Geopolymeric thermal conductivity sensors for surface-mounting onto concrete structures

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In this work, we present a novel, geopolymer temperature-sensing patch which can be heated using induction and used to infer thermal conductivity of the surrounding medium. The sensor patches, applied to concrete specimens, were fabricated by loading a geopolymer binder with 0 - 60 wt% ground magnetite. The magnetite content allowed the patches to be heated using an induction coil, while temperature profiles were monitored via changes in patch electrical impedance. Sensor patches were left uncoated, or were coated in surface-water, soil and sand. Each material provided a unique thermal signature which, with simple signal processing, could be used to reliably detect whether the patch was buried.
Original languageEnglish
Title of host publicationEnvironment, Efficiency and Economic Challenges for Concrete
Subtitle of host publicationProceedings
Place of PublicationDundee
Number of pages9
Publication statusPublished - 4 Jun 2016
Event9th International Concrete Conference 2016: Environment, Efficiency and Economic Challenges for Concrete - University of Dundee, Dundee , United Kingdom
Duration: 4 Jul 20166 Jul 2016


Conference9th International Concrete Conference 2016
Abbreviated titleCTU Congress
Country/TerritoryUnited Kingdom
Internet address


  • geopolymer
  • sensors
  • thermal
  • conductivity
  • deburial

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