Estimating the electrical conductivity of cement paste pore solutions from OH-, K+ and Na+ concentrations

K. A. Snyder, X. Feng, B. D. Keen, Thomas O Mason

Research output: Contribution to journalArticle

100 Citations (Scopus)

Abstract

A proposed method for estimating the electrical conductivity of cement paste pore solution at 25 °C is based on the concentrations of OH-, K+ and Na+. The approach uses an equation that is a function of the solution ionic strength, and requires a single coefficient for each ionic species. To test the method, the conductivity of solutions containing mixtures of potassium hydroxide and sodium hydroxide with molar ratios of 4:1, 2:1 and 1:1, and having ionic strengths varying from 0.15 to 2.00 mol/l were measured in the laboratory and compared to predicted values. The proposed equation predicts the conductivity of the solutions to within 8% over the concentration range investigated. By comparison, the dilute electrolyte assumption that conductivity is linearly proportional to concentration is in error by 36% at 1 mol/l and in error by 55% at 2 mol/l. The significance and utility of the proposed equation is discussed in the context of predicting ionic transport in cement-based systems. Published by Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)793-798
Number of pages6
JournalCement and Concrete Research
Volume33
Issue number6
DOIs
Publication statusPublished - Jun 2003

Fingerprint

Ointments
Cements
Ionic strength
Potassium hydroxide
Sodium Hydroxide
Electrolytes
Sodium
Electric Conductivity
hydroxide ion

Keywords

  • Alkalis
  • Electrical properties
  • Modeling
  • Pore solution
  • Transport properties

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Ceramics and Composites

Cite this

Estimating the electrical conductivity of cement paste pore solutions from OH-, K+ and Na+ concentrations. / Snyder, K. A.; Feng, X.; Keen, B. D.; Mason, Thomas O.

In: Cement and Concrete Research, Vol. 33, No. 6, 06.2003, p. 793-798.

Research output: Contribution to journalArticle

@article{901237e38cc44eb79bd11a1052a53332,
title = "Estimating the electrical conductivity of cement paste pore solutions from OH-, K+ and Na+ concentrations",
abstract = "A proposed method for estimating the electrical conductivity of cement paste pore solution at 25 °C is based on the concentrations of OH-, K+ and Na+. The approach uses an equation that is a function of the solution ionic strength, and requires a single coefficient for each ionic species. To test the method, the conductivity of solutions containing mixtures of potassium hydroxide and sodium hydroxide with molar ratios of 4:1, 2:1 and 1:1, and having ionic strengths varying from 0.15 to 2.00 mol/l were measured in the laboratory and compared to predicted values. The proposed equation predicts the conductivity of the solutions to within 8{\%} over the concentration range investigated. By comparison, the dilute electrolyte assumption that conductivity is linearly proportional to concentration is in error by 36{\%} at 1 mol/l and in error by 55{\%} at 2 mol/l. The significance and utility of the proposed equation is discussed in the context of predicting ionic transport in cement-based systems. Published by Elsevier Science Ltd.",
keywords = "Alkalis, Electrical properties, Modeling, Pore solution, Transport properties",
author = "Snyder, {K. A.} and X. Feng and Keen, {B. D.} and Mason, {Thomas O}",
year = "2003",
month = "6",
doi = "10.1016/S0008-8846(02)01068-2",
language = "English",
volume = "33",
pages = "793--798",
journal = "Cement and Concrete Research",
issn = "0008-8846",
publisher = "Elsevier Limited",
number = "6",

}

TY - JOUR

T1 - Estimating the electrical conductivity of cement paste pore solutions from OH-, K+ and Na+ concentrations

AU - Snyder, K. A.

AU - Feng, X.

AU - Keen, B. D.

AU - Mason, Thomas O

PY - 2003/6

Y1 - 2003/6

N2 - A proposed method for estimating the electrical conductivity of cement paste pore solution at 25 °C is based on the concentrations of OH-, K+ and Na+. The approach uses an equation that is a function of the solution ionic strength, and requires a single coefficient for each ionic species. To test the method, the conductivity of solutions containing mixtures of potassium hydroxide and sodium hydroxide with molar ratios of 4:1, 2:1 and 1:1, and having ionic strengths varying from 0.15 to 2.00 mol/l were measured in the laboratory and compared to predicted values. The proposed equation predicts the conductivity of the solutions to within 8% over the concentration range investigated. By comparison, the dilute electrolyte assumption that conductivity is linearly proportional to concentration is in error by 36% at 1 mol/l and in error by 55% at 2 mol/l. The significance and utility of the proposed equation is discussed in the context of predicting ionic transport in cement-based systems. Published by Elsevier Science Ltd.

AB - A proposed method for estimating the electrical conductivity of cement paste pore solution at 25 °C is based on the concentrations of OH-, K+ and Na+. The approach uses an equation that is a function of the solution ionic strength, and requires a single coefficient for each ionic species. To test the method, the conductivity of solutions containing mixtures of potassium hydroxide and sodium hydroxide with molar ratios of 4:1, 2:1 and 1:1, and having ionic strengths varying from 0.15 to 2.00 mol/l were measured in the laboratory and compared to predicted values. The proposed equation predicts the conductivity of the solutions to within 8% over the concentration range investigated. By comparison, the dilute electrolyte assumption that conductivity is linearly proportional to concentration is in error by 36% at 1 mol/l and in error by 55% at 2 mol/l. The significance and utility of the proposed equation is discussed in the context of predicting ionic transport in cement-based systems. Published by Elsevier Science Ltd.

KW - Alkalis

KW - Electrical properties

KW - Modeling

KW - Pore solution

KW - Transport properties

UR - http://www.scopus.com/inward/record.url?scp=0038034120&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0038034120&partnerID=8YFLogxK

U2 - 10.1016/S0008-8846(02)01068-2

DO - 10.1016/S0008-8846(02)01068-2

M3 - Article

AN - SCOPUS:0038034120

VL - 33

SP - 793

EP - 798

JO - Cement and Concrete Research

JF - Cement and Concrete Research

SN - 0008-8846

IS - 6

ER -