Importance of water behavior on chloride ion ingress in cover concrete - A case study

Author(s): Md.S. Islam, T. Kishi
Paper category: Workshop
Book title: RILEM International workshop on performance-based specification and control of concrete durability
Editor(s): D. Bjegović, H. Beushausen, M. Serdar
ISBN: 978-2-35158-135-3
e-ISBN: 978-2-35158-136-0
Pages: 117 - 124
Total Pages: 8
Language: English

Abstract: 
Accurate prediction of service life of RC structure depends on the data collected from inspection. To understand the behavior of chloride penetration in the existing structure, core sample was taken and examination was carried out in the laboratory. Most common method for durability analysis of RC structure against chloride attack is the Fick law of diffusion where diffusion coefficient is treated as the base parameter. But inspection data of chloride profile from some real structures does not obey the rule of Fick law for the case of chloride ingress, suggesting the influence of a hidden parameter. In this study chloride ion profiles, absorption of water and liquid water front along with its variation for normal and fly ash concretes from a bank protection structure located in Okinawa were examined. Furthermore, Fick law of diffusion is modified with the inclusion of liquid water front and its variation and is verified using real data.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00