A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Long-term durability of underground reinforced concrete pipes in natural chloride and carbonation environments
Highlights Corrosion rate of reinforcements depends on concrete cover in chloride environment. No cracking observed after 70 years in concrete exposed to carbonation environment. A new model includes the expansion coefficient of rusts formed in low oxygen environments. High humidity in concrete pipes greatly delays oxygen diffusion and corrosion process. For chloride and carbonation, 25 mm and 20 mm concrete covers respectively suffice for 100-year service-life of pipelines.
Abstract In this study, concrete cores extracted from different underground reinforced concrete pipelines exposed to chloride and carbonation environments were investigated. The age of the pipelines was ranging from 43 to 70 years. The main purpose of this study was to determine the minimum concrete cover to reinforcement allowing 100 years of service life with respect to the exposure conditions of the pipelines. Chloride content at the steel–concrete interface, the carbonation depth, the reinforcement corrosion and other concrete durability related properties were assessed. The service-life of the pipelines was thoroughly discussed based on both corrosion rates measured and corrosion induced concrete cracking observed. The high humidity in concrete pipes is suspected to greatly delay oxygen renewal at the steel–concrete interface. Concrete cover of 25 mm and 20 mm seem adequate for 100 years of service life in chloride and carbonation environments respectively.
Long-term durability of underground reinforced concrete pipes in natural chloride and carbonation environments
Highlights Corrosion rate of reinforcements depends on concrete cover in chloride environment. No cracking observed after 70 years in concrete exposed to carbonation environment. A new model includes the expansion coefficient of rusts formed in low oxygen environments. High humidity in concrete pipes greatly delays oxygen diffusion and corrosion process. For chloride and carbonation, 25 mm and 20 mm concrete covers respectively suffice for 100-year service-life of pipelines.
Abstract In this study, concrete cores extracted from different underground reinforced concrete pipelines exposed to chloride and carbonation environments were investigated. The age of the pipelines was ranging from 43 to 70 years. The main purpose of this study was to determine the minimum concrete cover to reinforcement allowing 100 years of service life with respect to the exposure conditions of the pipelines. Chloride content at the steel–concrete interface, the carbonation depth, the reinforcement corrosion and other concrete durability related properties were assessed. The service-life of the pipelines was thoroughly discussed based on both corrosion rates measured and corrosion induced concrete cracking observed. The high humidity in concrete pipes is suspected to greatly delay oxygen renewal at the steel–concrete interface. Concrete cover of 25 mm and 20 mm seem adequate for 100 years of service life in chloride and carbonation environments respectively.
Long-term durability of underground reinforced concrete pipes in natural chloride and carbonation environments
Nguyen, Quang Dieu (author) / Castel, Arnaud (author)
2023-06-19
Article (Journal)
Electronic Resource
English
Long-term durability of onshore coated concrete —chloride ion and carbonation effects
| Springer Verlag | 2016
Durability of concrete pipes subjected to combined steam and carbonation curing
| Online Contents | 2011
Durability of concrete pipes subjected to combined steam and carbonation curing
| British Library Online Contents | 2011