Staff View: Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout

Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout

Nowadays, cement manufacturing stands as the third most significant contributor to anthropogenic CO2 emissions. Alkali-activated techniques are emerging as a potentially more environmentally friendly alternate binder to mitigate the risks related to climate change. The current investigation utilizes...

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Main Authors:	Murali G., Parthiban K., Wong L.S., Abid S.R., Nassar A.K.
Other Authors:	57203952839
Format:	Article
Published:	Elsevier Ltd 2025
Subjects:	Climate change Concrete aggregates Concrete slabs Grouting Impact strength Mortar Multiwalled carbon nanotubes (MWCN) Slags Steel fibers Aggregate concrete Alkali activated slags Alkali-activated Alkali-activated slag grout Crack resistance Fibrous concrete Functionally graded Middle layer Multi-walled-carbon-nanotubes Preplaced aggregates Failure (mechanical)
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spelling	my.uniten.dspace-366882025-03-03T15:43:56Z Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout Murali G. Parthiban K. Wong L.S. Abid S.R. Nassar A.K. 57203952839 57871610800 55504782500 56548386400 58751060100 Climate change Concrete aggregates Concrete slabs Grouting Impact strength Mortar Multiwalled carbon nanotubes (MWCN) Slags Steel fibers Aggregate concrete Alkali activated slags Alkali-activated Alkali-activated slag grout Crack resistance Fibrous concrete Functionally graded Middle layer Multi-walled-carbon-nanotubes Preplaced aggregates Failure (mechanical) Nowadays, cement manufacturing stands as the third most significant contributor to anthropogenic CO2 emissions. Alkali-activated techniques are emerging as a potentially more environmentally friendly alternate binder to mitigate the risks related to climate change. The current investigation utilizes the notion of preplaced aggregate concrete (PAC) and alkali-activated slag grouts comprising multi-walled carbon nanotubes (MWCNT) of 0.1 % dosage to implement functionally graded preplaced aggregate fibrous concrete slabs (FGPAFC). The optimum efflux time of alkali-activated slag grouts was determined through trials with various superplasticizer dosages and water-to-binder ratios. However, as it has not been investigated previously, the effect of alkali-activated grout made up of MWCNT on the impact strength of the FGPAFC slab deserves special focus. For this, seven different slabs were prepared, in which five three-layered FGPAFC slabs containing a steel fibre at a dosage of 3.5?4.5 % at a 0.25 % increment were provided at the upper and lower layers. At the same time, the middle layer contains 0?2 % fibres at 0.5 % increment. Using the same amount of fibre as in FGPAFC, a PAC slab with uniform fibre distribution is made to examine how effectively the three-layer arrangement performs. The slab underwent an impact test in accordance with the guidelines set forth by ACI Committee 544. The cracking and failure impact number, crack resistance at service and ultimate stages, impact ductility, the ratio of crack resistance, failure pattern, and its mechanism were examined. Findings reveal that the cracking and failure impact energies were enhanced by roughly 3?12 % and 15?53 %, respectively, by lowering the fibre content at the middle layer and raising it at the upper and lower layers of the FGPAFC slab from 3.0 progressively to 4.5 %. The contribution of steel fibre is more significant than MWCNT for enriching the impact resistance of FGPAFC. The findings derived from this study offer foundational data for subsequent comprehensive scientific examination of FPAFC subjected to impact. ? 2023 Elsevier Ltd Final 2025-03-03T07:43:56Z 2025-03-03T07:43:56Z 2024 Article 10.1016/j.jobe.2023.108240 2-s2.0-85179009641 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85179009641&doi=10.1016%2fj.jobe.2023.108240&partnerID=40&md5=b405bc6eab25ec72c3d52256fd69de17 https://irepository.uniten.edu.my/handle/123456789/36688 82 108240 Elsevier Ltd Scopus
institution	Universiti Tenaga Nasional
building	UNITEN Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Tenaga Nasional
content_source	UNITEN Institutional Repository
url_provider	http://dspace.uniten.edu.my/
topic	Climate change Concrete aggregates Concrete slabs Grouting Impact strength Mortar Multiwalled carbon nanotubes (MWCN) Slags Steel fibers Aggregate concrete Alkali activated slags Alkali-activated Alkali-activated slag grout Crack resistance Fibrous concrete Functionally graded Middle layer Multi-walled-carbon-nanotubes Preplaced aggregates Failure (mechanical)
spellingShingle	Climate change Concrete aggregates Concrete slabs Grouting Impact strength Mortar Multiwalled carbon nanotubes (MWCN) Slags Steel fibers Aggregate concrete Alkali activated slags Alkali-activated Alkali-activated slag grout Crack resistance Fibrous concrete Functionally graded Middle layer Multi-walled-carbon-nanotubes Preplaced aggregates Failure (mechanical) Murali G. Parthiban K. Wong L.S. Abid S.R. Nassar A.K. Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout
description	Nowadays, cement manufacturing stands as the third most significant contributor to anthropogenic CO2 emissions. Alkali-activated techniques are emerging as a potentially more environmentally friendly alternate binder to mitigate the risks related to climate change. The current investigation utilizes the notion of preplaced aggregate concrete (PAC) and alkali-activated slag grouts comprising multi-walled carbon nanotubes (MWCNT) of 0.1 % dosage to implement functionally graded preplaced aggregate fibrous concrete slabs (FGPAFC). The optimum efflux time of alkali-activated slag grouts was determined through trials with various superplasticizer dosages and water-to-binder ratios. However, as it has not been investigated previously, the effect of alkali-activated grout made up of MWCNT on the impact strength of the FGPAFC slab deserves special focus. For this, seven different slabs were prepared, in which five three-layered FGPAFC slabs containing a steel fibre at a dosage of 3.5?4.5 % at a 0.25 % increment were provided at the upper and lower layers. At the same time, the middle layer contains 0?2 % fibres at 0.5 % increment. Using the same amount of fibre as in FGPAFC, a PAC slab with uniform fibre distribution is made to examine how effectively the three-layer arrangement performs. The slab underwent an impact test in accordance with the guidelines set forth by ACI Committee 544. The cracking and failure impact number, crack resistance at service and ultimate stages, impact ductility, the ratio of crack resistance, failure pattern, and its mechanism were examined. Findings reveal that the cracking and failure impact energies were enhanced by roughly 3?12 % and 15?53 %, respectively, by lowering the fibre content at the middle layer and raising it at the upper and lower layers of the FGPAFC slab from 3.0 progressively to 4.5 %. The contribution of steel fibre is more significant than MWCNT for enriching the impact resistance of FGPAFC. The findings derived from this study offer foundational data for subsequent comprehensive scientific examination of FPAFC subjected to impact. ? 2023 Elsevier Ltd
author2	57203952839
author_facet	57203952839 Murali G. Parthiban K. Wong L.S. Abid S.R. Nassar A.K.
format	Article
author	Murali G. Parthiban K. Wong L.S. Abid S.R. Nassar A.K.
author_sort	Murali G.
title	Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout
title_short	Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout
title_full	Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout
title_fullStr	Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout
title_full_unstemmed	Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout
title_sort	enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout
publisher	Elsevier Ltd
publishDate	2025
_version_	1825816115346931712
score	13.244109

Enhanced impact properties of functionally graded preplaced aggregate fibrous concrete slabs comprising alkali-activated slag and carbon nanotube grout

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