Effect of Superabsorbent Polymer as Partial Replacement of Portland Cement on Electrochemical Corrosion Behavior of Carbon Steel Rebar in Artificial Seawater
International Journal of Electrochemical Science, ISSN: 1452-3981, Vol: 16, Issue: 4, Page: 21045
2021
- 2Citations
- 12Captures
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Article Description
The effect of superabsorbent polymer (SAP) powder and fly ash (FA) content into concrete structures on the corrosion behavior of carbon steel rebar was studied. SAPs were applied at various volume fractions (0.1%, 0.2%, and 0.4%). All the SAP-modified concrete samples contained 15wt% FA as a cement replacement. The electrochemical analysis was done by electrochemical impedance spectroscopy (EIS) and polarization measurement assessments in 3.5wt% NaCl as artificial seawater. The EIS results fitted by an appropriate equivalent electrical circuit indicated that the highest corrosion resistance was achieved for the SAP4 mixture. Polarization analysis revealed that the SAP4 sample has the lowest corrosion current density, more positive corrosion potential with high corrosion protection. These electrochemical results show that the simultaneous addition of FA and SAPs admixtures in concrete structures improve the concrete durability and corrosion resistance of carbon steel rebar after being exposed to an aggressive environment by preventing the rebar surface from reaching the corrosive ions.
Bibliographic Details
Elsevier BV
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