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New insights on the consolidation of salt weathered limestone: the case study of Modica stone

  • Silvestro A. RuffoloEmail author
  • Mauro F. La Russa
  • Michela Ricca
  • Cristina M. Belfiore
  • Andrea Macchia
  • Valeria Comite
  • Antonino Pezzino
  • Gino M. Crisci
Original Paper

Abstract

The deterioration of a stone material is related to its pore structure, which affects the interaction between surface and environmental agents. Indeed, salt crystallization is one of the most dangerous weathering agents in porous building materials. The crystallization pressure of salt crystals, growing in confined pores, is found to be the main cause for damage. The consolidation of such degraded stone materials represents a crucial issue in the field of restoration of cultural heritage. This paper presents the results of a laboratory experimentation carried out on Modica stone, a limestone largely used in the Baroque architecture of eastern Sicily. Several specimens, collected from a historical quarry near the city of Modica, were artificially degraded by salt crystallization tests. Then, degraded samples were treated with three different consolidating products: a suspension of nanolime in alcohol, a suspension of nanosilica in water, and ethyl silicate dispersed in white spirit. A systematic approach, including mercury intrusion porosimetry, peeling tests and point load test, was used to evaluate the correlation between the salt crystallization and the micro-structural features of the limestone, as well as the efficacy of treatments. The consolidating behavior of the tested products was also appraised by repeating salt crystallization tests after consolidation, in order to assess the resistance of treated stone to further salt crystallization phenomena. Results showed that nanolime provides a good resistance to the stone; conversely, ethyl silicate, although inducing an enhancement of stone cohesion, leads to an increase of the crystallization pressure, which generates dangerous susceptibility to weathering.

Keywords

Modica stone Salt weathering Stone consolidation Nanolime Nanosilica 

Notes

Acknowledgments

This research was supported by the Italian national project “Polo di Innovazione dei Beni Culturali”.

