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An Infrared Thermography Approach to Evaluate the Strength of a Rock Cliff
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SYSNO ASEP 0542525 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title An Infrared Thermography Approach to Evaluate the Strength of a Rock Cliff Author(s) Loche, M. (CZ)
Scaringi, G. (CZ)
Blahůt, Jan (USMH-B) RID, ORCID, SAI
Melis, M.T. (IT)
Funedda, A. (IT)
Da Pelo, S. (IT)
Erbi, I. (IT)
Deiana, G. (IT)
Meloni, M.A. (IT)
Cocco, F. (IT)Number of authors 10 Article number 1265 Source Title Remote Sensing. - : MDPI
Roč. 13, č. 7 (2021)Number of pages 13 s. Publication form Online - E Language eng - English Country CH - Switzerland Keywords compressive strength ; infrared thermography ; rebound hammer ; cooling rate index Subject RIV DB - Geology ; Mineralogy OECD category Geology Method of publishing Open access Institutional support USMH-B - RVO:67985891 UT WOS 000638803000001 DOI 10.3390/rs13071265 Annotation The mechanical strength is a fundamental characteristic of rock masses that can be empirically related to a number of properties and to the likelihood of instability phenomena. Direct field acquisition of mechanical information on tall cliffs, however, is challenging, particularly in coastal and alpine environments. Here, we propose a method to evaluate the compressive strength of rock blocks by monitoring their thermal behaviour over a 24-h period by infrared thermography. Using a drone-mounted thermal camera and a Schmidt (rebound) hammer, we surveyed granitoid and aphanitic blocks in a coastal cliff in south-east Sardinia, Italy. We observed a strong correlation between a simple cooling index, evaluated in the hours succeeding the temperature peak, and strength values estimated from rebound hammer test results. We also noticed different heating-cooling patterns in relation to the nature and structure of the rock blocks and to the size of the fractures. Although further validation is warranted in different morpho-lithological settings, we believe the proposed method may prove a valid tool for the characterisation of non-directly accessible rock faces, and may serve as a basis for the formulation, calibration, and validation of thermo-hydro-mechanical constitutive models. Workplace Institute of Rock Structure and Mechanics Contact Iva Švihálková, svihalkova@irsm.cas.cz, Tel.: 266 009 216 Year of Publishing 2022 Electronic address https://www.mdpi.com/2072-4292/13/7/1265
Number of the records: 1