Optimisation of bio-based building materials using image analysis method
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://doi.org/10.1016/j.conbuildmat.2019.06.148 |
Resumo: | Wetting of bio-based mortars — the affinity of the biofibres and earth to the water — can have a strong impact on the flow, but the microscale physics and macroscopic consequences remain poorly understood, not helping in the material optimisation. This research analyses the influence of casting on biofibres dispersion in bio-based insulation materials at the macro-level and evaluate changes on hygrothermal behaviour if fibres and casting change. Earth-based blocks reinforced with 3% weight content of barley straw, hemp shiv and rice husk fibres were produced with 5 and 4 cm thickness using two casting methods. The 5 cm blocks were unstabilised and compacted; the 4 cm blocks were moulded and stabilised with gypsum and air lime. The approach is to implement a developed method of image analysis to elucidate the inherently 2D pore-scale mechanisms and help explain the striking macroscopic displacement patterns that emerge. The results indicate that production variables have a significant directionally dependent impact on the physical properties of cast bio-based materials. This means that the Image analysis can be used for quality control towards the optimisation of the bio-composites. Thermal conductivity and ultra sound velocity are affected by fibres distribution inside bio-based materials. The shape of ultra sound distribution from direct and indirect methods enhance the anisotropy of the bio-based materials with different composition and casting methods. |
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7160 |
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Optimisation of bio-based building materials using image analysis methodBio-based compositeCastingEarth blockEnergy efficiencyImage analysisNatural fibreCivil and Structural EngineeringBuilding and ConstructionMaterials Science(all)SDG 7 - Affordable and Clean EnergyWetting of bio-based mortars — the affinity of the biofibres and earth to the water — can have a strong impact on the flow, but the microscale physics and macroscopic consequences remain poorly understood, not helping in the material optimisation. This research analyses the influence of casting on biofibres dispersion in bio-based insulation materials at the macro-level and evaluate changes on hygrothermal behaviour if fibres and casting change. Earth-based blocks reinforced with 3% weight content of barley straw, hemp shiv and rice husk fibres were produced with 5 and 4 cm thickness using two casting methods. The 5 cm blocks were unstabilised and compacted; the 4 cm blocks were moulded and stabilised with gypsum and air lime. The approach is to implement a developed method of image analysis to elucidate the inherently 2D pore-scale mechanisms and help explain the striking macroscopic displacement patterns that emerge. The results indicate that production variables have a significant directionally dependent impact on the physical properties of cast bio-based materials. This means that the Image analysis can be used for quality control towards the optimisation of the bio-composites. Thermal conductivity and ultra sound velocity are affected by fibres distribution inside bio-based materials. The shape of ultra sound distribution from direct and indirect methods enhance the anisotropy of the bio-based materials with different composition and casting methods.DEC - Departamento de Engenharia CivilCERIS - Polo NOVARUNBrás, AnaAntunes, AnaLaborel-Préneron, AurélieRalegaonkar, RahulShaw, AndyRiley, MikeFaria, Paulina2023-03-03T01:32:12Z2019-10-302019-10-30T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article10application/pdfhttps://doi.org/10.1016/j.conbuildmat.2019.06.148eng0950-0618PURE: 14167325http://www.scopus.com/inward/record.url?scp=85068575857&partnerID=8YFLogxKhttps://doi.org/10.1016/j.conbuildmat.2019.06.148info: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:RCAAP2024-03-11T04:36:24Zoai:run.unl.pt:10362/81693Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:36:07.819389Repositório 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 |
Optimisation of bio-based building materials using image analysis method |
title |
Optimisation of bio-based building materials using image analysis method |
spellingShingle |
Optimisation of bio-based building materials using image analysis method Brás, Ana Bio-based composite Casting Earth block Energy efficiency Image analysis Natural fibre Civil and Structural Engineering Building and Construction Materials Science(all) SDG 7 - Affordable and Clean Energy |
title_short |
Optimisation of bio-based building materials using image analysis method |
title_full |
Optimisation of bio-based building materials using image analysis method |
title_fullStr |
Optimisation of bio-based building materials using image analysis method |
title_full_unstemmed |
Optimisation of bio-based building materials using image analysis method |
title_sort |
Optimisation of bio-based building materials using image analysis method |
author |
Brás, Ana |
author_facet |
Brás, Ana Antunes, Ana Laborel-Préneron, Aurélie Ralegaonkar, Rahul Shaw, Andy Riley, Mike Faria, Paulina |
author_role |
author |
author2 |
Antunes, Ana Laborel-Préneron, Aurélie Ralegaonkar, Rahul Shaw, Andy Riley, Mike Faria, Paulina |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
DEC - Departamento de Engenharia Civil CERIS - Polo NOVA RUN |
dc.contributor.author.fl_str_mv |
Brás, Ana Antunes, Ana Laborel-Préneron, Aurélie Ralegaonkar, Rahul Shaw, Andy Riley, Mike Faria, Paulina |
dc.subject.por.fl_str_mv |
Bio-based composite Casting Earth block Energy efficiency Image analysis Natural fibre Civil and Structural Engineering Building and Construction Materials Science(all) SDG 7 - Affordable and Clean Energy |
topic |
Bio-based composite Casting Earth block Energy efficiency Image analysis Natural fibre Civil and Structural Engineering Building and Construction Materials Science(all) SDG 7 - Affordable and Clean Energy |
description |
Wetting of bio-based mortars — the affinity of the biofibres and earth to the water — can have a strong impact on the flow, but the microscale physics and macroscopic consequences remain poorly understood, not helping in the material optimisation. This research analyses the influence of casting on biofibres dispersion in bio-based insulation materials at the macro-level and evaluate changes on hygrothermal behaviour if fibres and casting change. Earth-based blocks reinforced with 3% weight content of barley straw, hemp shiv and rice husk fibres were produced with 5 and 4 cm thickness using two casting methods. The 5 cm blocks were unstabilised and compacted; the 4 cm blocks were moulded and stabilised with gypsum and air lime. The approach is to implement a developed method of image analysis to elucidate the inherently 2D pore-scale mechanisms and help explain the striking macroscopic displacement patterns that emerge. The results indicate that production variables have a significant directionally dependent impact on the physical properties of cast bio-based materials. This means that the Image analysis can be used for quality control towards the optimisation of the bio-composites. Thermal conductivity and ultra sound velocity are affected by fibres distribution inside bio-based materials. The shape of ultra sound distribution from direct and indirect methods enhance the anisotropy of the bio-based materials with different composition and casting methods. |
publishDate |
2019 |
dc.date.none.fl_str_mv |
2019-10-30 2019-10-30T00:00:00Z 2023-03-03T01:32:12Z |
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://doi.org/10.1016/j.conbuildmat.2019.06.148 |
url |
https://doi.org/10.1016/j.conbuildmat.2019.06.148 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0950-0618 PURE: 14167325 http://www.scopus.com/inward/record.url?scp=85068575857&partnerID=8YFLogxK https://doi.org/10.1016/j.conbuildmat.2019.06.148 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
10 application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137980634365952 |