References

  1. Angeli M, Benavente D, Bigas JP, Menendez B, Hebert R, David C (2008) Modification of the porous network by salt crystallisation in experimentally weathered sedimentary stones. Mater Struct 4:1091–1108CrossRefGoogle Scholar
  2. Arnold A, Zehnder K (1989) The conservation of monuments in the Mediterranean basin, Grafo Edizioni, Brescia, pp 31–58Google Scholar
  3. ASTM D 5731 (2002) Standard test method for determination of the point load strength index of rockGoogle Scholar
  4. Belfiore CM, La Russa MF, Pezzino A, Campani E, Casoli A (2010) The Baroque monuments of Modica (Eastern Sicily): assessment of causes of chromatic alteration of stone building materials. Appl Phys A 100:835–844CrossRefGoogle Scholar
  5. Benavente D, García del Cura MA, Bernabéu A, Ordóńez S (2001) Quantification of salt weathering in porous stones using an experimental continuos partial immersion method. Eng Geol 59:313–325CrossRefGoogle Scholar
  6. Benavente D, GarcÌa del Cura MA, Fort R, Ordóñez S (2004) Durability estimation of porous building stones from pore structure and strength. Eng Geol 74:113–127CrossRefGoogle Scholar
  7. Cassar J (2010) The use of limestone in a historic context—the experience of Malta. In: Smith BJ, Gomez-Heras M, Viles HA, Cassar J (eds) Limestone in the built environment: present-day challenges for the preservation of the past, vol 331. Geological Society of London, London, pp 13–25Google Scholar
  8. Chelazzi D, Poggi G, Jaidar Y, Toccafondi N, Giorgi R, Baglioni P (2013) Hydroxide nanoparticles for cultural heritage: consolidation and protection of wall paintings and carbonate materials. J Colloid Interface Sci 392:42–49CrossRefGoogle Scholar
  9. Dei L, Salvadori B (2006) Nanotechnology in cultural heritage conservation: nanometric slaked lime saves architectonic and artistic surfaces from decay. J Cult Herit 7:110–115CrossRefGoogle Scholar
  10. Doehne E, Price CA (2010) The stone conservation: an overview of current research, 2nd edn. Getty Conservation Institute, Los Angeles, p 164Google Scholar
  11. Drdàcky M, Lesàk J, Rescic S, Slìzkovà Z, Tiano P, Valach J (2012) Standardization of peeling test for assessing the cohesion and consolidation characteristics of historic stone surfaces. Mater Struct 45:505–520CrossRefGoogle Scholar
  12. Dunham RJ (1962) Classification of carbonate rocks according to depositional texture. In: Ham WD (ed) American Association of Petroleum Geologist Memoir, pp 108–121Google Scholar
  13. EN 12370 (2001) Natural stone test methods—determination of resistance to salt crystallization. European Committee for Standardization (CEN), Brussels, pp 108–121Google Scholar
  14. Espinosa-Marzal RM, Scherer GW (2010) Mechanisms of damage by salt. In: Smith BJ, Gomez-Heras M, Viles HA, Cassar J (eds) Limestone in the built environment: present-day challenges for the preservation of the past, vol 331. Geological Society of London, London, pp 61–77Google Scholar
  15. Everett DH (1961) The thermodynamics of frost damages to porous solids. T Faraday Soc 57:1541–1551CrossRefGoogle Scholar
  16. Fitzner B, Snethlage R (1982) Ueber Zusammenhange zwischen Salzkristallisationsdruck und Porenradienverteilung. GP Newsl 3:13–24Google Scholar
  17. Flatt RJ (2002) Salt damage in porous materials: how high supersaturations are generated. J Cryst Growth 242:435–454CrossRefGoogle Scholar
  18. Goudie AS, Viles HA (1997) Salt weathering hazards. Wiley, ChichesterGoogle Scholar
  19. Kim EK, Won J, Do J, Kim SD, Kang YS (2009) Effects of silica nanoparticle and GPTMS addition on TEOS-based stone consolidants. J Cult Herit 10:214–221CrossRefGoogle Scholar
  20. Koniorczyk M, Gawin D (2012) Modelling of salt crystallization in building materials with microstructure-poromechanical approach. Constr Build Mater 36:860–873CrossRefGoogle Scholar
  21. La Russa MF, Barone G, Mazzoleni P, Pezzino A, Crupi V, Majolino D (2008) Characterisation and differentiation of pigments employed on the facade of “Noto’s Valley” monuments (Sicily). Appl Phys A 92:185–190CrossRefGoogle Scholar
  22. La Russa MF, Barone G, Belfiore C, Mazzoleni P, Pezzino A (2011) Application of protective products to “Noto” calcarenite (South-eastern Sicily): a case study for the conservation of stone materials”. Environ Earth Sci 62:1263–1272CrossRefGoogle Scholar
  23. La Russa MF, Ruffolo SA, Rovella N, Belfiore CM, Palermo AM, Guzzi MT, Crisci GM (2012) Multifunctional TiO2 coatings for cultural heritage. Prog Org Coat 74:186–191CrossRefGoogle Scholar
  24. La Russa MF, Ruffolo SA, Belfiore CM, Aloise P, Randazzo L, Rovella N, Pezzino A, Montana G (2013) Study of the effects of salt crystallization on degradation of limestone rocks. Period Mineral 82:113–127Google Scholar
  25. La Russa MF, Macchia A, Ruffolo SA, De Leo F, Barberio M, Barone P, Crisci GM, Urzì C (2014) Testing the antibacterial activity of doped TiO2 for preventing biodeterioration of cultural heritage building materials. Int Biodeter Biodegr 96:87–96CrossRefGoogle Scholar
