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An analytical solution for hydraulic conductivity of concrete considering properties of the Interfacial Transition Zone (ITZ)

journal contribution
posted on 03.09.2019, 00:00 by Hassan BajiHassan Baji, C-Q Li
As a composite material, hydraulic conductivity of concrete depends on conductivity of its components that are the mortar, aggregates and the Interfacial Transition Zone (ITZ). Since hydraulic conduction is analogous to heat and electrical conduction, analytical models from these analogous areas relating effective conductivity of composite to conductivity of its components can be used to find the effective hydraulic conductivity of concrete as a function of properties of its components, i.e., aggregate, mortar and the ITZ. However, effect of the conduction in the ITZ has not been considered in these models. This paper presents an analytical solution for the hydraulic conductivity of concrete as a three-phase composite material. The solution is an extension to the model originally proposed for conduction of composite media with randomly suspended spheres. Results of the proposed model compare well against the experimental results and those obtained from rigorous numerical analysis using the Finite Element (FE) method. The principal significance of this study lies in the development of a versatile analytical model that can be employed as a quick tool for assessment of hydraulic conductivity of concrete without the need for sophisticated FE models at the meso-scale level. It offers more insight into effect of different components of concrete on its overall conductivity. © 2018 Elsevier Ltd

Funding

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

History

Volume

91

Start Page

1

End Page

10

Number of Pages

10

eISSN

1873-393X

ISSN

0958-9465

Publisher

Pergamon Press, UK

Peer Reviewed

Yes

Open Access

No

Acceptance Date

13/04/2018

External Author Affiliations

RMIT University

Era Eligible

Yes

Journal

Cement and Concrete Composites