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Practical Measurement of Pore Solution Resistivity in Fresh Mixtures

By: Material type: ArticleArticleDescription: 43-52 pISSN:
  • 0889-325x
Subject(s): Online resources: In: ACI Materials JournalSummary: This study compares techniques to extract pore solution from fresh mixtures to measure the resistivity of the extracted solution. The centrifuge approach for extracting pore solution and conductivity probe for determining pore solution resistivity are practical and have the potential to be used in the field. Pore solution extraction can be done between 30 and 90 minutes after mixing without a statistically significant difference in the measured resistivity. A practical method is proposed to determine the pore solution resistivity from the diluted cement paste samples when the extracted pore solution quantity is not adequate for accurate measurements with a conductivity probe.
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Articles Articles Periodical Section Vol.120, No.5 (Sept.2023) Available

This study compares techniques to extract pore solution from fresh mixtures to measure the resistivity of the extracted solution. The centrifuge approach for extracting pore solution and conductivity probe for determining pore solution resistivity are practical and have the potential to be used in the field. Pore solution extraction can be done between 30 and 90 minutes after mixing without a statistically significant difference in the measured resistivity. A practical method is proposed to determine the pore solution resistivity from the diluted cement paste samples when the extracted pore solution quantity is not adequate for accurate measurements with a conductivity probe.