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Pro066

Predicting durability and residual service life of reinforced concrete structures



Authors: V. Dorf, I. Krol, R. Krasnovsky
Paper category: conference
Book title: Concrete Durability and Service Life Planning – ConcreteLife’09
Editor(s): K. Kovler
Print ISBN: 978-2-35158-074-5
e-ISBN: 978-2-35158-085-1
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 580 – 586
Total Pages: 7
Language: English


Abstract: Durability of the reinforced concrete structures is determined by durability of their basic elements – concrete and rebars. If structures have been operated under non-design conditions or a structure service life has to be extended, the residual service life of these structures should be determined.
Residual service life of reinforced concrete structures may be predicted analytically by functions that take into account the inherent random variation of concrete strength in time and influence of aggressive factors on physical and mechanical properties of concrete and rebars. Design requirements and results of the evaluation of structures in situ serve as the input data for calculations.
This approach was applied for the prediction of the residual service life of reinforced concrete structures of a Nuclear Power Plant (NPP) located at Ukraine and operated under non-design conditions (more aggressive conditions than those considered in the design stage) during 20 years.
In the evaluation as-built documents formalized during construction have been analyzed in order to determine initial characteristics of the reinforced concrete constructions. Depth of concrete carbonation, level of effects of aggressive media on concrete and rebars and reduction of rebar diameter caused by metal corrosion has been determined by the moment of inspection.
All characteristics were determined with 0.95-probability in accordance with codes and standards effective in Russian Federation.


Online publication: 2012-05-16
Publication Type: full_text
Public price (Euros): 0.00