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Comparability of non-destructive moisture measurement techniques on masonry during simulated wetting

Orr, S; Viles, H; Leslie, A; Stelfox, D; (2016) Comparability of non-destructive moisture measurement techniques on masonry during simulated wetting. In: Hughes, JJ and Howind, T, (eds.) Science and Art: a Future for Stone: Proceedings of the 13th International Congress on the Deterioration and Conservation of Stone. (pp. pp. 431-438). University of West Scotland: Paisley, UK. Green open access

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Abstract

Detecting the presence of moisture in historical masonry is essential to understanding how a structure interacts with the environment, and diagnosing the potential for damage from a range of physical, chemical, and biological processes. In-situ, non-invasive diagnostic techniques have been developed in preference to methods that require irreversible modifications to a structure. These techniques include: electrical resistivity, microwaves, and infrared thermography. Independently, these approaches provide limited snapshots of surficial and internal moisture regimes; this project sought to assess the comparability of multiple techniques. Simulated post-rain spell drying was monitored over 48 h on limestone and sandstone monoliths in a controlled laboratory environment and also in ambient conditions on purpose-built masonry located in Oxfordshire, UK. Repeat measurements were taken using electrical resistance tomography (ERT), electrical and microwave moisture meters, and infrared thermography. Three aspects of comparability are discussed: i) data transformations and geological comparability, ii) depth-resolving meter readings, iii) the localised benefits of employing multiple technologies and instruments.

Type: Proceedings paper
Title: Comparability of non-destructive moisture measurement techniques on masonry during simulated wetting
Event: 13th International Congress on the Deterioration and Conservation of Stone
Location: Paisley, UK
Dates: 06 September 2016 - 10 September 2016
ISBN-13: 978-1-903978-57-3
Open access status: An open access version is available from UCL Discovery
Publisher version: https://sites.google.com/site/sc16test/home
Language: English
Additional information: Licenced under a Creative Commons Attribution 4.0 International License.
Keywords: moisture mapping, drying processes, non-destructive testing (NDT), instrument comparability, stone masonry
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of the Built Environment > Bartlett School Env, Energy and Resources
URI: https://discovery.ucl.ac.uk/id/eprint/10083126
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