Acoustic Assessment of Multiscale Porous Lime-Cement Mortars

Noise pollution is an issue of high concern in urban environments and current standards and regulations trend to increase acoustic insulation requirements concerning airborne noise control. The design and development of novel building materials with enhanced acoustic performance is an efficient solu...

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Autores: Palomar Herrero, Irene|||0000-0003-2743-3618, Barluenga Badiola, Gonzalo|||0000-0002-2996-3412
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad de Alcalá (UAH)
Repositorio:e_Buah Biblioteca Digital Universidad de Alcalá
Idioma:inglés
OAI Identifier:oai:ebuah.uah.es:10017/55071
Acceso en línea:http://hdl.handle.net/10017/55071
https://dx.doi.org/10.3390/ma16010322
Access Level:acceso abierto
Palabra clave:Lime-cement mortar
Polymer fibers
Expanded clay
Perlite
Vermiculite
Airborne noise
Sound absorption
Sound insulation
Multiscale porosity mode
Arquitectura
Architecture
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spelling Acoustic Assessment of Multiscale Porous Lime-Cement MortarsPalomar Herrero, Irene|||0000-0003-2743-3618Barluenga Badiola, Gonzalo|||0000-0002-2996-3412Lime-cement mortarPolymer fibersExpanded clayPerliteVermiculiteAirborne noiseSound absorptionSound insulationMultiscale porosity modeArquitecturaArchitectureNoise pollution is an issue of high concern in urban environments and current standards and regulations trend to increase acoustic insulation requirements concerning airborne noise control. The design and development of novel building materials with enhanced acoustic performance is an efficient solution to mitigate this problem. Their application as renders and plasters can improve the acoustic conditions of existing and brand-new buildings. This paper reports the acoustic performance of eleven multiscale porous lime-cement mortars (MP-LCM) with two types of fibers (cellulose and polypropylene), gap-graded sand, and three lightweight aggregates (expanded clay, perlite, and vermiculite). Gap-graded sand was replaced by 25 and 50% of lightweight aggregates. A volume of 1.5% and 3% of cellulose fibers were added. The experimental study involved a physical characterization of properties related to mortar porous microstructure, such as apparent density, open porosity accessible to water, capillarity absorption, and water vapor permeability. Mechanical properties, such as Young?s modulus, compressibility modulus, and Poisson?s ratio were evaluated with ultrasonic pulse transmission tests. Acoustic properties, such as acoustic absorption coefficient and global index of airborne noise transmission, were measured using reduced-scale laboratory tests. The influence of mortar composition and the effects of mass, homogeneity, and stiffness on acoustic properties was assessed. Mortars with lower density, lower vapor permeability, larger open porosity, and higher Young?s and compressibility modulus showed an increase in sound insulation. The incorporation of lightweight aggregates increased sound insulation by up to 38% compared to the gap-graded sand reference mixture. Fibers slightly improved sound insulation, although a small fraction of cellulose fibers can quadruplicate noise absorption. The roughness of the exposed surface also affected sound transmission loss. A semi-quantitative multiscale model for acoustic performance, considering paste thickness, active void size, and connectivity of paste pores as key parameters, was proposed. It was observed that MP-LCM with enhanced sound insulation, slightly reduced sound absorption.Financial support for this research was provided by Comunidad de Madrid and the Universidad de Alcalá (Spain), as part of the project IndoorComfort (CM/JIN/2019-46) under the Research Program for the Promotion of Young Researchers20222022-12-29journal articlehttp://purl.org/coar/resource_type/c_6501NAhttp://purl.org/coar/version/c_be7fb7dd8ff6fe43info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10017/55071https://dx.doi.org/10.3390/ma16010322reponame:e_Buah Biblioteca Digital Universidad de Alcaláinstname:Universidad de Alcalá (UAH)InglésengComunidad de Madrid Not available CM%2FJIN%2F2019-46open accesshttp://purl.org/coar/access_right/c_abf2Attribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:ebuah.uah.es:10017/550712026-06-18T11:13:07Z
dc.title.none.fl_str_mv Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
title Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
spellingShingle Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
Palomar Herrero, Irene|||0000-0003-2743-3618
Lime-cement mortar
