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Service Life of Concrete during Chloride Ingress
conference contribution
posted on 2023-04-04, 23:33 authored by L Aldridge, Frank CollinsFrank Collins, Will GatesWill Gates, E Garcez, Jahidul Islam, Lucheng Huang, M Ong, F KapilaThe service life of reinforced concrete infrastructure in a marine environment can be predicted
from semi-empirical equations. This work describes what is needed to reliably predict service life of
reinforced concrete that is exposed to chlorides and more importantly what “new knowledge” is needed for
predicting the service life of concrete cover in the real world. There include; the effect of hydration suction,
assumptions about the critical chloride concentration that initiate steel corrosion, flaws in the Fick’s law
approach, modifications to paste structure by sea water, and significant differences between gel pores in
concretes made with and without supplementary cementitious materials. A research program has been
initiated to determine this knowledge including determinations of (i) pore closure (ii) water diffusion, & (iii)
interaction of paste with sea water, all being monitored as a function of cure time.
from semi-empirical equations. This work describes what is needed to reliably predict service life of
reinforced concrete that is exposed to chlorides and more importantly what “new knowledge” is needed for
predicting the service life of concrete cover in the real world. There include; the effect of hydration suction,
assumptions about the critical chloride concentration that initiate steel corrosion, flaws in the Fick’s law
approach, modifications to paste structure by sea water, and significant differences between gel pores in
concretes made with and without supplementary cementitious materials. A research program has been
initiated to determine this knowledge including determinations of (i) pore closure (ii) water diffusion, & (iii)
interaction of paste with sea water, all being monitored as a function of cure time.
History
Pagination
1 - 9Location
Gold Coast, QLD, AustraliaStart date
2013-10-16End date
2013-10-18ISBN-13
9781877040733Publication classification
E Conference publication; E1.1 Full written paper - refereedEditor/Contributor(s)
V Dao, P DuxTitle of proceedings
Proceedings 26th Biennial National Conference of the Concrete Institute of AustraliaUsage metrics
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