Conference Presentations by Claudio Mazzoli
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Papers by Claudio Mazzoli
This contribution is part of a research project aimed at developing a methodology for the emergen... more This contribution is part of a research project aimed at developing a methodology for the emergency stabilization of historic buildings damaged by the 2009 Abruzzo earthquake through compatible injection grouts. Several portions of multi-leaf stone masonry walls from buildings in the towns of Onna, Tempera and Sant’Eusanio Forconese, all located near L’Aquila, were selected for experimental injection tests, planned and verified by means of multiscale characterization studies. The procedure and results of the preliminary studies on the historic mortars and the grouts are here reported. The materials were characterized from the petrographic, textural, mineralogical and chemical point of view through a multianalytical approach including petrographic examinations, particle size distribution studies, XRPD analyses, bulk chemical analyses by XRF and microchemical and microstructural studies by SEM-EDS. The original mortars were subdivided in different groups and a thorough knowledge of th...
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Construction and Building Materials, 2020
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Construction and Building Materials, 2016
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Arqueología de la construcción IV: las canteras en el mundo antiguo : sistemas de explotación y procesos productivos : Actas del congreso de Pavoda, 22-24 de noviembre de 2012, 2014, ISBN 978-84-00-09832-2, págs. 149-166, Sep 1, 2014
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Even though the study of the pre- and protohistoric italian ceramic technology by archaeometric a... more Even though the study of the pre- and protohistoric italian ceramic technology by archaeometric analysis had in the past few interest, by the time it has revealed its potential in the identification of the main technological features and in the reconstruction of exchange or trade system of the ancient communities. At the present time in the Veneto region, this approach of study regards few archaeological contexts and sometimes with small ceramic samplings. The analysis concerned both single site and some micro-regional areas (i.e. the Adige and Po plain or Garda Lake). The chronological framework of the analysed pottery (mainly using OM, XRD and XRF), published up-to-date, cover a period comprised between Early Bronze and 2nd Iron Age and regards mostly settlements (the ceramic samples from cemeteries are very few) placed on different and various geological and geomorphological conformations. The present work is intended to offer a view of the available archaeometry data in Veneto, to discriminate potential technological characteristics, to identify possible ceramic exchange and to distinguish synchronically and diachronically the modus operandi of the ancient potters in a heterogeneous geo-lithological territory. One excellent instrument of combining these different kinds of data (archaeological and archaeometric) is through the use of an “open source” Geographci Information System (GIS), whose application is here submitted.
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In Cultural Heritage studies the documentation and 3D graphical representation of the artefacts i... more In Cultural Heritage studies the documentation and 3D graphical representation of the artefacts is an important issue both for operative and archiving reasons. Instruments such as Laser Targeting Systems (LTS) have been continuously improved, reaching unprecedented resolution down to 1 mm, becoming standard tools for fast 3D acquisitions of vast volumes or objects with complex shapes that couldn’t otherwise be measured. Nonetheless, LTS sensitivity can be not sufficient for the study of material decay throughout time and the description of the surface morphology. In order to fill this gap, in our research we tested Structure from Motion µ-photogrammetry, a completely non-invasive technique deepening the concept of photogrammetry [1]. The method has been applied on cemetery headstones (CWGC Cemetery, Padua, Italy) made of a compact white limestone (Botticino Stone, Italy). The chosen headstones were characterized by medium decay and were not surrounded by vegetation which would have impeded a rigorous multi-view image acquisition. An APS-C Reflex camera (Nikon D-300, equipped with a 24-85mm F/2.4-4 lens) set at 50 mm focal length was used and a special holding rack has been designed in order to minimize focusing error: for a slate of about 76x38x7.6 cm, about 600 shots have been taken. SfM images were then elaborated with Photoscan software to obtain 3D models with resolution of about 25 μm (Figure 1), allowing measurement of volume loss caused by surface recession and the identification of small-scale heterogeneities which are more prone to recession. We have thus shown that this innovative technique is an ideal tool in the study of decay of carbonate rocks and in the determination of surface recession rates.
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ArchéoSciences, 2019
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Archaeometry, 2016
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Journal of Archaeological Science: Reports, 2017
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This paper presents the petrographic and textural characterization of some ornamental limestones ... more This paper presents the petrographic and textural characterization of some ornamental limestones widely used in UNESCO World Heritage sites in northeastern Italy, and the assessment of the main decay factors present in the environment where they are employed. Eleven carbonate building materials have been here considered, all commonly present in the built environment of northeastern Italy: two different varieties of Vicenza Stone (Nanto and Costozza), of Verona Stone (Red and Brown Verona), of Asiago Stone (Pink and White Asiago), and of Chiampo Stone (Ondagata and Paglierino), the Istria Stone (Orsera), the Aurisina Stone, and the Botticino Stone. The Carrara marble is also considered, and used as a reference material for the determination of the grain-size distribution. Stone durability was measured by accelerated ageing tests which reproduced freeze-thaw and salt crystallization cycles, among the main causes of deterioration in the region. Petrographic and textural features of the...
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Minerals
Marine biogenic skeletal production is the prevalent source of Ca-carbonate in today’s Antarctic ... more Marine biogenic skeletal production is the prevalent source of Ca-carbonate in today’s Antarctic seas. Most information, however, derives from the post-mortem legacy of calcifying organisms. Prior imagery and evaluation of Antarctic habitats hosting calcifying benthic organisms are poorly present in the literature, therefore, a Remotely Operated Vehicle survey was carried out in the Ross Sea region Marine Protected Area during the 2013–2014 austral summer. Two video surveys of the seafloor were conducted along transects between 30 and 120 m (Adelie Cove) and 230 and 260 m (Terra Nova Bay “Canyon”), respectively. We quantified the relative abundance of calcifiers vs. non-calcifiers in the macro- and mega-epibenthos. Furthermore, we considered the typology of the carbonate polymorphs represented by the skeletonized organisms. The combined evidence from the two sites reveals the widespread existence of carbonate-mixed factories in the area, with an overwhelming abundance of both low-Mg...
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<p>... more <p>Current global climate changes represent a threat for the stability of the polar regions and may result in cascading broad impacts. Studies conducted on permafrost in the Arctic regions indicate that these areas may store almost twice the carbon currently present in the atmosphere. Therefore, permafrost thawing may potentially cause a significant increase of greenhouse gases concentrations in the atmosphere, exponentially rising the global warming effect. Although several studies have been carried out in the Arctic regions, there is a paucity of data available from the Southern Hemisphere. The Seneca project aims to fill this gap and to provide a first degree of evaluations of gas concentrations and emissions from permafrost and/or thawed shallow strata of the Dry Valleys in Antarctica. The Taylor and Wright Dry Valleys represent one of the few Antarctic areas that are not covered by ice and therefore represent an ideal target for permafrost investigations.</p><p>Here we present the preliminary results of a multidisciplinary field expedition conducted during the Antarctic summer in the Dry Valleys, aimed to collect and analyse soil gas and water samples, to measure CO<sub>2</sub> and CH<sub>4</sub> flux exhalation, to investigate the petrological soil properties, and to acquire geoelectrical profiles. The obtained data are used to 1) derive a first total emission estimate for methane and carbon dioxide in this part of the Southern Polar Hemisphere, 2) locate the potential presence of geological discontinuities that can act as preferential gas pathways for fluids release, and 3) investigate the mechanisms of gas migration through the shallow sediments. These results represent a benchmark for measurements in these climate sensitive regions where little or no data are today available.</p>
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Environmental Earth Sciences
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Conference Presentations by Claudio Mazzoli
Papers by Claudio Mazzoli