Natural Resources

Building Stone Decay: From Diagnosis to Conservation - by R. Prikryl, B. J. Smith

By R. Prikryl, B. J. Smith

Stone constructions and monuments shape the cultural centres of some of the world's city components. often those components are vulnerable to excessive degrees of atmospheric pollutants that advertise a number of competitive stone decay procedures. due to this, stone decay is now widely known as a critical danger to a lot of our cultural background. If this probability is to be effectively addressed it really is crucial that the indications of deterioration are essentially pointed out, that applicable stone houses are competently characterised and that decay tactics are accurately pointed out. it truly is absolutely the case that profitable conservation needs to be underpinned through a finished realizing of the explanations of degradation and the standards that regulate them. The accomplishment of those challenging ambitions calls for an interdisciplinary procedure 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 information base facing the reasons, outcomes, prevention and resolution of stone decay problems.Also on hand: GEOMATERIALS IN CULTURAL history - particular booklet no. 257 - ISBN 1862391955 usual Stone, Weathering Phenomena, Conservation recommendations and Case reviews - ISBN 1862391238 Stone: development Stone, Rock Fill and Armourstone in development - ISBN 1862390290

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

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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. determined by developing a two-dimensional (2D) parametrical analysis with FLAC2D (Evangelista et al. 2000), which is a widely used DEM computer code. The mechanical features were taken into account by varying the stiffness and the strength of the undisturbed rock; the role of pre-existing fractures was also considered, with both a discontinuum and an equivalent continuum approach.

Phlegrean Fields. In: Quaderni de 'La Ricerca Scientifica', CNR, Progetto Finalizzato Geodinamica, 114(9). , SBRANA, A. 8c PRINCIPE, C. 1983. The Phlegrean Fields: structural evolution, volcanic history and eruptive mechanism. Journal of Volcanology and Geothermal Research, 17, 273-288. it) Abstract: The research focuses on the features of 250 natural stone portals of the civil buildings of the town of Udine (NE Italy), dating between the 15th and 20th centuries. In order to clearly define the number, characteristics and uniqueness of these architectural elements, three strategies were implemented: (i) a concise database of all the portals; (ii) a concise reference database of more than 100 portals of five significant nearby towns; and (iii) a detailed inventory, consisting of data and photographs of about 200 portals selected for relevance or because they represent a recurrent type.

The authors wish to thank the reviewers (A. Calia, W. Dubelaar and an anonymous referee) who substantially improved the paper. The authors are also grateful to L. Melluso and V. Morro (CISAG/Dipartimento Scienze della Terra - Universith FEDERICO II) for useful discussions. Work carried out with the financial support of Campania Region Legge no. 5 - Annualith 2002 (P. Cappelletti) and MIUR COFIN 2003 (M. de' 31 Gennaro), and within the scientific activities of the Centro di Competenza 'INNOVA' - Dimostratore Campi Flegrei.

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