A Dual-Permeability Approach to Study Anomalous Moisture Transport Properties of Cement-Based Materials
dc.contributor.author
Zhang, Zhidong
dc.contributor.author
Angst, Ueli
dc.date.accessioned
2020-09-30T08:37:57Z
dc.date.available
2020-09-07T05:51:32Z
dc.date.available
2020-09-07T07:21:12Z
dc.date.available
2020-09-30T08:37:57Z
dc.date.issued
2020-10
dc.identifier.issn
0169-3913
dc.identifier.issn
1573-1634
dc.identifier.other
10.1007/s11242-020-01469-y
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/438735
dc.identifier.doi
10.3929/ethz-b-000438735
dc.description.abstract
Anomalous moisture transport in cement-based materials is often reported in the literature, but the conventional single-porosity moisture transport models generally fail to provide accurate simulation results. Previous studies suggested that the anomalous moisture transport could be caused by different moisture transport velocity in large and small pores. Based on this concept, the present study proposes a continuous dual-permeability model for cement-based material. The proposed model includes the transport contribution of both liquid water and water vapor, which are governed by liquid advection and vapor diffusion, respectively. We explicitly consider that moisture transport in the large pore region is faster than the small pore region. The volumetric fraction of each region is determined when fitting the measured sorption isotherms by using a bimodal equation. The validation with experimental data shows that the dual-permeability model can well simulate both the “normal” and the anomalous moisture transport. The applicability of the proposed model implies that the “dual-porosity property” could be one of reasons that cause anomalous moisture transport in cementitious materials. In addition, results show that vapor diffusion can be neglected for moisture transport in both porosities at high relative humidity (RH), while at low RH, vapor diffusion must be considered.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Springer
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
Water vapor sorption isotherm
en_US
dc.subject
Permeability
en_US
dc.subject
Van Genuchten–Mualem model
en_US
dc.subject
Moisture transfer factor
en_US
dc.subject
Volumetric fraction
en_US
dc.title
A Dual-Permeability Approach to Study Anomalous Moisture Transport Properties of Cement-Based Materials
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2020-09-04
ethz.journal.title
Transport in Porous Media
ethz.journal.volume
135
en_US
ethz.journal.abbreviated
Transp Porous Med
ethz.pages.start
59
en_US
ethz.pages.end
78
en_US
ethz.size
20 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.grant
ENDURE - Enhanced Durability Predictions of Reinforced Concrete Exposed to Corrosive Environments
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
s.l.
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02606 - Institut für Baustoffe (IfB) / Institute for Building Materials::09593 - Angst, Ueli / Angst, Ueli
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02115 - Dep. Bau, Umwelt und Geomatik / Dep. of Civil, Env. and Geomatic Eng.::02606 - Institut für Baustoffe (IfB) / Institute for Building Materials::09593 - Angst, Ueli / Angst, Ueli
en_US
ethz.grant.agreementno
163675
ethz.grant.agreementno
163675
ethz.grant.fundername
SNF
ethz.grant.fundername
SNF
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.funderDoi
10.13039/501100001711
ethz.grant.program
SNF-Förderungsprofessuren Stufe 2
ethz.grant.program
SNF-Förderungsprofessuren Stufe 2
ethz.date.deposited
2020-09-07T05:51:44Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-09-30T08:38:09Z
ethz.rosetta.lastUpdated
2022-03-29T03:15:06Z
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true
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true
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