Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites

Lightweight gypsum composites with improved thermal and waterproof properties were produced by using a concentrated slurry containing polystyrene nanoparticles (NPS) as an additive. The NPS/Hemihydrate mass ratio was varied between 0.00 and 0.42. The density of the composites decreased with the incr...

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Autores: López Pedrajas, Daniel, Carmona Franco, Manuel Salvador, Garrido Sáenz, Ignacio, Ramos Mellado, Francisco J., Rodríguez Romero, Juan Francisco, Borreguero Simón, Ana María
Tipo de documento: artigo
Data de publicação:2022
País:España
Recursos:Universidad de Castilla-La Mancha
Repositório:RUIdeRA. Repositorio Institucional de la UCLM
OAI Identifier:oai:ruidera.uclm.es:10578/30346
Acesso em linha:http://hdl.handle.net/10578/30346
Access Level:Acceso aberto
Palavra-chave:Conductividad térmica
Aislamiento
Permeabilidad
Yeso
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spelling Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum compositesLópez Pedrajas, DanielCarmona Franco, Manuel SalvadorGarrido Sáenz, IgnacioRamos Mellado, Francisco J.Rodríguez Romero, Juan FranciscoBorreguero Simón, Ana MaríaConductividad térmicaAislamientoPermeabilidadYesoLightweight gypsum composites with improved thermal and waterproof properties were produced by using a concentrated slurry containing polystyrene nanoparticles (NPS) as an additive. The NPS/Hemihydrate mass ratio was varied between 0.00 and 0.42. The density of the composites decreased with the increase of the NPS/Hemihydrate mass ratio, due to the change in the internal structure to a more lamellar one with crystals of larger size that grow also in a less compact distribution. This also caused an increase of the porosity (from 0.47 to 0.51) and a reduction in the thermal conductivity from 0.354 W m-1K−1 (NPS/Hem = 0) to 0.225 W m-1K−1 at 32 °C for the composite manufactured with the maximum NPS amount (NPS/Hem = 0.42). The thermal conductivity decrease allowed to reduce the final temperature at the steady state up to 2.5 °C compared with the unmodified gypsum, when they were exposed to a heat source at 45 °C. In addition, it was observed by SEM and TGA that the NPSs were distributed homogeneously throughout the gypsum composites blocks. Although the maximum compressive and flexural strengths decreased with the increase of NPS amount up to 76 and 61 %, respectively; all the synthesized lightweight gypsum blocks satisfied the European standard regulation EN 13279–1. The waterproof properties were measured by the contact angle, passing from 26.2° to 141.5 ° when changing from 0.0 NPS/Hem ratio to the maximum amount.Elsevier202220222022info:eu-repo/semantics/articleapplication/pdfapplication/pdfhttp://hdl.handle.net/10578/30346reponame:RUIdeRA. Repositorio Institucional de la UCLMinstname:Universidad de Castilla-La ManchaInglésinfo:eu-repo/semantics/openAccessoai:ruidera.uclm.es:10578/303462026-05-27T07:36:41Z
dc.title.none.fl_str_mv Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
title Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
spellingShingle Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
López Pedrajas, Daniel
Conductividad térmica
Aislamiento
Permeabilidad
Yeso
title_short Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
title_full Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
title_fullStr Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
title_full_unstemmed Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
title_sort Polystyrene nanoparticles slurry as an additive for developing insulating and waterproof gypsum composites
dc.creator.none.fl_str_mv López Pedrajas, Daniel
Carmona Franco, Manuel Salvador
Garrido Sáenz, Ignacio
Ramos Mellado, Francisco J.
Rodríguez Romero, Juan Francisco
Borreguero Simón, Ana María
author López Pedrajas, Daniel
author_facet López Pedrajas, Daniel
Carmona Franco, Manuel Salvador
Garrido Sáenz, Ignacio
Ramos Mellado, Francisco J.
Rodríguez Romero, Juan Francisco
Borreguero Simón, Ana María
author_role author
author2 Carmona Franco, Manuel Salvador
Garrido Sáenz, Ignacio
Ramos Mellado, Francisco J.
Rodríguez Romero, Juan Francisco
Borreguero Simón, Ana María
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Conductividad térmica
Aislamiento
Permeabilidad
Yeso
topic Conductividad térmica
Aislamiento
Permeabilidad
Yeso
description Lightweight gypsum composites with improved thermal and waterproof properties were produced by using a concentrated slurry containing polystyrene nanoparticles (NPS) as an additive. The NPS/Hemihydrate mass ratio was varied between 0.00 and 0.42. The density of the composites decreased with the increase of the NPS/Hemihydrate mass ratio, due to the change in the internal structure to a more lamellar one with crystals of larger size that grow also in a less compact distribution. This also caused an increase of the porosity (from 0.47 to 0.51) and a reduction in the thermal conductivity from 0.354 W m-1K−1 (NPS/Hem = 0) to 0.225 W m-1K−1 at 32 °C for the composite manufactured with the maximum NPS amount (NPS/Hem = 0.42). The thermal conductivity decrease allowed to reduce the final temperature at the steady state up to 2.5 °C compared with the unmodified gypsum, when they were exposed to a heat source at 45 °C. In addition, it was observed by SEM and TGA that the NPSs were distributed homogeneously throughout the gypsum composites blocks. Although the maximum compressive and flexural strengths decreased with the increase of NPS amount up to 76 and 61 %, respectively; all the synthesized lightweight gypsum blocks satisfied the European standard regulation EN 13279–1. The waterproof properties were measured by the contact angle, passing from 26.2° to 141.5 ° when changing from 0.0 NPS/Hem ratio to the maximum amount.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10578/30346
url http://hdl.handle.net/10578/30346
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:RUIdeRA. Repositorio Institucional de la UCLM
instname:Universidad de Castilla-La Mancha
instname_str Universidad de Castilla-La Mancha
reponame_str RUIdeRA. Repositorio Institucional de la UCLM
collection RUIdeRA. Repositorio Institucional de la UCLM
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,198674

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