Corrosion of naturally corroded, plain reinforcing bars
Paper i 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.

Concrete structures

Cracks

Corrossion

Författare

Samanta Robuschi

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Ignasi Fernandez

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Karin Lundgren

Chalmers, Arkitektur och samhällsbyggnadsteknik, Konstruktionsteknik

Proceedings of the fib CACRCS DAYS 2020 - Capacity Assessment of Corroded Reinforced Concrete Structures

2617-4820 (ISSN)

fib CACRCS DAYS 2020: Capacity Assessment of Corroded Reinforced Concrete Structures
Parma, ,

Bedömning av bärförmåga hos befintliga betongkonstruktioner med korroderade släta armeringsstänger

Formas (2016-00568), 2017-01-01 -- 2020-12-31.

Trafikverket (TRV 2017/39084 6454), 2017-01-01 -- 2020-12-31.

Ämneskategorier

Annan materialteknik

Metallurgi och metalliska material

Husbyggnad

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2021-06-15