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Durability design of reinforced concrete based on reliability of barrier function of cover concrete



Title: Durability design of reinforced concrete based on reliability of barrier function of cover concrete
Author(s): Md. S. Islam, T. Kishi
Paper category : conference
Book title: 2nd International Symposium on Service Life Design for Infrastructures
Editor(s): K. van Breugel, Guang Ye, Yong Yuan
Print-ISBN: 978-2-35158-096-7
e-ISBN: 978-2-35158-097-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 305 - 312
Total Pages: 8
Nb references: 11
Language: English


Abstract: Design procedures based on current specifications do not always ensure required service life, mostly because of the underestimated environmental influences and error at the time of construction. Moreover uncertainties in decision making, changes along with the property change, for concrete bridge management. Therefore, probabilistic approach to analyze is more realistic and rational to predict actual life time of infrastructure.
In service deterioration of concrete is mainly caused by quality of cover concrete. The quality of cover concrete is not only a function of w/c ratio, cement type but also is vitally influenced by construction procedure and curing. JSCE concrete committee TC335 has conducted non-destructive air permeability test for existing structures. It was found that air permeability does not give indications similar to strength characteristic indicates. It suggests that durability of concrete is not best indicated by strength only. Most past researchers had considered cover size and diffusion property as the design parameters and neglect the quality of cover such as water permeability in design.
In such context, the authors try to show the importance of water permeability for the assessment of structural health and propose to include water permeability as durability design parameter.


Online publication: 2011-04-20
Publication type : full_text
Public price (Euros): 0.00