Polymer fibers
Expanded clay
Perlite
Vermiculite
Airborne noise
Sound absorption
Sound insulation
Multiscale porosity mode
Arquitectura
Architecture
title_short Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
title_full Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
title_fullStr Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
title_full_unstemmed Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
title_sort Acoustic Assessment of Multiscale Porous Lime-Cement Mortars
dc.creator.none.fl_str_mv Palomar Herrero, Irene|||0000-0003-2743-3618
Barluenga Badiola, Gonzalo|||0000-0002-2996-3412
author Palomar Herrero, Irene|||0000-0003-2743-3618
author_facet Palomar Herrero, Irene|||0000-0003-2743-3618
Barluenga Badiola, Gonzalo|||0000-0002-2996-3412
author_role author
author2 Barluenga Badiola, Gonzalo|||0000-0002-2996-3412
author2_role author
dc.subject.none.fl_str_mv Lime-cement mortar
Polymer fibers
Expanded clay
Perlite
Vermiculite
Airborne noise
Sound absorption
Sound insulation
Multiscale porosity mode
Arquitectura
Architecture
topic Lime-cement mortar
Polymer fibers
Expanded clay
Perlite
Vermiculite
Airborne noise
Sound absorption
Sound insulation
Multiscale porosity mode
Arquitectura
Architecture
description Noise pollution is an issue of high concern in urban environments and current standards and regulations trend to increase acoustic insulation requirements concerning airborne noise control. The design and development of novel building materials with enhanced acoustic performance is an efficient solution to mitigate this problem. Their application as renders and plasters can improve the acoustic conditions of existing and brand-new buildings. This paper reports the acoustic performance of eleven multiscale porous lime-cement mortars (MP-LCM) with two types of fibers (cellulose and polypropylene), gap-graded sand, and three lightweight aggregates (expanded clay, perlite, and vermiculite). Gap-graded sand was replaced by 25 and 50% of lightweight aggregates. A volume of 1.5% and 3% of cellulose fibers were added. The experimental study involved a physical characterization of properties related to mortar porous microstructure, such as apparent density, open porosity accessible to water, capillarity absorption, and water vapor permeability. Mechanical properties, such as Young?s modulus, compressibility modulus, and Poisson?s ratio were evaluated with ultrasonic pulse transmission tests. Acoustic properties, such as acoustic absorption coefficient and global index of airborne noise transmission, were measured using reduced-scale laboratory tests. The influence of mortar composition and the effects of mass, homogeneity, and stiffness on acoustic properties was assessed. Mortars with lower density, lower vapor permeability, larger open porosity, and higher Young?s and compressibility modulus showed an increase in sound insulation. The incorporation of lightweight aggregates increased sound insulation by up to 38% compared to the gap-graded sand reference mixture. Fibers slightly improved sound insulation, although a small fraction of cellulose fibers can quadruplicate noise absorption. The roughness of the exposed surface also affected sound transmission loss. A semi-quantitative multiscale model for acoustic performance, considering paste thickness, active void size, and connectivity of paste pores as key parameters, was proposed. It was observed that MP-LCM with enhanced sound insulation, slightly reduced sound absorption.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022-12-29
dc.type.none.fl_str_mv journal article
http://purl.org/coar/resource_type/c_6501
NA
http://purl.org/coar/version/c_be7fb7dd8ff6fe43
dc.type.openaire.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10017/55071
https://dx.doi.org/10.3390/ma16010322
url http://hdl.handle.net/10017/55071
https://dx.doi.org/10.3390/ma16010322
dc.language.none.fl_str_mv Inglés
eng
language_invalid_str_mv Inglés
language eng
dc.relation.none.fl_str_mv Comunidad de Madrid Not available CM%2FJIN%2F2019-46
dc.rights.none.fl_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
dc.rights.openaire.fl_str_mv info:eu-repo/semantics/openAccess
rights_invalid_str_mv open access
http://purl.org/coar/access_right/c_abf2
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:e_Buah Biblioteca Digital Universidad de Alcalá
instname:Universidad de Alcalá (UAH)
instname_str Universidad de Alcalá (UAH)
reponame_str e_Buah Biblioteca Digital Universidad de Alcalá
collection e_Buah Biblioteca Digital Universidad de Alcalá
repository.name.fl_str_mv
repository.mail.fl_str_mv
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