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Archaeological Mortar Characterization Using Laser-Induced Breakdown Spectroscopy (LIBS) Imaging Microscopy.

Sarah Richiero1,2, Claudio Sandoval1,3, Christine Oberlin2

  • 1Université de Lyon, Université Claude Bernard Lyon 1, CNRS, 27098Institut Lumiére Matiére, VILLEURBANNE, France.

Applied Spectroscopy
|February 14, 2022
PubMed
Summary
This summary is machine-generated.

This study used laser-induced breakdown spectroscopy (LIBS) to analyze ancient lime mortars from France and Italy. The technique revealed detailed elemental composition, aggregate properties, and granulometry, aiding cultural heritage research.

Keywords:
Lime mortararchaeological characterizationelemental imagingmicro-laser-induced breakdown spectroscopy

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Area of Science:

  • Archaeometry
  • Materials Science
  • Geochemistry

Background:

  • Lime mortar, a historical building material, varies significantly in composition based on origin and use.
  • Understanding these variations is crucial for building archaeology and cultural heritage preservation.
  • Archaeological mortars offer insights into past construction techniques and material sourcing.

Purpose of the Study:

  • To characterize the elemental composition of archaeological lime mortar samples.
  • To investigate the potential of laser-induced breakdown spectroscopy (LIBS) for archaeometric analysis.
  • To extract aggregate properties like granulometry and circularity from mortar samples.

Main Methods:

  • Utilized a micro-laser-induced breakdown spectroscopy (µ-LIBS) instrument for elemental analysis.
  • Applied image processing and mask creation for data extraction.
  • Analyzed three lime mortar samples from diverse geographical locations (Angers, Dardilly, Pompeii) and building types (cathedral, aqueduct, house).

Main Results:

  • Successfully characterized the elemental composition of the lime mortars.
  • Identified the lime signature and the nature of the aggregates within the samples.
  • Quantified aggregate granulometry and circularity using image analysis.

Conclusions:

  • Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for the archaeometric analysis of historical lime mortars.
  • The study demonstrates LIBS's capability to provide detailed insights into mortar composition and aggregate characteristics.
  • This research contributes valuable data for building archaeology and the conservation of cultural heritage.