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dc.contributor.authorLa Russa, Mauro Francescoes_ES
dc.contributor.authorRuffolo, S. A.es_ES
dc.contributor.authorÁlvarez de Buergo, Mónicaes_ES
dc.contributor.authorRicca, M.es_ES
dc.contributor.authorBelfiore, C. M.es_ES
dc.contributor.authorPezzino, Antoninoes_ES
dc.contributor.authorCrisci, G. M.es_ES
dc.identifier.citationBulletin of Engineering Geology and the Environment 76(1): 115–124 (2017)es_ES
dc.description.abstractSalt crystallization is a strong weathering agent in porous building materials. The crystallization pressure exerted by salt crystals, growing in confined pores, is found to be one of the main causes for damage. This paper presents the results of laboratory experimentation carried out on the Neapolitan Tuff, a pyroclastic rock largely used in Campanian architecture. Several specimens, collected from a historical quarry near the city of Naples, were treated with two different consolidating products: a suspension of nanosilica in water (Syton X30®) and ethyl silicate (Estel 1000®) dispersed in organic solvent (TEOS). Untreated and treated samples were then artificially degraded using salt crystallization tests in order to assess the effectiveness of consolidation treatments. A systematic approach, including mercury intrusion porosimetry, peeling tests and point load test, was employed to evaluate the correlation between the salt crystallization and the micro-structural features of the tuff. In addition, in order to make a correlation between porous structure of materials and susceptivity to salt crystallization, the calculation of the crystallization pressures was performed. In all samples, at the early stage of crystallization, the presence of gypsum was revealed, coming from the precipitation of sulphate ions, introduced during the test, and sodium ions, coming from the zeolites within the stone. Results showed that both consolidants increase the resistance of tuff to salt crystallization, although they induce an increase in crystallization pressure. Ethyl silicate, however, shows a better behaviour in terms of superficial cohesion, even after several degradation cycles.es_ES
dc.description.sponsorshipThis research was funded by POR Calabria FESR project “NANOPROTECH” (NANO PROtection TEchnology for Cultural Heritage).es_ES
dc.subjectNeapolitan Tuffes_ES
dc.subjectSalt weatheringes_ES
dc.subjectStone consolidationes_ES
dc.titleThe behaviour of consolidated Neapolitan yellow Tuff against salt weatheringes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.contributor.funderRegione Calabriaes_ES
dc.contributor.funderEuropean Commissiones_ES
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