Search results for "stone material"
showing 10 items of 10 documents
Unknown Deformations on the Facades of the Pyramid of Khafre at Giza Pyramid Complex in Egypt
2016
Abstract The pyramids of Giza in Egypt are the architectural heritage of ancient civilizations and for many thousand years served as great examples of ancient design, planning and construction solutions. Their scale is grandiose and the attempts of ancient architects to find perfect forms to ensure the structure stands for eternity are admirable. The initial geometry of the structures, their form, proportions and symmetry, was adapted to construction material and technologies available at that time. However, during more than 4500 years these monuments were damaged and partly destroyed; some pyramids were razed to the ground due to construction faults and seismic activity. The second largest…
Degradation of stone materials in the archaeological context of the Greek-Roman Theatre in Taormina (Sicily, Italy)
2010
In the present work results on the degradation phenomena of stone materials in the Ancient Theatre of Taormina, one of the most important Greek–Roman monuments of Sicily, are reported. Artificial stone materials in different conservation conditions were investigated. Samples of salt efflorescences from brick walls and degraded setting mortars were taken from the open gallery in “summa cavea”. The chemical, physical and structural characterization was performed by means of X-Ray Photoelectron Spectroscopy (XPS), X-Ray Diffraction (XRD) and X-Ray Fluorescence (XRF), both in situ and ex situ. Results showed that the deterioration of stone materials is due to the aggressive action of the enviro…
Architetture di pietra e mestieri da perpetuare
2018
It is a short text written at the request of the Pro-loco of Sinagra , a small town in the province of Messina, dedicated to the traditional processing of the local stone.
Degradation study of XVIII century graffiti on the walls of Chiaramonte Palace (Palermo, Italy)
2010
A systematic investigation of the original materials and the degradation phenomena induced by soluble salts on the wall matrix and on the graffiti of the Inquisition jails of Chiaramonte Palace in Palermo (Italy) was carried out. Built in the XIV century, Chiaramonte Palace was used as Inquisition court during the XV–XVI centuries. The ancient graffiti, recently discovered, represent a unique historical witness of the prisoners that lived during that terrible period. In order to study the nature, the amount and the distribution of the salts in the masonry, stone materials sampled at different depth from the wall matrix and saline efflorescences were analysed. Different physical techniques w…
Building materials and decay assessment of the Gerace Cathedral (Reggio Calabria, Southern Italy)
2023
A multi-analytical approach was employed for the first time to study the stone materials, wall paintings and related degradation forms in the Cathedral of Gerace (Reggio Calabria, southern Italy). With an area of around 1898 square meters, the Gerace Cathedral is the largest in Calabria: its construction dates back to the Norman era (between 1085 and 1120), and currently displays distinct features of Greek and Latin architectural orders. Despite having undergone numerous restorations, the church perfectly preserves its original buildings materials. Following an extensive site inspection campaign, supported by the experts dealing with building restoration, several areas were selected for ana…
Nanostructured protective for historical-artistic stone materials: evaluation of effectiveness and persistence by non invasive techniques
2014
Contributi alla interpretazione, conservazione e restauro dei manufatti storico-artistici dell’Orto Botanico di Palermo: il Paride di Nunzio Morello
2017
Contributions to the interpretation, conservation and restoration of the historical and artistic artifacts of the Botanical Garden of Palermo: the Paride by Nunzio Morello – Purely cognitive and conservative requirements of the historical-artistic heritage of the Botanical Garden of the University of Palermo, have led the authors to present one of the most representative monuments of such Garden that is of great artistic and cultural value in the City of Palermo: the Paride Pensante, a marble sculpture made in 1839 by the Palermo sculptor Nunzio Morello - a pupil of the most famous artist Valerio Villareale - donated to his homeland and placed in the men- tioned Botanical Garden, in the squ…
Assesment of the Conservation State of Stone Materials in Relation to the Level Environmental Pollution in the Conservation Place
2007
The patina represents a superficial natural alteration of the constituting matter of the work of art. It emerges from the natural and usual stabilization process that the materials of the surface undergo because of the interaction with outdoor agents characterizing the surrounding environment. Besides, it is not linked to an obvious phenomenon of degradation that can be noticed through the change in the original colour of the matter. This is what we intend when we talk about biological patina usually generated by macro and/or micro-organic colonization (fungi, bacteria, alga) which contributes to surface bio-deterioration and thus lead to the formation of orange, red or even brown and dark …
STUDIO MINERALOGICO-PETROGRAFICO E PROBLEMI CONSERVATIVI
2011
Il capitolo illustra le risultanze dello studio delle problematiche conservative e della caratterizzazione mineralogico petrografica dei materiali lapidei del teatro ellenistico di Morgantina (Enna). Tale attività è stata finalizzata alla definizione dell'intervento conservativo del teatro. The chapter illustrates the results of the study of conservation issues and petrographic mineralogical characterization of the stone materials of the Hellenistic theater of Morgantina (Enna). This activity was aimed at defining the conservative intervention of the theatre.
Palermo 2018 i portali. Architetture e culture della tradizione costruttiva siciliana
2018
Il viaggio tra i portali monumentali è una rivisitazione inedita della città. Fare un giro nel centro storico di Palermo è un vero e proprio viaggio nella storia che solo un occhio attento e preparato comprende. I segni della sua ori- gine sono ancora leggibili, così come le sue trasformazioni sono impresse, nelle strade e nelle facciate di palazzi e chiese. Il fascino di questa città sta forse proprio in queste modificazioni e sovrapposizioni, in questa ricerca del documento che è storia e tecnologia insieme perché la storia si è impressa nella materia che la sostanzia. Lo studio dei portali di Palermo è frutto di una ricerca internazionale che ha per tema la lettura del costruito storico …