Experimental study on time-dependent DC resistivity of cement-based material considering microstructure and ion concentration

Peng, Yizhan; Gong, Fuyuan; Wang, Zhao; Zhao, Youcai; Jin, Weiliang; Meng, Tao; Maekawa, Koichi

doi:10.1016/j.conbuildmat.2022.129830

Cited by 1 publication

(1 citation statement)

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“…The qualitative verification includes the multi-ion kinetics under macro-cell circuit which has been achieved in previous study (Wang et al 2022) as well as the macro-cell corrosion profiles which is conducted in current paper. For future validation with real concrete materials, precise values of parameters or model modification are necessary based on the experimental evidence (Peng et al 2023), which will be the future work.…”

Section: Simulation Modelsmentioning

confidence: 99%

Space Averaging of Electric Field accompanying Corrosion of Reinforcement and its Verification by Pseudo-Concrete

Wang

Maekawa

Gong

2023

ACT

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This paper aims to verify a space-averaged electric filed simulation, where the whole surfaces of reinforcing bars are blended into the 3D finite volume for identifying the electric potential to drive the macro-cell corrosion of structural concrete. Experimental verification is conducted with transparent pseudo-concrete, which has chemical pore-solutions similar to those of concrete, and with which the location of anodic poles accompanying brownish rusts and the cathodic ones surrounded by hydrogen bubbles may be visually identified. The proposed electro-chemical analysis platform to be integrated with ion transport and equilibrium is adopted for full consistency with dispersed reinforcing bars. Global macro-cell corrosions of tunnel mockup and reinforcement layers induced by electric current leakage are verified quantitatively with dispersed multi-ion concentration as well as corrosion profile.

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Section: Simulation Modelsmentioning

confidence: 99%