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Analytical models for effective hydraulic sorptivity, diffusivity and conductivity of concrete with interfacial transition zone

journal contribution
posted on 16.10.2019, 00:00 by Hassan Baji, W Yang, C-Q Li, W Shi
This paper presents analytical models for evaluating effective hydraulic conductivity, diffusivity and sorptivity of concrete considering the properties of the Interfacial Transition Zone (ITZ) and the aggregate size distribution. Results of the proposed models compare well with the experimental results and those obtained from rigorous numerical Finite Element (FE) analysis. It is also found that a change of Interfacial Transition Zone (ITZ) properties has more influence on the effective hydraulic conductivity than it has on the effective hydraulic sorptivity. The significance of the proposed models is that they can estimate the hydraulic sorptivity and diffusivity of concrete by only knowing the hydraulic properties of mortar, effectively extricating the need for sophisticated and time-consuming FE analysis required for estimation of the effective hydraulic conductivity of concrete at the meso-scale. Furthermore, these models offer scientific insight into the effect of different components of concrete on its effective hydraulic properties. © 2019

Funding

Category 1 - Australian Competitive Grants (this includes ARC, NHMRC)

History

Volume

225

Start Page

555

End Page

568

Number of Pages

14

ISSN

0950-0618

Publisher

Elsevier, Netherlands

Peer Reviewed

Yes

Open Access

No

Acceptance Date

18/07/2019

External Author Affiliations

Wuhan University of Technology, China; Victoria UniversitY; RMIT University

Era Eligible

Yes

Journal

Construction and Building Materials