Tools
Tools
O'FLAHERTY, Fin, VAN NGUYEN, Chinh, LAMBERT, Paul, MANGAT, Pal and JONES, Graeme (2018). Optimised cathodic protection design for maximum bond performance in reinforced concrete. Materials and Corrosion / Werkstoffe und Korrosion, 69 (9), 1151-1162.
|
PDF
OFlaherty-OptimisingCathodicProtectionDesign(AM).pdf - Accepted Version All rights reserved. Download (458kB) | Preview |
Abstract
The influence of the long term effects of impressed current cathodic protection (ICCP) on the bond strength is investigated. A total of 16 pull-out specimens were divided into four series and the steel bars pre-corroded to target degrees of 0 % (control), 1 %, 2 % and 5 % weight loss. Four levels of ICCP current density ranging from approximately 0 (control) to over 1000 µA/cm2 were applied to each series. These are considerably higher than the levels typically used in practice, which rarely exceed 2 µA/cm2, but were used to replicate long term application within a reasonable timescale. Following pull-out tests, the values of bond load were determined. The analysis accounts for the accelerated ICCP by relating the total charge to the steel reinforcement in coulombs (current x time) to the bond values and migration of chloride ions. The results show that although some loss in bond is evident from the ICCP, an optimised current density can be applied to a real structure without affecting the as-designed bond strength in the long term e.g. ≤ 0.65 µA/cm2 for an ICCP duration of 70 years. Application of the same current density reduces the chloride concentration from around the steel irrespective of the degree of corrosion.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | accelerated corrosion, accelerated CP, bond, cathodic prevention, cathodic protection, chloride migration, design life, ICCP, total charge |
| Research Institute, Centre or Group - Does NOT include content added after October 2018: | Materials and Engineering Research Institute > Structural Materials and Integrity Research Centre > Centre for Infrastructure Management |
| Departments - Does NOT include content added after October 2018: | Faculty of Science, Technology and Arts > Department of Engineering and Mathematics |
| Identification Number: | https://doi.org/10.1002/maco.201810116 |
| Page Range: | 1151-1162 |
| Depositing User: | Fin O'Flaherty |
| Date Deposited: | 27 Mar 2018 08:33 |
| Last Modified: | 18 Mar 2021 05:26 |
| URI: | https://shura.shu.ac.uk/id/eprint/19031 |
Actions (login required)
 |
View Item |
Downloads
Downloads per month over past year