La calce: utilizzare un materiale antico a garanzia del futuro


Costanzi Cobau, A.

2013


La calce è stata usata fin dall’antichità per la realizzazione di edifici, soffitti, di rivestimenti parietali, di pavimenti. Il loro stato di conservazione nel tempo offre l’empirica sicurezza che si tratti di un materiale in grado di invecchiare bene. Ciononostante, in una bibliografia della conservazione, la descrizione dell’uso della calce come materiale di restauro compare sempre in parti marginali. In questo articolo si vuole presentare l’utilizzo della calce aerea (grassello) in diverse miscele e soluzioni impiegate nel corso di trenta anni di cantieri di restauro eseguiti con il CCA, Centro di Conservazione Archeologica, in Italia ed all’estero.


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The conservation and restoration of the mosaic floor of the Bizantine Church (Western) in the Nabatean town of Mamshit in the Negev desert


Zizola, C.

1999


During 1994 the CCA, Centro di Conservazione Archeologica, carried out the in situ conservation of the mosaic floors of the Bizantine  Church (Western Church) in the nabatean town of  Mamshit in the Negev Desert. This was a polichrome mosaic of about 80 square meters with geometrical, figurative decorations plus three inscriptions. The two months intervention on site was carried out by a team of 8 conservators and was implemented by using lime based techniques of in situ consolidation. A detailed documentation was carried out to record the consistency of the mosaic, the state of conservation, the treatments carried out.
When the intervention was almost completed the entire church was vandalized one night. The mosaic was heavily damaged and almost all figures and inscriptions destroyed. Local authorities immediately decided to answer with a strong political message and decided for a complete reconstruction of the mosaic. This was possible thanks to the accurate documentation carried out during the conservation intervention. The remaining mosaic was partially lifted, shipped to Rome, restored (or better re-made) and, after two years work, it was brougth back and relayed on site. This paper describes all those phases and concludes presenting the actual programme for future protection and maintenance on the monument.


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Mamshit, Israel, and San Paolino alla Regola, Rome: what cooperation or interference between archaeologist and conservator can achieve


Albini, R., Costanzi Cobau, A. and Zizola, C.

1996


Archaeological sites are important for the messages that they convey from the past. Everything in archaeology must be devoted to the recovery, preservation, presentation and transmission of that message. Optimum results will be obtained when all professionals involved cooperate towards this common objective. This paper presents two cases of on-site conservation; frescoes of the 3rd century AD at Mamshit, Israel, and frescoes and mosaics of the 2nd century AD at San Paolino alla Regola, Rome. The first of these treatments was carried out many years after the excavation and represents an example of "maximum intervention-minimum efficiency". In the second case study, collaboration between conservator and archaeologist from the beginning of the excavation made it possible to follow the principle of "minimum intervention-maximum efficiency". Both the treatments presented used local materials similar to the originals. Preventive measures and maintenance programmes have been set up for future conservation.


Download Zizola Costanzi-Cobau Albini_1996_Rome San Paolino alla Regola and Mamshit Israel.pdf (151.05 KB)