Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/77973 |
Resumo: | Steel slag is a byproduct generated as waste during the steelmaking process and can be considered a cost‐effective and environmentally acceptable alternative to replace natural aggre-gates. Using steel slag aggregates (SSA) to produce asphalt mixtures promotes sustainability and circular economy principles by using an industrial byproduct as a raw material. Thus, this work mainly aims to design more sustainable asphalt mixtures with high amounts of SSA that fit the circular economy expectations. This work developed two asphalt mixtures with SSA for surface (AC 14 surf) and binder/base (AC 20 bin/base) courses. Initially, the excellent wearing and polishing resistance of SSA and their good affinity with bitumen demonstrated the potential of this byproduct to be used in asphalt mixtures. Then, when analyzing the influence of using two different SSA incorporation rates (50% and a percentage close to 100%) in both asphalt mixtures, it was concluded that the use of SSA should be limited to 75% to avoid excessive air void contents and durability problems. The importance of considering the different particle densities of SSA and natural aggregates was highlighted during the mix design by defining a relationship between an effective and equivalent binder content. Finally, the mechanical performance of AC 14 and AC 20 with 75% SSA incorporation was compared to identical conventional mixtures produced with natural granite ag-gregates. The results obtained showed that the asphalt mixtures with 75% SSA have some worka-bility problems due to the rough and porous surface of SSA. However, they present an excellent water sensitivity and permanent deformation resistance, surpassing the performance of the conventional asphalt mixtures. |
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Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixturesAsphalt pavementsCircular economyMechanical performanceMix designSteel slag aggregates (SSA)Engenharia e Tecnologia::Engenharia CivilScience & TechnologySteel slag is a byproduct generated as waste during the steelmaking process and can be considered a cost‐effective and environmentally acceptable alternative to replace natural aggre-gates. Using steel slag aggregates (SSA) to produce asphalt mixtures promotes sustainability and circular economy principles by using an industrial byproduct as a raw material. Thus, this work mainly aims to design more sustainable asphalt mixtures with high amounts of SSA that fit the circular economy expectations. This work developed two asphalt mixtures with SSA for surface (AC 14 surf) and binder/base (AC 20 bin/base) courses. Initially, the excellent wearing and polishing resistance of SSA and their good affinity with bitumen demonstrated the potential of this byproduct to be used in asphalt mixtures. Then, when analyzing the influence of using two different SSA incorporation rates (50% and a percentage close to 100%) in both asphalt mixtures, it was concluded that the use of SSA should be limited to 75% to avoid excessive air void contents and durability problems. The importance of considering the different particle densities of SSA and natural aggregates was highlighted during the mix design by defining a relationship between an effective and equivalent binder content. Finally, the mechanical performance of AC 14 and AC 20 with 75% SSA incorporation was compared to identical conventional mixtures produced with natural granite ag-gregates. The results obtained showed that the asphalt mixtures with 75% SSA have some worka-bility problems due to the rough and porous surface of SSA. However, they present an excellent water sensitivity and permanent deformation resistance, surpassing the performance of the conventional asphalt mixtures.This research was funded by the PORTUGAL 2020 Partnership Agreement through the Competitiveness and Internationalization Operational Program (POCI) and the European Regional Development Fund (ERDF), under the R&D Project “RENEw—Construction waste for a circular economy”, with reference POCI-01-0247-FEDER-033834.MDPIUniversidade do MinhoMoura, CarolineNascimento, LucasLoureiro, CarlosRodrigues, MafaldaOliveira, Joel R. M.Silva, Hugo M. R. D.2022-01-012022-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/77973engMoura, C.; Nascimento, L.; Loureiro, C.; Rodrigues, M.; Oliveira, J.; Silva, H. Viability of Using High Amounts of Steel Slag Aggregates to Improve the Circularity and Performance of Asphalt Mixtures. Appl. Sci. 2022, 12, 490. https://doi.org/10.3390/app1201049010.3390/app12010490https://www.mdpi.com/2076-3417/12/1/490info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-07-21T12:22:41Zoai:repositorium.sdum.uminho.pt:1822/77973Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T19:16:12.495198Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures |
title |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures |
spellingShingle |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures Moura, Caroline Asphalt pavements Circular economy Mechanical performance Mix design Steel slag aggregates (SSA) Engenharia e Tecnologia::Engenharia Civil Science & Technology |
title_short |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures |
title_full |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures |
title_fullStr |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures |
title_full_unstemmed |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures |
title_sort |
Viability of using high amounts of steel slag aggregates to improve the circularity and performance of asphalt mixtures |
author |
Moura, Caroline |
author_facet |
Moura, Caroline Nascimento, Lucas Loureiro, Carlos Rodrigues, Mafalda Oliveira, Joel R. M. Silva, Hugo M. R. D. |
author_role |
author |
author2 |
Nascimento, Lucas Loureiro, Carlos Rodrigues, Mafalda Oliveira, Joel R. M. Silva, Hugo M. R. D. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Moura, Caroline Nascimento, Lucas Loureiro, Carlos Rodrigues, Mafalda Oliveira, Joel R. M. Silva, Hugo M. R. D. |
dc.subject.por.fl_str_mv |
Asphalt pavements Circular economy Mechanical performance Mix design Steel slag aggregates (SSA) Engenharia e Tecnologia::Engenharia Civil Science & Technology |
topic |
Asphalt pavements Circular economy Mechanical performance Mix design Steel slag aggregates (SSA) Engenharia e Tecnologia::Engenharia Civil Science & Technology |
description |
Steel slag is a byproduct generated as waste during the steelmaking process and can be considered a cost‐effective and environmentally acceptable alternative to replace natural aggre-gates. Using steel slag aggregates (SSA) to produce asphalt mixtures promotes sustainability and circular economy principles by using an industrial byproduct as a raw material. Thus, this work mainly aims to design more sustainable asphalt mixtures with high amounts of SSA that fit the circular economy expectations. This work developed two asphalt mixtures with SSA for surface (AC 14 surf) and binder/base (AC 20 bin/base) courses. Initially, the excellent wearing and polishing resistance of SSA and their good affinity with bitumen demonstrated the potential of this byproduct to be used in asphalt mixtures. Then, when analyzing the influence of using two different SSA incorporation rates (50% and a percentage close to 100%) in both asphalt mixtures, it was concluded that the use of SSA should be limited to 75% to avoid excessive air void contents and durability problems. The importance of considering the different particle densities of SSA and natural aggregates was highlighted during the mix design by defining a relationship between an effective and equivalent binder content. Finally, the mechanical performance of AC 14 and AC 20 with 75% SSA incorporation was compared to identical conventional mixtures produced with natural granite ag-gregates. The results obtained showed that the asphalt mixtures with 75% SSA have some worka-bility problems due to the rough and porous surface of SSA. However, they present an excellent water sensitivity and permanent deformation resistance, surpassing the performance of the conventional asphalt mixtures. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-01-01 2022-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/1822/77973 |
url |
https://hdl.handle.net/1822/77973 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Moura, C.; Nascimento, L.; Loureiro, C.; Rodrigues, M.; Oliveira, J.; Silva, H. Viability of Using High Amounts of Steel Slag Aggregates to Improve the Circularity and Performance of Asphalt Mixtures. Appl. Sci. 2022, 12, 490. https://doi.org/10.3390/app12010490 10.3390/app12010490 https://www.mdpi.com/2076-3417/12/1/490 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
MDPI |
publisher.none.fl_str_mv |
MDPI |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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