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Estimating the Electrical Conductivity of Alkaline Cementitious Pore Solutions



Kenneth A. Snyder, X Feng


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.
Cement and Concrete Research
No. 6


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


Snyder, K. and Feng, X. (2003), Estimating the Electrical Conductivity of Alkaline Cementitious Pore Solutions, Cement and Concrete Research, [online], (Accessed April 20, 2024)
Created May 31, 2003, Updated October 12, 2021