Sourcing limestone masonry for restoration of historic buildings: a spectroscopic study
Journal article
Firth, C., Hopkinson, L., Rutt, K., Kristova, P. and Blows, J. 2015. Sourcing limestone masonry for restoration of historic buildings: a spectroscopic study. Journal of Cultural Heritage. 16 (6), pp. 822-830. https://doi.org/10.1016/j.culher.2015.03.007
Authors | Firth, C., Hopkinson, L., Rutt, K., Kristova, P. and Blows, J. |
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Abstract | This study presents a combined Fourier transform (FT) mid-infrared, laser Raman and Commission internationale d’éclairage (CIE) L*a*b*system analysis of quarry-derived impure limestone and fallen masonry from a medieval listed building situated in the south east of England, to ascertain how spectroscopic information can be collectively employed to identify the most exacting possible replacement stone source.Data shows that subtle differences in [Al] and [Fe3+] octahedral and tetrahedral site occupancy in glauconite group clays registered in the mid-infrared [3530 cm−1/3620 cm−1] absorption ratio exerts some influence on L*Cab*hab*values. Increases in L*and Cabare associated with decreasing clay content. Theoverall weakness of correlations between infrared and visible range spectral attributes indicates multiple contributing sources to overall color. Evidence indicates that the degree of laser Raman induced background noise is related to the overall calcite content and that activators of fluorescence at 785 nmexcitation wave length may also contribute to rock color. The results are utilized to define closest matching quarry samples to the fallen masonry. |
Keywords | Mid-infrared Raman; CIE L*a*b*; limestone; masonry; provenance; environmental resource management |
Year | 2015 |
Journal | Journal of Cultural Heritage |
Journal citation | 16 (6), pp. 822-830 |
Publisher | Elsevier |
ISSN | 1296-2074 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.culher.2015.03.007 |
Publication dates | |
17 Apr 2015 | |
Publication process dates | |
Deposited | 30 Oct 2015 |
Accepted | 18 Mar 2015 |
Output status | Published |
File |
https://repository.canterbury.ac.uk/item/87841/sourcing-limestone-masonry-for-restoration-of-historic-buildings-a-spectroscopic-study
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