Corrosion of naturally corroded, plain reinforcing bars
Paper in proceeding, 2020
Reinforced Concrete is known to be susceptible to corrosion damages. Corrosion, by reducing strength and ductility of the reinforcing bar and modifying the steel/concrete interface, hinders the overall safety of the structure. This work investigates the bond of naturally corroded, plain reinforcing bars. Specimens were taken from an 80-year-old bridge and tested using pull-out and 3-point bending tests. Additionally , neutron and X-ray tomography is used to observe the distribution of corrosion products. Results highlight the influence of casting position on the bond of plain bars. Specifically, the distribution of corrosion products is influenced by the bleeding zone underneath top-cast bars. Corrosion products are shown to deposit in macro-pores and to adhere to the bar.
Corrossion
Cracks
Concrete structures
Author
Samanta Robuschi
Chalmers, Architecture and Civil Engineering, Structural Engineering
Ignasi Fernandez
Chalmers, Architecture and Civil Engineering, Structural Engineering
Karin Lundgren
Chalmers, Architecture and Civil Engineering, Structural Engineering
Proceedings of the fib CACRCS DAYS 2020 - Capacity Assessment of Corroded Reinforced Concrete Structures
2617-4820 (ISSN)
978-2-940643-10-3 (ISBN)
fib CACRCS DAYS 2020: Capacity Assessment of Corroded Reinforced Concrete Structures
Parma, ,
Parma, ,
Assessment of the load-carrying capacity of existing structures with corroded smooth reinforcement bars
Swedish Transport Administration (TRV 2017/39084 6454), 2017-01-01 -- 2020-12-31.
Formas (2016-00568), 2017-01-01 -- 2020-12-31.
Subject Categories
Other Materials Engineering
Metallurgy and Metallic Materials
Building Technologies