Characterization of nano-SiO<inf>2</inf> cemented soil under the coupled effects of dry-wet cycles and chlorination

Chen, Q; Wan, S; Tao, G; Nimbalkar, S; Tian, Z; Yu, R

Characterization of nano-SiO<inf>2</inf> cemented soil under the coupled effects of dry-wet cycles and chlorination

Chen, Q Wan, S Tao, G Nimbalkar, S

Tian, Z Yu, R

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Publisher:: Taylor and Francis Group
Publication Type:: Journal Article
Citation:: Marine Georesources and Geotechnology, 2024, 42, (11), pp. 1560-1572
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Chen, Q
dc.contributor.author	Wan, S
dc.contributor.author	Tao, G
dc.contributor.author	Nimbalkar, S https://orcid.org/0000-0002-1538-3396
dc.contributor.author	Tian, Z
dc.contributor.author	Yu, R
dc.date.accessioned	2025-03-18T00:23:00Z
dc.date.available	2025-03-18T00:23:00Z
dc.date.issued	2024-01-01
dc.identifier.citation	Marine Georesources and Geotechnology, 2024, 42, (11), pp. 1560-1572
dc.identifier.issn	1064-119X
dc.identifier.issn	1521-0618
dc.identifier.uri	http://hdl.handle.net/10453/185944
dc.description.abstract	In contrast to cemented soils in terrestrial natural environments, cemented soils in littoral and marine geotechnical engineering face numerous difficulties. In coastal and marine geotechnical engineering, cemented soils are frequently degraded by ion erosion, tidal scouring, and temperature variations. Long-term marine environments present numerous challenges for cemented soil foundation projects. In marine geotechnical engineering, addressing and enhancing these degradation issues has become a crucial topic. To address this engineering problem, Nano-SiO2 is added to cement-stabilized soils to enhance their engineering performance. To investigate the mechanical effects and erosion mechanisms of Nano-SiO2 cemented soil subjected to chloride ion erosion and tidal alternation scouring, laboratory experiments, including immersion erosion tests with sodium chloride solution and dry-wet cycle tests, were designed. On specimens subjected to dry-wet cycles after chloride ion erosion at varying concentrations, unconfined compressive strength tests (UCS), X-ray diffraction (XRD) experiments, and scanning electron microscopy (SEM) were performed. The objective was to investigate the impact of chloride ions and Nano-SiO2 on the microstructure and strength of cemented soil. Adding 2.5% Nano-SiO2 can promote cement hydration reactions while preventing the entry of chloride ions into the cemented soil, thereby increasing the density and compressive strength of the cement.
dc.language	English
dc.publisher	Taylor and Francis Group
dc.relation.ispartof	Marine Georesources and Geotechnology
dc.relation.isbasedon	10.1080/1064119X.2023.2286476
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0405 Oceanography, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	Oceanography
dc.subject.classification	4005 Civil engineering
dc.title	Characterization of nano-SiO<inf>2</inf> cemented soil under the coupled effects of dry-wet cycles and chlorination
dc.type	Journal Article
utslib.citation.volume	42
utslib.for	0405 Oceanography
utslib.for	0914 Resources Engineering and Extractive Metallurgy
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Transport Research Centre (TRC)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Advanced Modelling and Geospatial lnformation Systems (CAMGIS)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Built Infrastructure Resilience (CBIR)
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2025-03-18T00:22:57Z
pubs.issue	11
pubs.publication-status	Published
pubs.volume	42
utslib.citation.issue	11

Abstract:

In contrast to cemented soils in terrestrial natural environments, cemented soils in littoral and marine geotechnical engineering face numerous difficulties. In coastal and marine geotechnical engineering, cemented soils are frequently degraded by ion erosion, tidal scouring, and temperature variations. Long-term marine environments present numerous challenges for cemented soil foundation projects. In marine geotechnical engineering, addressing and enhancing these degradation issues has become a crucial topic. To address this engineering problem, Nano-SiO2 is added to cement-stabilized soils to enhance their engineering performance. To investigate the mechanical effects and erosion mechanisms of Nano-SiO2 cemented soil subjected to chloride ion erosion and tidal alternation scouring, laboratory experiments, including immersion erosion tests with sodium chloride solution and dry-wet cycle tests, were designed. On specimens subjected to dry-wet cycles after chloride ion erosion at varying concentrations, unconfined compressive strength tests (UCS), X-ray diffraction (XRD) experiments, and scanning electron microscopy (SEM) were performed. The objective was to investigate the impact of chloride ions and Nano-SiO2 on the microstructure and strength of cemented soil. Adding 2.5% Nano-SiO2 can promote cement hydration reactions while preventing the entry of chloride ions into the cemented soil, thereby increasing the density and compressive strength of the cement.

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http://hdl.handle.net/10453/185944