Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres

In this study, the geotechnical and piezoresistivity properties of a sustainable self-sensing cementitious stabilised sand reinforced with recycled fibres (self-sensing cementitious geocomposite, SCG) were extensively investigated. In this route, different concentrations of recycled glass, polypropy...

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Autores principales:	Mohammadmahdi Abedi, António Gomes Correia, Raul Fangueiro
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Geotechnical properties Self-sensing geocomposite Smart geomaterial Fibre reinforcement Durability Transportation engineering TA1001-1280
Acceso en línea:	https://doaj.org/article/2f4e98b25eac4adc903e437ef6ecd96f
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id	oai:doaj.org-article:2f4e98b25eac4adc903e437ef6ecd96f
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spelling	oai:doaj.org-article:2f4e98b25eac4adc903e437ef6ecd96f2021-11-26T04:41:36ZGeotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres2666-691X10.1016/j.treng.2021.100096https://doaj.org/article/2f4e98b25eac4adc903e437ef6ecd96f2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666691X2100052Xhttps://doaj.org/toc/2666-691XIn this study, the geotechnical and piezoresistivity properties of a sustainable self-sensing cementitious stabilised sand reinforced with recycled fibres (self-sensing cementitious geocomposite, SCG) were extensively investigated. In this route, different concentrations of recycled glass, polypropylene, and ultra-high-molecular-weight polyethylene (GF, PP, and UHMWPE) fibres were incorporated into the conductive stabilised sand with 10% cement composed of 0.17% hybrid (1:1) carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs). The specimens were fabricated using the standard Proctor compaction method at optimum water content, and their mechanical, hydraulic, microstructural, durability, and piezoresistivity properties were investigated after 28 days of hydration using different laboratory test methods. The test results indicate that the maximum dry densities of all SCGs were obtained with a degree of saturation of approximately 85%. For these moisture conditions, there are well-defined relationships between the maximum dry density and strength, permeability, and ultrasonic pulse velocity for SCGs. The GF and UHMWPE fibres exhibited the best performances in terms of strength, durability in climatic cycles, as well as a reduction in permeability. A unique relationship between the ratio of tangent modulus and strength with the strain was defined for all the SCGs that can be of practical use in geocomposite. Furthermore, the piezoresistivity and sensitivity of the SCGs were also increased by reinforcing the geocomposites with fibres, due to increasing their ductility. In summary, we believe that this novel approach contributes to a new era of smart geocomposite materials in sustainable intelligent transport infrastructures.Mohammadmahdi AbediAntónio Gomes CorreiaRaul FangueiroElsevierarticleGeotechnical propertiesSelf-sensing geocompositeSmart geomaterialFibre reinforcementDurabilityTransportation engineeringTA1001-1280ENTransportation Engineering, Vol 6, Iss , Pp 100096- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Geotechnical properties Self-sensing geocomposite Smart geomaterial Fibre reinforcement Durability Transportation engineering TA1001-1280
spellingShingle	Geotechnical properties Self-sensing geocomposite Smart geomaterial Fibre reinforcement Durability Transportation engineering TA1001-1280 Mohammadmahdi Abedi António Gomes Correia Raul Fangueiro Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres
description	In this study, the geotechnical and piezoresistivity properties of a sustainable self-sensing cementitious stabilised sand reinforced with recycled fibres (self-sensing cementitious geocomposite, SCG) were extensively investigated. In this route, different concentrations of recycled glass, polypropylene, and ultra-high-molecular-weight polyethylene (GF, PP, and UHMWPE) fibres were incorporated into the conductive stabilised sand with 10% cement composed of 0.17% hybrid (1:1) carbon nanotubes (CNTs) and graphene nanoplatelets (GNPs). The specimens were fabricated using the standard Proctor compaction method at optimum water content, and their mechanical, hydraulic, microstructural, durability, and piezoresistivity properties were investigated after 28 days of hydration using different laboratory test methods. The test results indicate that the maximum dry densities of all SCGs were obtained with a degree of saturation of approximately 85%. For these moisture conditions, there are well-defined relationships between the maximum dry density and strength, permeability, and ultrasonic pulse velocity for SCGs. The GF and UHMWPE fibres exhibited the best performances in terms of strength, durability in climatic cycles, as well as a reduction in permeability. A unique relationship between the ratio of tangent modulus and strength with the strain was defined for all the SCGs that can be of practical use in geocomposite. Furthermore, the piezoresistivity and sensitivity of the SCGs were also increased by reinforcing the geocomposites with fibres, due to increasing their ductility. In summary, we believe that this novel approach contributes to a new era of smart geocomposite materials in sustainable intelligent transport infrastructures.
format	article
author	Mohammadmahdi Abedi António Gomes Correia Raul Fangueiro
author_facet	Mohammadmahdi Abedi António Gomes Correia Raul Fangueiro
author_sort	Mohammadmahdi Abedi
title	Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres
title_short	Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres
title_full	Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres
title_fullStr	Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres
title_full_unstemmed	Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres
title_sort	geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/2f4e98b25eac4adc903e437ef6ecd96f
work_keys_str_mv	AT mohammadmahdiabedi geotechnicalandpiezoresistivitypropertiesofsustainablecementitiousstabilizedsandreinforcedwithrecycledfibres AT antoniogomescorreia geotechnicalandpiezoresistivitypropertiesofsustainablecementitiousstabilizedsandreinforcedwithrecycledfibres AT raulfangueiro geotechnicalandpiezoresistivitypropertiesofsustainablecementitiousstabilizedsandreinforcedwithrecycledfibres
_version_	1718409769926000640

Geotechnical and piezoresistivity properties of sustainable cementitious stabilized sand reinforced with recycled fibres

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