By R. Prikryl, B. J. Smith

Stone structures and monuments shape the cultural centres of some of the world's city components. often those components are at risk of excessive degrees of atmospheric pollutants that advertise numerous competitive stone decay tactics. due to this, stone decay is now well known as a critical hazard to a lot of our cultural historical past. If this danger is to be effectively addressed it really is crucial that the indications of degradation are in actual fact pointed out, that acceptable stone homes are safely characterised and that decay approaches are accurately pointed out. it's surely the case that winning conservation needs to be underpinned by way of a complete realizing of the reasons of degradation and the criteria that regulate them. The accomplishment of those difficult pursuits calls for an interdisciplinary strategy according to co-operation among geologists, environmental scientists, chemists, fabric scientists, civil engineers, restorers and designers. In pursuit of this collaboration, this quantity goals to reinforce the data base facing the reasons, results, prevention and answer of stone decay problems.Also to be had: GEOMATERIALS IN CULTURAL historical past - specific e-book no. 257 - ISBN 1862391955 common Stone, Weathering Phenomena, Conservation ideas and Case stories - ISBN 1862391238 Stone: construction Stone, Rock Fill and Armourstone in building - ISBN 1862390290

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Additional info for Building Stone Decay: From Diagnosis to Conservation - Special Publication no 271 (Geological Society Special Publication)

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5 MPa), depending essentially on the welding degree, the textural features that characterize each layer and the void ratio. The safety factors (SF) were evaluated for critical sections of the cavity using analytical methods. The static conditions of pillars and roofs were separately Fig. 11. Results of the stress simulation carried out on pillars. 30 D. CALCATERRA ET AL. 5m It=2m 24i IIt=3m nt=4m 2s 30~ 33 0 ~ 20 15 6 5 0 SF2 (high) SF Fig. 12. (a) Description of the 'arch mechanism' (see text for details); and (b) results of the simulations.

Petrophysical property studies of the stone are presented in Carulli & Onofri (1966), with reference to the Clauzetto Stone. The Travesio Stone is often confused with the similar Aurisina limestone, even if archive documents (Bergamini & Goi 1982; Goi 1998) clearly state its provenance. In Udine it was probably used only for a few portals of the early 16th century. The use of Aurisina Stone (Carulli & Onofri 1969) is, on the other hand, documented in the mid 17th century for the enlargement of the Town Hall building (Joppi & Occioni-Bonaffons 1877; Spadea et al.

Piperno represents the most widely used stone in the historical architecture of Naples, Campania region, Italy. In addition, its use was also recorded in many minor centres (Calcaterra et al. 2003) and even outside the region, including historical buildings in the town of Gallipoli, Puglia Region (Calcaterra pers. ). Notwithstanding the limited extent of Piperuo's occurrence and its difficulty of exploitation (mainly extracted from underground), it has been used since Greek-Roman times and intensively from the 18th century until after World War II, mainly in Naples and its province.

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