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Article: Experimental Investigation and Analytical Modeling of Chloride Diffusivity of Fly Ash Concrete
Title | Experimental Investigation and Analytical Modeling of Chloride Diffusivity of Fly Ash Concrete |
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Authors | |
Keywords | fly ash concrete chloride diffusivity experimental investigation analytical method |
Issue Date | 2020 |
Publisher | MDPIAG. The Journal's web site is located at http://www.mdpi.com/journal/materials/ |
Citation | Materials, 2020, v. 13 n. 4, p. article no. 862 How to Cite? |
Abstract | Owing to its importance in the assessment of reinforced concrete structures, it is essential to determine the chloride diffusivity of fly ash concrete. This paper presents an investigation into the diffusion characteristics of chloride ions in fly ash concrete. Through experiment, the relationship between chloride diffusivity and curing age up to 1800 days is measured and the effects of curing age, water/binder ratio, aggregate volume fraction, and fly ash content (i.e., percentage of total cementitious material by mass) on chloride diffusivity are evaluated. It is found that the chloride diffusivity decreases with the increase of curing age, aggregate volume fraction, and fly ash content, but increases with the increase of water/binder ratio. In analytical modeling, an equivalent aggregate model is constructed and the equivalent interfacial transition zone (ITZ) thickness is derived analytically. With the equivalent aggregate model, three-phase fly ash concrete reduces to a two-phase composite material. By extending the Maxwell method, the chloride diffusivity of fly ash concrete is formulated. Finally, the validity of the analytical method is verified by experimental results. View Full-Text |
Persistent Identifier | http://hdl.handle.net/10722/293280 |
ISSN | 2021 Impact Factor: 3.748 2020 SCImago Journal Rankings: 0.682 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Zhang, J | - |
dc.contributor.author | Zhou, XZ | - |
dc.contributor.author | Zheng, JJ | - |
dc.contributor.author | Ye, HL | - |
dc.contributor.author | Yang, J | - |
dc.date.accessioned | 2020-11-23T08:14:26Z | - |
dc.date.available | 2020-11-23T08:14:26Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Materials, 2020, v. 13 n. 4, p. article no. 862 | - |
dc.identifier.issn | 1996-1944 | - |
dc.identifier.uri | http://hdl.handle.net/10722/293280 | - |
dc.description.abstract | Owing to its importance in the assessment of reinforced concrete structures, it is essential to determine the chloride diffusivity of fly ash concrete. This paper presents an investigation into the diffusion characteristics of chloride ions in fly ash concrete. Through experiment, the relationship between chloride diffusivity and curing age up to 1800 days is measured and the effects of curing age, water/binder ratio, aggregate volume fraction, and fly ash content (i.e., percentage of total cementitious material by mass) on chloride diffusivity are evaluated. It is found that the chloride diffusivity decreases with the increase of curing age, aggregate volume fraction, and fly ash content, but increases with the increase of water/binder ratio. In analytical modeling, an equivalent aggregate model is constructed and the equivalent interfacial transition zone (ITZ) thickness is derived analytically. With the equivalent aggregate model, three-phase fly ash concrete reduces to a two-phase composite material. By extending the Maxwell method, the chloride diffusivity of fly ash concrete is formulated. Finally, the validity of the analytical method is verified by experimental results. View Full-Text | - |
dc.language | eng | - |
dc.publisher | MDPIAG. The Journal's web site is located at http://www.mdpi.com/journal/materials/ | - |
dc.relation.ispartof | Materials | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | fly ash concrete | - |
dc.subject | chloride diffusivity | - |
dc.subject | experimental investigation | - |
dc.subject | analytical method | - |
dc.title | Experimental Investigation and Analytical Modeling of Chloride Diffusivity of Fly Ash Concrete | - |
dc.type | Article | - |
dc.identifier.email | Ye, HL: hlye@hku.hk | - |
dc.identifier.authority | Ye, HL=rp02379 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.3390/ma13040862 | - |
dc.identifier.pmid | 32074996 | - |
dc.identifier.pmcid | PMC7079598 | - |
dc.identifier.scopus | eid_2-s2.0-85082010721 | - |
dc.identifier.hkuros | 319207 | - |
dc.identifier.volume | 13 | - |
dc.identifier.issue | 4 | - |
dc.identifier.spage | article no. 862 | - |
dc.identifier.epage | article no. 862 | - |
dc.identifier.isi | WOS:000520419300053 | - |
dc.publisher.place | Switzerland | - |
dc.identifier.issnl | 1996-1944 | - |