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Estimating the Electrical Conductivity of Alkaline Cementitious Pore Solutions

Published

Author(s)

Kenneth A. Snyder, X Feng

Abstract

A method is proposed for estimating the electrical conductivity of cementitious pore solutions. The method is based on an equation that is a function of the solution ionic strength, and requires a single empirical coefficient for each ionic species. As a test of the method, the conductivity of solutions containing mixtures of potassium hydroxide and sodium hydroxide, in molar ratios from 4:1 to 1:1, at ionic strengths varying from 0.15 to 2.00 eq. 2 mol/L, were measured in the laboratory and compared to predicted values. The proposed equation, although simplistic in its avoidance of ion-ion interaction parameters, predicted the conductivity of the solutions to within 8 % over the concentration range investigated. The significance and utility of the equation is discussed in the context of predicting ionic diffusive transport in cementitious systems.
Citation
Cement and Concrete Research
Volume
33
Issue
No. 6

Keywords

alkaline, building technology, cement, electrical conductivity, pore solutions

Citation

Snyder, K. and Feng, X. (2003), Estimating the Electrical Conductivity of Alkaline Cementitious Pore Solutions, Cement and Concrete Research, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860391 (Accessed April 20, 2024)
Created May 31, 2003, Updated October 12, 2021