concrete industry.
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spelling pubmed-106001552023-10-27 Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction Orozco, Christian Tangtermsirikul, Somnuk Sugiyama, Takafumi Babel, Sandhya Sci Rep Article Fly ash has been widely used as a cement substitute to improve the sustainability of concrete. Although the advantages of fly ash have been extensively documented, there is a gap in understanding why its use in mass concrete applications remains low in some countries, such as the Philippines. Thus, this work aims to understand the issues that impede waste utilization, particularly fly ash in the concrete construction industry, quantify the impact of the current practice, and identify opportunities for sustainable fly ash utilization. Endpoint impact analysis was conducted through the life cycle using SimaPro 9.3 to quantify the impacts on human health, ecosystem, and resources of 31 concrete mixtures of low, normal, and high strength design with 0 to 20% fly ash as cement replacement. In-depth, semi-structured interviews with key stakeholders were undertaken to determine the institutional, economic, social, and technological challenges related to the utilization of waste materials in large-scale concrete construction. More than 90% of the total impact of concrete contributes to damage to human health, primarily caused by global warming and fine particulate matter. The use of fly ash at 20% replacement by weight of cement benefits resources more significantly than human health and the ecosystem. The use of chemical admixture to improve strength has a significant impact on resources. High fly ash replacement for normal and high-strength concrete has a greater reduction in all endpoint categories than for low-strength design. Recommendations are proposed to maximize the beneficial impact of using fly ash in the concrete industry. Nature Publishing Group UK 2023-10-25 /pmc/articles/PMC10600155/ /pubmed/37880405 http://dx.doi.org/10.1038/s41598-023-45632-z Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Orozco, Christian
Tangtermsirikul, Somnuk
Sugiyama, Takafumi
Babel, Sandhya
Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction
title Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction
title_full Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction
title_fullStr Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction
title_full_unstemmed Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction
title_short Examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction
title_sort examining the endpoint impacts, challenges, and opportunities of fly ash utilization for sustainable concrete construction
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10600155/
https://www.ncbi.nlm.nih.gov/pubmed/37880405
http://dx.doi.org/10.1038/s41598-023-45632-z
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