Title: Practical Measurement of Pore Solution Resistivity in Fresh Mixtures

Author(s): Joseph H. Biever, Krishna Siva Teja Chopperla, O. Burkan Isgor, and W. Jason Weiss

Publication: Materials Journal

Volume: 120

Issue: 5

Appears on pages(s): 43-52

Keywords: conductivity; fresh paste; fresh properties; pore solution; pore solution extraction; resistivity

DOI: 10.14359/51738903

Date: 9/1/2023

Abstract:
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.