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Pro047

Performance based guideline for service life design of concrete for civil engineering structures - A proposal discussed in the Netherlands



Author(s): R.B. Polder, G. van der Wegen, M. Boutz
Paper category: Workshop
Book title: International RILEM Workshop on Performance Based Evaluation and Indicators for Concrete Durability
Editor(s): V. Baroghel-Bouny, C. Andrade, R. Torrent, K. Scrivener
ISBN: 978-2-912143-95-2
Pages: 31 - 39
Total Pages: 9
Language: English


Abstract: 
The present Dutch standards for concrete structures implicitly assume a service life of 50 years, while 80, 100 or even 200 years is increasingly required. A guideline is being developed for civil engineering structures in exposure classes XD or XS. If modern concrete technology requirements are met, initiation of corrosion due to chloride penetration is assumed to determine the service life. Following the DuraCrete methodology, the required performance is the absence of corrosion initiation with a reliability index β of 1.3 (10% probability of failure). This approach has been followed with the Westerschelde and Green Heart bored tunnels and structures in the Dutch High Speed railway line.
The guideline specifies a maximum value for the chloride diffusion coefficient of the concrete determined by the Rapid Chloride Migration (RCM) test, depending on the cover depth, the required service life and the cement type (Portland, Blast furnace slag and Portland/fly ash). Three design options options are available: (1) predefined concrete cover, (2) cover adapted to the cement type, both specifying a maximum RCM value; or (3) calculation using deterministic or probabilistic models.


Online publication: 2007
Publication Type: full_text
Public price (Euros): 0.00