Life cycle design after repair of chloride attacked concrete structures
Author(s): S. Miyazato, T. Ueda, S. Nojima
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
Pages: 565 - 572
Total Pages: 8
A research committee on “corrosion evaluation and protection technology of reinforcing steel in concrete” was established in 2007 by the Japan Society of Civil Engineers. The committee, which was composed of 59 researchers including Chairman Koji Takewaka, investigated some important issues over six years. The working group discussed an effective maintenance scenario based on the performance and cost after repair.
In this paper, a system is described that can be used to select an appropriate method and schedule for the repair of concrete structures. Firstly, the chloride ingress and steel corrosion after the repair are calculated. Based on the results, we determine when and how concrete deteriorates. Next, based on the state of the deterioration and the experience of the repair, a maintenance plan for changing the type and frequency of the inspection is designed. Here, a careful inspection is planned if the state of the structure is dangerous. That is, the frequency of the inspection is increased if the deterioration progresses and/or the actual results of the repair are poor. Finally, the inspection and repair costs over the lifespan are added and the life cycle cost is calculated. Based on the results, a reasonable maintenance program can be designed.
Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00