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Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete

Over the past few years, geopolymer concrete (GPC) has experienced increasing demands in construction technology thanks to its numerous advantages, such as being eco-friendly and highly resistant to elevated temperatures and chemical attacks in aggressive environments. However, similar to normal con...

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Main Authors: Nikbakht, E., Wong Weng Lok, J., Teo, W.
Format: Article
Published: Elsevier Ltd 2021
Online Access:https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103003354&doi=10.1016%2fj.istruc.2021.03.014&partnerID=40&md5=67dd7193d3c3b89f204a281a2d0fdd2d
http://eprints.utp.edu.my/23703/
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spelling my.utp.eprints.237032021-08-19T09:14:37Z Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete Nikbakht, E. Wong Weng Lok, J. Teo, W. Over the past few years, geopolymer concrete (GPC) has experienced increasing demands in construction technology thanks to its numerous advantages, such as being eco-friendly and highly resistant to elevated temperatures and chemical attacks in aggressive environments. However, similar to normal concrete, GPC has limited tensile strength and deformation capacity. High-performance concrete (HPC) exhibits high flexural strength and enhanced mechanical properties, such as tensile strength. In this study, novel hybrid beams consisting of GPC at the compression zone and HPC at the tension zone are explored and investigated. The mechanical properties of GPC and HPC as well as the structural behaviour of hybrid beams consisting of two different layers of GPC and HPC with different ratios (50 to 50, 75 to 25) are also investigated. Moreover, full-depth beams consisting of single layer of either GPC or HPC are cast and tested as the control specimens. In addition, the structural behaviour of beams with and without shear reinforcement in terms of shear strength, crack patterns, failure modes, ductility, and energy absorption is investigated. As shown by the results, compared to full-depth GPC and HPC beams, hybrid composite beams without shear reinforcement exhibit low ultimate strength mainly because of the large debonding between the GPC and HPC layers. However, hybrid beams with shear reinforcement exhibit high stiffness, shear strength, and ductility, especially hybrid beams with a GPC-to-HPC ratio of 50 to 50, which demonstrate full composite actions between the GPC and HPC and as a result exhibit high ductility and deformation capacity. © 2021 Elsevier Ltd 2021 Article NonPeerReviewed https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103003354&doi=10.1016%2fj.istruc.2021.03.014&partnerID=40&md5=67dd7193d3c3b89f204a281a2d0fdd2d Nikbakht, E. and Wong Weng Lok, J. and Teo, W. (2021) Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete. Structures, 32 . pp. 106-115. http://eprints.utp.edu.my/23703/
institution Universiti Teknologi Petronas
building UTP Resource Centre
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Petronas
content_source UTP Institutional Repository
url_provider http://eprints.utp.edu.my/
description Over the past few years, geopolymer concrete (GPC) has experienced increasing demands in construction technology thanks to its numerous advantages, such as being eco-friendly and highly resistant to elevated temperatures and chemical attacks in aggressive environments. However, similar to normal concrete, GPC has limited tensile strength and deformation capacity. High-performance concrete (HPC) exhibits high flexural strength and enhanced mechanical properties, such as tensile strength. In this study, novel hybrid beams consisting of GPC at the compression zone and HPC at the tension zone are explored and investigated. The mechanical properties of GPC and HPC as well as the structural behaviour of hybrid beams consisting of two different layers of GPC and HPC with different ratios (50 to 50, 75 to 25) are also investigated. Moreover, full-depth beams consisting of single layer of either GPC or HPC are cast and tested as the control specimens. In addition, the structural behaviour of beams with and without shear reinforcement in terms of shear strength, crack patterns, failure modes, ductility, and energy absorption is investigated. As shown by the results, compared to full-depth GPC and HPC beams, hybrid composite beams without shear reinforcement exhibit low ultimate strength mainly because of the large debonding between the GPC and HPC layers. However, hybrid beams with shear reinforcement exhibit high stiffness, shear strength, and ductility, especially hybrid beams with a GPC-to-HPC ratio of 50 to 50, which demonstrate full composite actions between the GPC and HPC and as a result exhibit high ductility and deformation capacity. © 2021
format Article
author Nikbakht, E.
Wong Weng Lok, J.
Teo, W.
spellingShingle Nikbakht, E.
Wong Weng Lok, J.
Teo, W.
Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete
author_facet Nikbakht, E.
Wong Weng Lok, J.
Teo, W.
author_sort Nikbakht, E.
title Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete
title_short Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete
title_full Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete
title_fullStr Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete
title_full_unstemmed Structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete
title_sort structural behaviour of novel composite beams consisting of geopolymer concrete and high-performance concrete
publisher Elsevier Ltd
publishDate 2021
url https://www.scopus.com/inward/record.uri?eid=2-s2.0-85103003354&doi=10.1016%2fj.istruc.2021.03.014&partnerID=40&md5=67dd7193d3c3b89f204a281a2d0fdd2d
http://eprints.utp.edu.my/23703/
_version_ 1738656509727866880
score 13.211869

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