Characterisation of archaeological mortars from Pompeii (Campania, Italy) and identification of construction phases by compositional data analysis

Miriello, Domenico; Barca, Donatella; Bloise, Andrea; Ciarallo, Annamaria; Crisci, Gino Mirocle; Rose, Teresa De; Gattuso, Caterina; Gazineo, Flavia; Russa, Mauro Francesco La

doi:10.1016/j.jas.2010.03.019

Cited by 149 publications

(95 citation statements)

References 42 publications

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“…These ratios are nearly equivalent to CaCO 3 /SiO 2 ratios that are usually found within the compositions of the binders of the historic mortars [14,19,20]. The samples were prepared by gently mixing the stoichiometric proportions of two components in an agate mortar.…”

Section: Preparation Of Standard Caco 3 and Sio 2 Mixturesmentioning

confidence: 99%

“…First phase of the study was to investigate the microstructural characteristics of the binders by SEM analysis on fractured samples surfaces. For the XRD, FTIR, SEM-EDS and LIBS analyses, mortar matrices which are free from coarse grained aggregates were gently ground into powder form and then sieved to obtain a less than 1/16 mmdiameter fraction [19,20]. XRD, SEM-EDS, FTIR and LIBS analysis were then carried out for the prepared binder samples to find out the weight ratios of CaCO 3 to SiO 2 by using calibration equations obtained from standard mixtures analyses.…”

Section: Preparation Of Roman Mortar Samplesmentioning

confidence: 99%

“…They are produced by heating natural clays between 450 and 800°C [13]. They were mostly used in the mortars of cisterns, aqueducts, bridges and bath buildings [6,19,20,26].…”

Section: Introductionmentioning

confidence: 99%

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Determination of CaCO3 and SiO2 content in the binders of historic lime mortars

et al. 2011

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The binders of historic mortars composed of small grain sized silica (SiO 2 ) and carbonated lime (CaCO 3 ) are considered as the main part that give hydraulic character and high strength to the mortar. In this study, FTIR, SEM-EDS, LIBS and XRD spectroscopy were used to find out the weight ratios of CaCO 3 to SiO 2 in the binders of historic lime mortars. For this purpose, a series of pure calcium carbonate and silica mixture were prepared in ten combinations in varying ratios from 0.5 to 5. Calibration curve was prepared for each analysis by plotting the peak area or intensity ratios of CaCO 3 to SiO 2 versus the weight ratios of CaCO 3 to SiO 2 . A good linear correlation coefficient was obtained for each analysis respectively. The analyses were then tested on the binder of the Roman mortar samples. The results indicated that FTIR, SEM-EDS and LIBS spectroscopy are convenient tools to determine the weight ratios of CaCO 3 to SiO 2 in the binders of mortars. But XRD spectroscopy is not convenient for quantitative analysis of binders due to the presence of varied amounts of amorphous or poor crystalline silica in their compositions.

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Section: Preparation Of Standard Caco 3 and Sio 2 Mixturesmentioning

confidence: 99%

Section: Preparation Of Roman Mortar Samplesmentioning

confidence: 99%

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Determination of CaCO3 and SiO2 content in the binders of historic lime mortars

et al. 2011

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“…The study of the techniques originally used is essential for conservation and restoration, is required in order to understand the original and added materials present both on the surface and within the painting's stratigraphy (7)(8)(9)(10) Los principales problemas que afectan a la casa de Ariadna son la colonización biológica (plantas superiores y animales) y los problemas de lixiviado causados por las lluvias debido a la prolongada ausencia de tejado.…”

Section: Introductionmentioning

confidence: 99%

“…Estos estudios son necesarios para comprender los materiales originales y añadidos, presentes tanto en la superficie como dentro de la estratigrafía de la pintura (7)(8)(9)(10). Además, los resultados analíticos pueden mejorar el conocimiento general del conservador sobre los M. C. Pérez et.…”

Section: Introductionunclassified

Pinturas murales de la casa de Ariadna (Pompeya, Italia): Un estudio multidisciplinar de su estado actual enfocado a una futura restauración y conservación preventiva

Pérez¹,

García-Diego²,

Merello³

et al. 2012

Mater. construcc.

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Compositional Data

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2022

Wiley StatsRef: Statistics Reference Online

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Compositional data are multivariate vectors that describe parts of some whole. Compositional data occur as vectors of proportions, percentages, or parts per million (ppm), although the definition also includes other types of vectors. If the compositional nature of data is ignored, misleading results may be obtained. In this case, the finding of spurious correlations, the appearance of the Simpson's paradox, and the prediction of negative values for proportions are common issues. To overcome these problems, a mathematical structure for compositional data has been defined: the Aitchison geometry on the simplex and the characterization of the simplex as a Euclidean vector space. This structure allows a suitable treatment of compositional data, either in their sample space or through their expression in coordinates, which are real vectors. Coordinates may be derived by appropriate transformations. Additive logratio (alr), centered logratio (clr), or isometric logratio (ilr) transformations may be selected. The most suitable transformation is tailored to the problem at hand and the statistical tools needed for the subsequent treatment. Several computer tools are available to perform the compositional data analysis.

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Characterisation of archaeological mortars from Pompeii (Campania, Italy) and identification of construction phases by compositional data analysis

Cited by 149 publications

References 42 publications

Determination of CaCO3 and SiO2 content in the binders of historic lime mortars

Determination of CaCO3 and SiO2 content in the binders of historic lime mortars

Pinturas murales de la casa de Ariadna (Pompeya, Italia): Un estudio multidisciplinar de su estado actual enfocado a una futura restauración y conservación preventiva

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