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Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature

Despite the superior properties of reactive powder concrete (RPC), the possibility of spalling under fire conditions still exists, which can lead to a significant reduction in the fire endurance of reinforced concrete members. This study investigates the efficiency of using the different percentages...

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Main Authors: Abdul-Rahman, Mazin, Al-Attar, Alyaa, Hamada, Hussein M., Tayeh, Bassam
Format: Article
Language:English
Published: Elsevier Ltd 2020
Subjects:
TA Engineering (General). Civil engineering (General)
Online Access:http://umpir.ump.edu.my/id/eprint/27771/1/Microstructure%20and%20structural%20analysis%20of%20polypropylene%20fibre%20reinforced%20.pdf
http://umpir.ump.edu.my/id/eprint/27771/
https://doi.org/10.1016/j.jobe.2019.101167
https://doi.org/10.1016/j.jobe.2019.101167
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spelling my.ump.umpir.277712020-12-23T03:11:19Z http://umpir.ump.edu.my/id/eprint/27771/ Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature Abdul-Rahman, Mazin Al-Attar, Alyaa Hamada, Hussein M. Tayeh, Bassam TA Engineering (General). Civil engineering (General) Despite the superior properties of reactive powder concrete (RPC), the possibility of spalling under fire conditions still exists, which can lead to a significant reduction in the fire endurance of reinforced concrete members. This study investigates the efficiency of using the different percentages of polypropylene fibres (PPFs) for enhancing the fire resistance of reinforced beams made from RPC. Five RPC beams were tested by applying two concentrated loads. One of them (without PPFs) was tested under monotonic load up to failure. The other four beams were subjected to service load, and then controlled fire was applied for 120 min in accordance with the fire temperature vs. time curve prescribed in ASTM E 119. Loading tests were then conducted on the beams that were not completely damaged through fire testing, in order to examine their remaining strength after cooling. Experimental results showed that non-fibrous reinforced RPC beams suffer early spalling during the fire test, thus causing beam failure after 38 min of fire exposure. The addition of PPFs in a low volume percentage (0.25%) decreases spalling and delays beam failure until 115 min, whereas PPFs in high percentages (0.75% and 1.25%) completely prevent the spalling and beam collapse. Moreover, an increase in PPF content reduces the total deflection of a beam and improves the residual strength and ultimate strength of fire-failed beams subsequent to cooling. Elsevier Ltd 2020-01-07 Article PeerReviewed pdf en http://umpir.ump.edu.my/id/eprint/27771/1/Microstructure%20and%20structural%20analysis%20of%20polypropylene%20fibre%20reinforced%20.pdf Abdul-Rahman, Mazin and Al-Attar, Alyaa and Hamada, Hussein M. and Tayeh, Bassam (2020) Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature. Journal of Building Engineering, 29 (101167). pp. 1-8. ISSN 2352-7102 https://doi.org/10.1016/j.jobe.2019.101167 https://doi.org/10.1016/j.jobe.2019.101167
institution Universiti Malaysia Pahang
building UMP Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Pahang
content_source UMP Institutional Repository
url_provider http://umpir.ump.edu.my/
language English
topic TA Engineering (General). Civil engineering (General)
spellingShingle TA Engineering (General). Civil engineering (General)
Abdul-Rahman, Mazin
Al-Attar, Alyaa
Hamada, Hussein M.
Tayeh, Bassam
Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature
description Despite the superior properties of reactive powder concrete (RPC), the possibility of spalling under fire conditions still exists, which can lead to a significant reduction in the fire endurance of reinforced concrete members. This study investigates the efficiency of using the different percentages of polypropylene fibres (PPFs) for enhancing the fire resistance of reinforced beams made from RPC. Five RPC beams were tested by applying two concentrated loads. One of them (without PPFs) was tested under monotonic load up to failure. The other four beams were subjected to service load, and then controlled fire was applied for 120 min in accordance with the fire temperature vs. time curve prescribed in ASTM E 119. Loading tests were then conducted on the beams that were not completely damaged through fire testing, in order to examine their remaining strength after cooling. Experimental results showed that non-fibrous reinforced RPC beams suffer early spalling during the fire test, thus causing beam failure after 38 min of fire exposure. The addition of PPFs in a low volume percentage (0.25%) decreases spalling and delays beam failure until 115 min, whereas PPFs in high percentages (0.75% and 1.25%) completely prevent the spalling and beam collapse. Moreover, an increase in PPF content reduces the total deflection of a beam and improves the residual strength and ultimate strength of fire-failed beams subsequent to cooling.
format Article
author Abdul-Rahman, Mazin
Al-Attar, Alyaa
Hamada, Hussein M.
Tayeh, Bassam
author_facet Abdul-Rahman, Mazin
Al-Attar, Alyaa
Hamada, Hussein M.
Tayeh, Bassam
author_sort Abdul-Rahman, Mazin
title Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature
title_short Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature
title_full Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature
title_fullStr Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature
title_full_unstemmed Microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature
title_sort microstructure and structural analysis of polypropylene fibre reinforced reactive powder concrete beams exposed to elevated temperature
publisher Elsevier Ltd
publishDate 2020
url http://umpir.ump.edu.my/id/eprint/27771/1/Microstructure%20and%20structural%20analysis%20of%20polypropylene%20fibre%20reinforced%20.pdf
http://umpir.ump.edu.my/id/eprint/27771/
https://doi.org/10.1016/j.jobe.2019.101167
https://doi.org/10.1016/j.jobe.2019.101167
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score 13.211869

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