Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time

Abstract Reinforced concrete elements with long curing ages tend not to present spalling when subjected to high temperatures since heat transfer in concrete is influenced mostly by the materials constituting its composition. Polypropylene microfiber-reinforced concrete presents more porosity and hig...

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Autores principales:	Manica,Gustavo, Bolina,Fabrício, Tutikian,Bernardo, Valadares,Matheus
Lenguaje:	English
Publicado:	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile 2019
Materias:	Solid reinforced concrete boards Resistance to fire Wall system Polypropylene microfiber Heat transfer mechanism
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2019000300595
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spelling	oai:scielo:S0718-915X20190003005952020-02-04Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing timeManica,GustavoBolina,FabrícioTutikian,BernardoValadares,Matheus Solid reinforced concrete boards Resistance to fire Wall system Polypropylene microfiber Heat transfer mechanism Abstract Reinforced concrete elements with long curing ages tend not to present spalling when subjected to high temperatures since heat transfer in concrete is influenced mostly by the materials constituting its composition. Polypropylene microfiber-reinforced concrete presents more porosity and higher thermal insulation as the fibers melt when exposed to high temperatures. Therefore, this study aimed to assess the influence of the addition of polypropylene microfibers on the resistance to fire of reinforced concrete boards. The mechanical tests required crafting 18 boards and 3 walls in real scale, which measured 3.15x3.00 m. The analysis comprised 3 types of systems, being the reference reinforced concrete and the concretes with polypropylene microfiber ratios of 0.97 kg/m³ and 1.94 kg/m³. Were extract 18 specimens for the axial compression test. The fire test was performed in a vertical furnace under the ISO 834 curve. None of the 3 walls displayed spalling and the boards with higher microfiber ratios presented better fire performance, with smaller maximum displacements. The wall with 1.94 kg/m³ microfiber ratio obtained a gain of 23.5 min in thermal insulation compared to the reference reinforced concrete wall. It was also perceived that the incorporation of polypropylene microfibers in the concrete reduces its compressive strength.info:eu-repo/semantics/openAccessEscuela de Construcción Civil, Pontificia Universidad Católica de ChileRevista de la construcción v.18 n.3 20192019-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2019000300595en10.7764/rdlc.18.3.595
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Solid reinforced concrete boards Resistance to fire Wall system Polypropylene microfiber Heat transfer mechanism
spellingShingle	Solid reinforced concrete boards Resistance to fire Wall system Polypropylene microfiber Heat transfer mechanism Manica,Gustavo Bolina,Fabrício Tutikian,Bernardo Valadares,Matheus Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time
description	Abstract Reinforced concrete elements with long curing ages tend not to present spalling when subjected to high temperatures since heat transfer in concrete is influenced mostly by the materials constituting its composition. Polypropylene microfiber-reinforced concrete presents more porosity and higher thermal insulation as the fibers melt when exposed to high temperatures. Therefore, this study aimed to assess the influence of the addition of polypropylene microfibers on the resistance to fire of reinforced concrete boards. The mechanical tests required crafting 18 boards and 3 walls in real scale, which measured 3.15x3.00 m. The analysis comprised 3 types of systems, being the reference reinforced concrete and the concretes with polypropylene microfiber ratios of 0.97 kg/m³ and 1.94 kg/m³. Were extract 18 specimens for the axial compression test. The fire test was performed in a vertical furnace under the ISO 834 curve. None of the 3 walls displayed spalling and the boards with higher microfiber ratios presented better fire performance, with smaller maximum displacements. The wall with 1.94 kg/m³ microfiber ratio obtained a gain of 23.5 min in thermal insulation compared to the reference reinforced concrete wall. It was also perceived that the incorporation of polypropylene microfibers in the concrete reduces its compressive strength.
author	Manica,Gustavo Bolina,Fabrício Tutikian,Bernardo Valadares,Matheus
author_facet	Manica,Gustavo Bolina,Fabrício Tutikian,Bernardo Valadares,Matheus
author_sort	Manica,Gustavo
title	Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time
title_short	Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time
title_full	Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time
title_fullStr	Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time
title_full_unstemmed	Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time
title_sort	analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time
publisher	Escuela de Construcción Civil, Pontificia Universidad Católica de Chile
publishDate	2019
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-915X2019000300595
work_keys_str_mv	AT manicagustavo analysisoftheresistancetofireofsolidconcreteboardswithpolypropylenemicrofibersandlongcuringtime AT bolinafabricio analysisoftheresistancetofireofsolidconcreteboardswithpolypropylenemicrofibersandlongcuringtime AT tutikianbernardo analysisoftheresistancetofireofsolidconcreteboardswithpolypropylenemicrofibersandlongcuringtime AT valadaresmatheus analysisoftheresistancetofireofsolidconcreteboardswithpolypropylenemicrofibersandlongcuringtime
_version_	1714206303363006464

Analysis of the resistance to fire of solid concrete boards with polypropylene microfibers and long curing time

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