Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Study of Concrete Reinforcement with the Addition of Pozolanica against the Penetration of Chlorites through Electrochemical Impedance Spectroscopy

Version 1 : Received: 31 October 2023 / Approved: 1 November 2023 / Online: 2 November 2023 (10:14:37 CET)

A peer-reviewed article of this Preprint also exists.

Domínguez, A.O.; Filho, R.D.T.; Gomes, J.A.C.P.; Silva, R.S.; de Souza, E.A.; Barbosa da Silva, A. Study of Concrete Reinforcement with the Addition of Pozzolans against the Penetration of Chlorides Using Electrochemical Impedance Spectroscopy. Constr. Mater. 2024, 4, 194-215. Domínguez, A.O.; Filho, R.D.T.; Gomes, J.A.C.P.; Silva, R.S.; de Souza, E.A.; Barbosa da Silva, A. Study of Concrete Reinforcement with the Addition of Pozzolans against the Penetration of Chlorides Using Electrochemical Impedance Spectroscopy. Constr. Mater. 2024, 4, 194-215.

Abstract

The present work analyzes the behavior in terms of corrosion resistance of three reinforced concrete formulations over a period of 1 year. The samples were accompanied by creating a monitoring methodology using the Electrochemical Impedance Spectroscopy (EIE) technique, working only with the real component over time. Three mixtures were used, one conventional without pozzolanic addition (REF) and two others with pozzolanic additions, rice husk ash (RCA) and metakaolin (MK). Prototypes were created and exposed to the action of a 165g/l NaCl sodium chloride solution. The characterization of the materials was carried out by determining the chloride diffusion profile (ASTM 1556), analyzing images using tomography and with the support of analytical techniques such as x-ray fluorescence and x-ray diffraction. The monitoring methodology using the EIE demonstrated the positive effect of the insertion of pozzolans, rice husk ash (RCA) and metakaolin (MK), by delaying the process of chloride diffusion in the concrete, resulting in greater resistance to corrosion. The EIE also showed that the active mineral addition in concrete, of aluminum-silicic composition (MK), had a predominant protective effect on the steel//concrete interface against the attack of chloride ions.

Keywords

reinforced concrete; corrosion; chlorides; pozzolan.

Subject

Engineering, Civil Engineering

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.