Abstract

Twenty four mortar mixes have been tested to assess the effects mix design factors on complex electrical resistivity. Of these mixes, 6 were conventional and 18 were conductive mixes containing varying quantities of either graphite or carbon fibre powder additions, which have been shown in previous studies to reduce the resistivity of cementitous materials. Complex resistance measurements from 20Hz-10MHz taken between 7 and 35 days after casting were analysed. Comparisons were made between the effects on complex resistivity of varying quantities of additions, water/cement ratio, and grit/sand ratio. In conventional mixes w/c was found to have more significance for complex resistance than g/s. Conductive additions were found to reduce complex resistivity magnitude as well as the influence of other mix factors. This novel and comprehensive comparison of the effects of three elements of mix design on complex resistance will be of use to anyone wishing to produce mortars or concrete for use in self-heating, self-sensing, or electrical property imaging contexts.
Original languageEnglish
JournalMagazine of Concrete Research
Early online date15 Feb 2019
DOIs
Publication statusE-pub ahead of print - 15 Feb 2019

Cite this

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title = "A multi-variable study of factors affecting the complex resistivity of conductive mortar",
abstract = "Twenty four mortar mixes have been tested to assess the effects mix design factors on complex electrical resistivity. Of these mixes, 6 were conventional and 18 were conductive mixes containing varying quantities of either graphite or carbon fibre powder additions, which have been shown in previous studies to reduce the resistivity of cementitous materials. Complex resistance measurements from 20Hz-10MHz taken between 7 and 35 days after casting were analysed. Comparisons were made between the effects on complex resistivity of varying quantities of additions, water/cement ratio, and grit/sand ratio. In conventional mixes w/c was found to have more significance for complex resistance than g/s. Conductive additions were found to reduce complex resistivity magnitude as well as the influence of other mix factors. This novel and comprehensive comparison of the effects of three elements of mix design on complex resistance will be of use to anyone wishing to produce mortars or concrete for use in self-heating, self-sensing, or electrical property imaging contexts.",
author = "Stephen Davey and Kevin Paine and Manuchehr Soleimani",
year = "2019",
month = "2",
day = "15",
doi = "10.1680/jmacr.18.00394",
language = "English",
journal = "Magazine of Concrete Research",
issn = "0024-9831",
publisher = "Thomas Telford (ICE Publishing)",

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TY - JOUR

T1 - A multi-variable study of factors affecting the complex resistivity of conductive mortar

AU - Davey, Stephen

AU - Paine, Kevin

AU - Soleimani, Manuchehr

PY - 2019/2/15

Y1 - 2019/2/15

N2 - Twenty four mortar mixes have been tested to assess the effects mix design factors on complex electrical resistivity. Of these mixes, 6 were conventional and 18 were conductive mixes containing varying quantities of either graphite or carbon fibre powder additions, which have been shown in previous studies to reduce the resistivity of cementitous materials. Complex resistance measurements from 20Hz-10MHz taken between 7 and 35 days after casting were analysed. Comparisons were made between the effects on complex resistivity of varying quantities of additions, water/cement ratio, and grit/sand ratio. In conventional mixes w/c was found to have more significance for complex resistance than g/s. Conductive additions were found to reduce complex resistivity magnitude as well as the influence of other mix factors. This novel and comprehensive comparison of the effects of three elements of mix design on complex resistance will be of use to anyone wishing to produce mortars or concrete for use in self-heating, self-sensing, or electrical property imaging contexts.

AB - Twenty four mortar mixes have been tested to assess the effects mix design factors on complex electrical resistivity. Of these mixes, 6 were conventional and 18 were conductive mixes containing varying quantities of either graphite or carbon fibre powder additions, which have been shown in previous studies to reduce the resistivity of cementitous materials. Complex resistance measurements from 20Hz-10MHz taken between 7 and 35 days after casting were analysed. Comparisons were made between the effects on complex resistivity of varying quantities of additions, water/cement ratio, and grit/sand ratio. In conventional mixes w/c was found to have more significance for complex resistance than g/s. Conductive additions were found to reduce complex resistivity magnitude as well as the influence of other mix factors. This novel and comprehensive comparison of the effects of three elements of mix design on complex resistance will be of use to anyone wishing to produce mortars or concrete for use in self-heating, self-sensing, or electrical property imaging contexts.

U2 - 10.1680/jmacr.18.00394

DO - 10.1680/jmacr.18.00394

M3 - Article

JO - Magazine of Concrete Research

JF - Magazine of Concrete Research

SN - 0024-9831

ER -