Near infrared spectroscopic measurement of strain in rocks

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Abstract

The measurement of strain is a fundamental and widely studied parameter in engineering, rock mechanics, construction and materials testing. Contact sensors often used in these fields require contact with the target surface throughout the duration of a strain event. Non-contact methods typically require that that the measurement surface is prepared and often coated prior to testing. This paper considers the potential application of near infrared spectroscopy as a non-contact technique for the measurement of strain on natural surfaces. Excellent correlation was found between surface measurements of visible-NIR spectra and longitudinal strain taken during indirect Brazilian Disc Test for samples of sandstone, marble and basalt.
Original languageEnglish
Pages (from-to)432-440
Number of pages9
JournalJournal of Near Infrared Spectroscopy
Volume27
Issue number6
Early online date28 Aug 2019
DOIs
Publication statusPublished - 1 Dec 2019

Keywords

  • Strain Measurement
  • indirect tensile strength
  • near infrared spectroscopy
  • rock

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