The Oslo Opera House – Condition Analysis and Proposal for Cleaning, Protection and Maintenance of Exterior Marble

  • Pagona-Noni MaravelakiEmail author
  • Lucia Toniolo
  • Francesca Gherardi
  • Chrysi Kapridaki
  • Ioannis Arabatzis
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 962)


The photo-oxidative degradation of the polymers applied in the past onto the marble slabs of the Oslo Opera House (OOH) led to the yellowing of the coatings and/or to the formation of insoluble fractions of polymer. Despite the high reduction of the b* parameter (yellowness) observed after the mechanical abrasion, this cleaning treatment cannot be recommended for further application, due to the unacceptable removal of structural material during the abrasion. Cleaning of historic masonry has progressed significantly in recent years, thanks to methods that rely on nanoscience. Therefore, in this research project instead of using organic solvents exhibiting toxicity and poor performance, advanced nanostructured fluids, such as micelles solutions (MC) and microemulsions (ME), embedded in nanogels with industrial solvents were tested aiming at the efficient removal of the hydrophobic coatings from Carrara marble slabs. These nanogels are amphiphilic-based formulations using a system of water, oil and surfactant. However, lack of reproducibility characterized the application of these advanced nanogels, due to partly removal of the unevenly distributed polymer products. Therefore a three-step cleaning methodology was adopted including: the introduction of a chelating agent capable of dissolving the hard film created by the applied coatings, thus allowing any subsequent MC and ME solutions applied in the second step, to swell the polymeric chains and to facilitate their removal, which was further completed by suitable oxidants. Optical and scanning electron microscopy coupled with EDX, along with colorimetric measurements proved that the three-step cleaning tests applied to yellowed samples can successfully remove the colour discoloration.


Oslo Opera House Yellowing identification Cleaning with nanogels 



This research was carried out in the framework of the competitive Project “The Oslo Opera House – Condition analysis and proposal for cleaning, protection and maintenance of exterior marble” funded by Statsbygg, Oslo (Norway). The Authors gratefully thank Dr. Adriana Eidsvik and all the Statsbygg staff for the constant support and advice during the implementation of the Project.


  1. 1.
  2. 2.
    Nilsen, B.: Maintenance operations management (MOM) information for the project: the oslo opera house – condition analysis and proposal for cleaning, protection and maintenance of exterior marble. s.l.: Betong Consult as, 04.11.15. doc 201501489 Operaen i Oslo - Utendørs marmor, rev. 02Google Scholar
  3. 3.
    1: Standard Protocol EN 16096:2012, Conservation of cultural property - Condition survey and report of built cultural heritageGoogle Scholar
  4. 4.
    ICOMOS-ISCS: Illustrated glossary on stone deterioration patterns, ICOMOS. International Scientific Committee for Stone, Paris (2008)Google Scholar
  5. 5.
    Gherardi, F., Kapridaki, C., Roveri, M., Gulotta, D., Maravelaki, P.N., Toniolo, L.: The deterioration of Apuan white marble in contemporary architectural context. J. Cult. Herit. (2018, in press)Google Scholar
  6. 6.
    Oh, S.Y., Yoo, D.I., Shin, Y., Seo, G.: FTIR analysis of cellulose treated with sodium hydroxide and carbon dioxide. Carbohydr. Res. 340, 417–428 (2005)CrossRefGoogle Scholar
  7. 7.
    Baglioni, P., et al.: Micelle, microemulsions, and gels for the conservation of cultural heritage. Adv. Colloid Interface Sci. 205, 361–371 (2014)CrossRefGoogle Scholar
  8. 8.
    Grassi, S., Favaro, M., Tomasin, P., Dei, L.: Nanocontainer aqueous systems for removing polymeric materials from marble surfaces: a new and promising tool in cultural heritage conservation. J. Cult. Herit. 10(3), 347–355 (2009)CrossRefGoogle Scholar
  9. 9.
    Deng, J., Shi, Z., Li, X., Liu, H.: Soluble Polysaccharides Isolation and Characterization from Rabbiteye Blueberry (Vaccinium ashei) Fruits. BioResources 8(1), 405–419 (2013)Google Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • Pagona-Noni Maravelaki
    • 1
    Email author
  • Lucia Toniolo
    • 2
  • Francesca Gherardi
    • 2
  • Chrysi Kapridaki
    • 1
  • Ioannis Arabatzis
    • 3
  1. 1.Technical University of CreteChaniaGreece
  2. 2.Politecnico di MilanoMilanItaly
  3. 3.NanoPhos SALavrioGreece

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