Fatigue characteristics of nano-SiO<inf>2</inf> cemented soil under coupled effects of dry-wet cycle and seawater corrosion

Chen, Q; Rong, H; Tao, G; Nimbalkar, S; Xie, K

Fatigue characteristics of nano-SiO<inf>2</inf> cemented soil under coupled effects of dry-wet cycle and seawater corrosion

Chen, Q Rong, H Tao, G Nimbalkar, S

Xie, K

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Construction and Building Materials, 2023, 401
Issue Date:: 2023-10-19

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Field	Value	Language
dc.contributor.author	Chen, Q
dc.contributor.author	Rong, H
dc.contributor.author	Tao, G
dc.contributor.author	Nimbalkar, S https://orcid.org/0000-0002-1538-3396
dc.contributor.author	Xie, K
dc.date.accessioned	2024-04-12T09:27:54Z
dc.date.available	2024-04-12T09:27:54Z
dc.date.issued	2023-10-19
dc.identifier.citation	Construction and Building Materials, 2023, 401
dc.identifier.issn	0950-0618
dc.identifier.issn	1879-0526
dc.identifier.uri	http://hdl.handle.net/10453/177863
dc.description.abstract	In the marine environment, cement soils are subject to a variety of adverse conditions, including seawater corrosion, dry and wet cycles, and dynamic loading. These environmental conditions pose a significant threat to the structural integrity of these engineered soils. The addition of Nano-SiO2 particles to these cement-treated soils is offered as an engineering solution to extend their service life. It has been shown that the incorporation of Nano-SiO2 into the Cemented soil can significantly increase the static strength and improve the microstructure of the Cemented soil. Four different Nano-SiO2 particles, which have been extensively studied in the literature, are used as admixtures in the cemented-soil. Optimal dosages of these Nano-SiO2 particles are determined based on unconfined compressive strength (UCS) and scanning electron microscopy (SEM) data. Wet-dry cycles are applied to the cement-treated soil samples to simulate tidal rise and fall relevant to the marine environment. Nuclear magnetic resonance (NMR) and X-ray diffraction tests are also performed to complement the SEM study. The incorporation of Nano-SiO2 into cement-treated soils in a marine environment improved the mechanical strength and fatigue life of the cement-treated soils. It also reduced the corrosion rate of the cemented soils in the sea, and the improvement in mechanical stability was also quite remarkable. The fatigue life of Nano-SiO2 cemented soils was 1.35 times longer than that of conventional cemented soils, and the peak dynamic modulus of elasticity of the added Nano-SiO2 cemented soils increased by 29%, when subjected to 60 cycles of seawater. The improved fatigue life of Nano-SiO2 Cemented soils is a function of their structural filling tropism and distribution tropism. The improved fatigue of Nano-SiO2 is a result of the combined effect of particle effect, volcanic ash effect, and nucleation effect.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Construction and Building Materials
dc.relation.isbasedon	10.1016/j.conbuildmat.2023.132579
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.subject.classification	3302 Building
dc.subject.classification	4005 Civil engineering
dc.subject.classification	4016 Materials engineering
dc.title	Fatigue characteristics of nano-SiO<inf>2</inf> cemented soil under coupled effects of dry-wet cycle and seawater corrosion
dc.type	Journal Article
utslib.citation.volume	401
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
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/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-12T09:27:48Z
pubs.publication-status	Published
pubs.volume	401

Abstract:

In the marine environment, cement soils are subject to a variety of adverse conditions, including seawater corrosion, dry and wet cycles, and dynamic loading. These environmental conditions pose a significant threat to the structural integrity of these engineered soils. The addition of Nano-SiO2 particles to these cement-treated soils is offered as an engineering solution to extend their service life. It has been shown that the incorporation of Nano-SiO2 into the Cemented soil can significantly increase the static strength and improve the microstructure of the Cemented soil. Four different Nano-SiO2 particles, which have been extensively studied in the literature, are used as admixtures in the cemented-soil. Optimal dosages of these Nano-SiO2 particles are determined based on unconfined compressive strength (UCS) and scanning electron microscopy (SEM) data. Wet-dry cycles are applied to the cement-treated soil samples to simulate tidal rise and fall relevant to the marine environment. Nuclear magnetic resonance (NMR) and X-ray diffraction tests are also performed to complement the SEM study. The incorporation of Nano-SiO2 into cement-treated soils in a marine environment improved the mechanical strength and fatigue life of the cement-treated soils. It also reduced the corrosion rate of the cemented soils in the sea, and the improvement in mechanical stability was also quite remarkable. The fatigue life of Nano-SiO2 cemented soils was 1.35 times longer than that of conventional cemented soils, and the peak dynamic modulus of elasticity of the added Nano-SiO2 cemented soils increased by 29%, when subjected to 60 cycles of seawater. The improved fatigue life of Nano-SiO2 Cemented soils is a function of their structural filling tropism and distribution tropism. The improved fatigue of Nano-SiO2 is a result of the combined effect of particle effect, volcanic ash effect, and nucleation effect.

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