  26. La Russa MF, Belfiore CM, Fichera GV, Maniscalco R, Calabrò C, Ruffolo SA, Pezzino A (2015) The behaviour to weathering of the Hyblean limestone in the baroque architecture of the Val di Noto (SE Sicily): an experimental study on the “calcare a lumachella” stone. Constr Build Mater 77:7–19CrossRefGoogle Scholar
  27. Lazzarini L, Laurenzi Tabasso M (1986) II Restauro della Pietra. Antonio Milani, PadovaGoogle Scholar
  28. McCabe S, Smith BJ, Warke PA (2007) Preliminary observations on the impact of complex stress histories on sandstone response to salt weathering: laboratory simulations of process combinations. Environ Geol 52:251–258CrossRefGoogle Scholar
  29. Mosquera MJ, Pozo J, Silva B, Rivas T, Esquivias E (2002) Application of mercury porosimetry to the study of xerogels used as stone consolidants. J Noncryst Solid 311:185–194CrossRefGoogle Scholar
  30. Mosquera MJ, Pozo J, Esquivias E (2003) Stress during drying of two stone consolidants applied in monumental conservation. J Sol-Gel Sci Tech 26:227–1231CrossRefGoogle Scholar
  31. Pinto F, Rodrigues D (2008) The action of inorganic consolidants in limestones. In: Lukaszewicz JW, Niemcewicz P (eds) Proceedings of the 11th international congress on deterioration and conservation of stone, Poland, pp 80–873Google Scholar
  32. Price CA (1975) Stone decay and preservation. Chem Br 11:350–353Google Scholar
  33. Price C (2006) Consolidation. In: Henry A (ed) Stone conservation: principles and practice. Donhead Publishing, Shaftesbury, pp 101–126Google Scholar
  34. Price C (2007) Predicting environmental conditions to minimise salt damage at the Tower of London: a comparison of two approaches. Environ Geol 52:369–374CrossRefGoogle Scholar
  35. Rossi-Manaresi R, Tucci A (1991) Pore structure and the disruptive or cementing effect of salt crystallization in various types of stone. Stud Conserv 36:53–58Google Scholar
  36. Ruffolo SA, La Russa MF, Malagodi M, Oliviero Rossi C, Palermo AM, Crisci GM (2010) ZnO and ZnTiO3 nanopowders for antimicrobial stone coating. Appl Phys A 100:829–834CrossRefGoogle Scholar
  37. Ruffolo SA, La Russa MF, Aloise P, Belfiore CM, Macchia A, Pezzino A, Crisci GM (2013) Efficacy of nanolime in restoration procedures of salt weathered limestone rock. Appl Phys A 114:753–758CrossRefGoogle Scholar
  38. Schaffer RJ (1932) The weathering of natural building stones. Department of Scientific and Industrial Research, Build Res Board, Special Report 18:42–48Google Scholar
  39. Scherer GW (1999) Crystallisation in pores. Cem Concr Res 29:1347–1358CrossRefGoogle Scholar
  40. Scherer GW (2004) Stress from crystallization of salt. Cem Concr Res 34:1613–1624CrossRefGoogle Scholar
  41. Scherer GW, Wheeler GE (1997) Stress development drying of conservare OHR. In: Moropoulou A, Zezza F, Kollias E, Papachristodoulou I (eds) 4th international symposium on the conservation of monuments in the mediterranean, Rhodes, pp 355–362Google Scholar
  42. Smith BJ, Gomez-Heras M, Viles HA (2010) Underlying issues on the selection, use and conservation of building limestone. In: Smith BJ, Gomez-Heras M, Viles HA, Cassar J (eds) Limestone in the built environment: present-day challenges for the preservation of the past, vol 331. Geological Society, London, pp 1–11 (Special Publications) Google Scholar
  43. Wellman HW, Wilson AT (1965) Salt weathering, a neglected geological erosive agent in coastal and arid environments. Nature 205:1097–1098CrossRefGoogle Scholar
  44. Wellman HW, Wilson AT (1968) Salt weathering or fretting. In: Fairbridge RW (ed) Encyclopedia of geomorphology, Dowden, Hutchinson & Ross, Stroudsburg, pp 968CrossRefGoogle Scholar
  45. Wheeler GE, Fleming SA, Ebersole S (1992) Comparative strengthening effects of several consolidants on Wallace sandstone and Indian limestone. In: Delgado J, Henriques F, Jeremias F (eds) Proceedings of the 7th international congress on deterioration and conservation of stone, Lisbon, pp 1033–1041Google Scholar
  46. Winkler EM (1997) Stone in architecture, properties, durability. Springer, Berlin, p 315CrossRefGoogle Scholar
  47. Yu S, Oguchi CT (2010) Role of pore size distribution in salt uptake, damage, and predicting salt susceptibility of eight types of Japanese building stones. Eng Geol 115:226–236CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Silvestro A. Ruffolo
    • 1
    Email author
  • Mauro F. La Russa
    • 1
  • Michela Ricca
    • 1
  • Cristina M. Belfiore
    • 2
  • Andrea Macchia
    • 3
  • Valeria Comite
    • 1
  • Antonino Pezzino
    • 2
  • Gino M. Crisci
    • 1
  1. 1.Dipartimento di Biologia, Ecologia e Scienze della Terra (DiBEST)Università della CalabriaCosenzaItaly
  2. 2.Dipartimento di Scienze Biologiche, Geologiche e Ambientali, Sezione di Scienze della TerraUniversità di CataniaCataniaItaly
  3. 3.YOuth in COnservation of CUltural Heritage, YOCOCURomeItaly

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