Bonding strength evolution of the steel-concrete interface exposed to high concentration CO2 up to 1000 kPa partial pressure
Source abstract
Abstract
In order to investigate the effect of CO 2 concentration and water on bonding strength evolution of the steel-concrete interface, this paper studied the carbonation process at the steel-concrete interface of composite samples in dry gas, pure water and 70% relative humidity (RH) environments with 100 kPa, 500 kPa and 1000 kPa CO 2 partial pressures. The results showed that the formation of aragonite and Fe(OH) 3 at the interface had a negative effect on the bonding strength, while the formation of calcite at the interface had a positive effect on the bonding strength. Also, the reaction environment had a noticeable effect on Fe-bearing corrosion products formed at the interface. In summary, if the concentration and the pressure of CO 2 reach a certain level (i.e., 100% concentration and 1000 kPa partial pressure or higher) and abundant water is present, the CO 2 -induced carbonation of concrete and corrosion of steel can eventually lead to damage at the steel-concrete interface.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Concrete and Cement Materials Research · Concrete Corrosion and Durability · Corrosion Behavior and Inhibition
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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