Version 1
: Received: 12 October 2020 / Approved: 14 October 2020 / Online: 14 October 2020 (10:48:58 CEST)
How to cite:
Kenny, A.; Katz, A. Cement Composition’s Effect on Pore Solution Composition and on Electrochemical Behavior of Reinforcing Steel. Preprints2020, 2020100300
Kenny, A.; Katz, A. Cement Composition’s Effect on Pore Solution Composition and on Electrochemical Behavior of Reinforcing Steel. Preprints 2020, 2020100300
Kenny, A.; Katz, A. Cement Composition’s Effect on Pore Solution Composition and on Electrochemical Behavior of Reinforcing Steel. Preprints2020, 2020100300
APA Style
Kenny, A., & Katz, A. (2020). Cement Composition’s Effect on Pore Solution Composition and on Electrochemical Behavior of Reinforcing Steel. Preprints. https://doi.org/
Chicago/Turabian Style
Kenny, A. and Amnon Katz. 2020 "Cement Composition’s Effect on Pore Solution Composition and on Electrochemical Behavior of Reinforcing Steel" Preprints. https://doi.org/
Abstract
Reinforcement corrosion due to chloride attack is of major economic significance for reinforced concrete structures. Pozzolans are known to inhibit corrosion initiation mainly by reducing concrete permeability. However, there is evidence in the literature that changes in the chemical environment in the concrete due to the pozzolans may be creating improved corrosion resistance, by themselves. In this study, the composition of a pore solution of mature hydrated cement paste containing silica-fume at different ratios was analyzed. The electrochemical behavior of reinforcing steel was studied in simulated pore solutions with silicate concentrations ranging from 0 to 35.6 mM, which are within the concentration range found by pore solution extraction to be up to 49 mM. Polished reinforcing steel specimens were used for cyclic voltammetry in simulated pore solutions with chloride concentrations of 10-20%. Better corrosion protection was found with increasing silicate concentration up to 3.56 mM. This was indicated by lower corrosion currents both in the passive state and after anodic activation. Anodic activation of steel in a 35.6 mM silicate solution with 20% NaCl yielded a higher potential than the anterior potential.
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.