Search results for "marble"
showing 10 items of 54 documents
Lithium silicate admixture in mortars to be used as putty for limestone
2018
Marble is a very common material in artworks for its softness, relative isotropy and homogeneity and its characteristic waxy look that gives "life" to sculptures. Even if in geology the term "marble" refers to metamorphosed limestone, commonly the term ‘marble’ is used more broadly encompassing hard unmetamorphosed limestone that can be polished assuming a glossy aspect. In the restoration field when marble artworks have cracks that alter the smoothness of their surface, a putty is used to fill them, for both aesthetic and conservative reasons. Putties usually consist of epoxy resin mixed with marble powder. The use of a synthetic resin raises some doubts on compatibility and durability of …
Pompei, Casa di Sallustio (Regio VI 2, 4): 2. Statuetta di Eracle con la cerva cerinite; 3. Vasca marmorea; 4. Monopodio con erma barbata; 5. Tavola;…
2019
Si presentano i rinvenimenti più significativi dagli scavi di S.M. la Regina Carolina di Borbone nella domus pompeiana poi divenuta nota come Casa di Sallustio: arredi marmorei e scultorei (sia in marmo che in bronzo) che consentono di ricostruire, in particolare, l'allestimento ricercato dell'atrio nella risistemazione augustea della domus
"Terrenis caelestia iunguntur". Il candelabro pasquale della Cappella Palatina di Palermo: un Exultet di pietra
2015
Lo studio propone una nuova lettura iconografica dell'opera, dovuta tradizionalmente allo scultore noto come Maestro dei putti del chiostro di Monreale, in rapporto ai coevi rotoli liturgici miniati di Exultet, specie di ambito beneventano-cassinese, in uso in Italia centro-meridionale, nonché nuove proposte sulla sua datazione (1166-1172) e sulla committenza, individuabile in Romualdo Guarna arcivescovo di Salerno. The study proposes a new iconographic reading of the work, traditionally due to the sculptor known as the Master of the putti of the cloister of Monreale, in relation to the contemporary illuminated liturgical scrolls of Exultet, a species of the Benevento-Cassinese context, in …
La mancata agglomerazione del settore lapideo di Custonaci, inizio della crisi 2007-2017
2017
This paper analyzes the stone sector in Sicily in the period 2007-2009, with particular reference to the system of Custonaci, one of the representative sites of the Sicilian marble. The sector has gone through a deep crisis aggravated by structural elements such as the lack of coordination between operators. The research carries out an analysis on the main structural, economic and financial characteristics of a representative sample of 25 companies in the area in order to verify the existence of a consolidated network of enterprises and the applicability, to this reality, of A district theoretical model. This paper indicates the need for the creation of a network system between companies an…
Dynamic behaviour of cracked granite and marble columns retrofitted with steel collars
2014
Marble and heavy stone columns are widely diffused in ancient churches and historical buildings in all the Mediterranean area. Their good mechanical properties allowed carrying great load values, while their bright colours and aesthetical characteristics have been used by a lot of ancient architects to achieve structural solutions with great visual impact. Despite their good compressive strength, marble columns could be damaged from environmental effects (e.g. longterm effects or thermal loads), which could crack the structural members. In this way, the slenderness of the column increases drastically and the presence of an imposed ground shaking could be critical, since the column will be m…
Is the Eco-label EU Decision for hard coverings really capable of capturing the environmental performances of the marble productive chain? A field ve…
2014
Purpose This work intends to show whether the Eco-label EU Decision for hard coverings, in which marble is contemplated among hard coverings as a natural product, is really capable of capturing the environmental performances of the marble productive chain, in other words whether it is actually viable for the natural products, like marble. Methods After a preliminary critical analysis of the suitability formarble of the current EU Decision (2009/607/EC), a classical life cycle assessment (LCA) methodology has been applied on the field to the marble “Perlato di Sicilia.” More specifically, the whole productive chain of a couple of firms treating the “Perlato di Sicilia” marble has been examin…
Surface and volume non-invasive methods for the structural monitoring of the bass-relief ‘Madonna con Bambino’ (Gorizia, Northern Italy)
2016
Structural analysis of marble statues, carried out by non-invasive and in situ methods, is crucial to define the state of conservation of the artworks and to identify the deterioration phenomena that can affect them. In this work, we combined in situ non-destructive techniques, ultrasonic tomography (US), ultraviolet-induced visible fluorescence (UV-IF) and X-ray fluorescence (XRF) to study the bass-relief ‘Madonna con Bambino’ (Gorizia, Italy). The US revealed the presence of some metallic pivots, associated with areas of high sound velocity; moreover, a more degraded area has been identified in the lower part of the bass-relief. The acquired UV-IF image confirmed the presence of surface d…
FORMULATION OF LIME MORTARS BASED ON NATURAL FIBERS AND WASTE MATERIALS FOR MORE SUSTAINABLE BUILDINGS
2019
Nowadays sustainability is one of the main concept in building construction, both considering energy saving buildings and life cycle assessment of building materials. According to these considerations, in this work the use of recycled and waste materials to produce a binder and the use of a natural fiber as reinforcement are investigated to obtain a sustainable mortar. Particularly, lime is obtained by kilning waste marble slurry from marbles quarries in western Sicily; pozzolanic aggregate is obtained by grinding glass powder from urban waste collection; natural fibers come from a widespread grass: Ampelodesmos Mauritanicus also known as diss. Scanning electron microscopy and helium picnom…
L'intonaco Li Vigni nell'architettura del XX secolo a Palermo. Nuove conoscenze e applicazioni diagnostiche per la manutenzione
2013
Il saggio presenta lo studio degli intonaci formulati per imitare le pietre e i marmi naturali che si diffondono in Sicilia all’inizio del XX secolo ed evidenzia che le prime applicazioni e la diffusione delle nuove malte, anche nel resto dell’Italia, risentono delle sperimentazioni condotte in tutta l’Europa. Il contributo riassume i risultati di una rigorosa e capillare ricognizione tra i brevetti conservati presso l’Archivio Centrale dello Stato a Roma inerenti alle malte per il confezionamento dell’intonaco a “finta pietra”, ne analizza i contenuti in modo critico e pone in risalto i contatti culturali con le sperimentazioni dei materiali in atto nell’ambito dei grandi cantieri di resta…
A multi-analytical approach for the characterization of black crusts on the facade of an historical cathedral
2020
Abstract This study focuses on the characterization of black crusts collected from the Monza cathedral located in the homonymous city (N Italy), a hot spot from the point of view of the atmospheric pollution. Black crusts and substrate marble specimens were analyzed by a multi-analytical approach including X-ray Diffraction (XRD), Fourier Transform-Infrared spectroscopy (FT-IR), Stereomicroscopy (SM), Polarized Light Microscopy (PLM), High Resolution Scanning Electron Microscopy coupled with Energy Dispersive X-ray spectroscopy (HRSEM-EDX) and Laser Ablation Inductively Coupled Plasma Mass Spectrometry (LA-ICP/MS). The characterization of the carbon fraction (organic carbon, OC, and element…