Selected Projects

At these projects, our products were successfully applied

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Merlion, Singapur

The Merlion is the national symbol and the patron saint of the city-state of Singapore. The statue is depicted as a mythical creature with a lion head and a fish body. In the beginning of 2019, the statue was restored using out products.

Conservation:

  • Steam cleaning
  • Pre-treatment with CaLoSiL® E25
  • Crack filling and surface treatment with CaLoSiL® micro, CaLoXiL injection mortar, filler and repair mortar
  • Application of biocides
  • Additional consolidation with CaLoSiL® E25 followed by silica acid esters

Executive company: Resto-Werkz PTE. LTD., Singapore

St. Augustine Statue, Warsaw, Poland

The statue can be visited at the Visitationist Church in Warsaw. The church is one of the most important sacred buildings of the 18th century. The enormous damage on the statue was mainly caused by weathering and previously, inappropriately performed conservation. The restoration took place in 2009 in context of the Stonecore project in close collaboration with IBZ-Salzchemie. Together with the royal emblem of John II, the statue served as trial project for our products. Because of the outstanding results of this project, the treatment of the whole frontage with our CaLoSiL® products followed.

Conservation:

  • Mechanical cleaning of the paint coating and the spackling pastes from the stucco work surfaces
  • Mechanical removal of the technologically faulty cement and epoxy-based fillings
  • Removal of the corroded anchors and frames, simultaneous, preliminary reinforcement and gluing of the degraded original fabric
  • Dismantling of the loose elements of the stucco decoration
  • Structural reinforcement and consolidation of the weakened parts of the stucco work with CaLoSiL® E25 injection
  • Stabilizing and Gluing of movable objects of the stucco
  • Filling cavities and reconstruction of the missing forms
  • Final treatment of the surfaces

Executive company: Restauro, Poland

The Royal Coat of Arms of John II Casimir Vasa and Marie Louise Gonzaga, Warsaw, Poland

The royal coat of arms is located at the Visitationist Church in Warsaw as the St. Augustine Statue. The restauration took place in 2009 as part of the Stonecore project. Together with the royal emblem of John II, the statue served as trial project for our products. Because of the outstanding results of this project, the treatment of the whole frontage with our CaLoSiL® products followed.

Conservation:

  • Mechanical cleaning of the paint coating and the spackling pastes from the stucco work surfaces
  • Mechanical removal of the technologically faulty cement and epoxy-based fillings
  • Removal of the corroded anchors and frames, simultaneous, preliminary reinforcement and gluing of the degraded original fabric
  • Dismantling of the loose elements of the stucco decoration
  • Structural reinforcement and consolidation of the weakened parts of the stucco work with CaLoSiL® E25 injection
  • Stabilizing and Gluing of movable objects of the stucco
  • Filling cavities and reconstruction of the missing forms
  • Final treatment of the surfaces

Executive company: Restauro, Poland

Clay ceiling with painting, Freiberg, Germany

The ceiling painting with decorative ornamental secco painting is located in a merchant’s house in Freiberg. It was exposed as part of a renovation project and the creation time is to be estimated at the 16th century. The substrate is a thin lime plaster of lime slurry on a clay straw filling. The pigments of the paint as well as whole slices of the lime plaster detached very easily. The increased moisture during the renovation also resulted in mold growth

Conservation:

  • Consolidation of the painting with CaLoSiL® E5
  • Reduction of the mold growth and drying of the wall with CaLoSiL® E5
  • Stabilizing and gluing of loose slices of plaster
  • Filling of missing parts with lime slurry

Executive company: Restorer S. Trömmer, Weilburg, Germany

Selected cooperation projects
2017 - 2019 ZIM – Development of novel materials and material combinations for conservation of plaster, mortar and stone as well as preventive conservation
2017 - 2019 SAB – Extension of the toolbox system for reconstruction of stone, plaster and mortar
2012 - 2014 ZIM – Development of novel materials for stabilization and conservation of murals and plaster, especially for salt and moisture containing, as well as differently absorbing surfaces
2008 - 2011 STONECORE – Conservation of stone for the preservation of buildings, development and application of nanomaterials for conservation and restoration of natural and artificial stone
Selected Literature of the topic of nanolime

Ziegenbalg, G., Drdácký, M., Dietze, C., Schuch, D., (editors)
Nanomaterials in Architecture and Art Conservation, Pan Stanford Publishing 2018, ISBN 978-981-4800-26-6.

Ziegenbalg, G. und Dietze, C.
Nanokalk in der Resautierung: Möglichkeiten, Grenzen und Erfahrungen beim Einsatz feindisperser Calciumhydroxid-Sole, Musem Aktuell 266 (2020), 25-31.

Frohberg, B. und Dietze, C.
Festigung von Renaissancebauteilen aus Gotländer-Sandstein in der Dorfkirche Semlow Steinkonservierung 2020, 25-37.

Niedoba, K., Sližková, Z, Frankeová, D. Nunes, C.L., Jandejsek, I.,
Modifying the consolidation Depth of nanolime on Maastrich limestone, Construction and Building Materials 133 (2017) 51-56.

Rodriguez-Navarro, C. and Ruiz-Agudo, E.,
Nanolimes: from synthesis to application, Pure Appl. Chem., 2017, 2-28.

Vojtĕchovský, J.,
Surface consolidation of wall paintings using lime nano-suspensions. Acta Polytechnica 57(2): 139-148, 2017.

Rodriguez-Navarro, K. Elert, R. Ševcik.
Amorphous and crystalline calcium carbonate phases during carbonation of nanolimes: Implications in heritage conservation, CrystEngComm. 18, 6594-6607, 2016.

Sližková, Z., Bayer, K., Weber, J., (Hrsg.)
Nanolith, Konservierung von Leithakalken auf Basis von Calciumhydroxid-Nanopartikeln, Ústav teoretické a aplikované mechaniky AV ČR v. v. i., Praha, 2016.

Dähne, A.; Herm, C.
Calcium hydroxide nanosols for the consolidation of porous building materials – results from EU-Stonecore, Heritage Science 2013, 1:11.

Michalcova and Nedela and Tribulova and Durovic and Slouf,
Utilization of Ca(OH)2 Nanoparticles in paper deacidification, 2012, Nanocon 2012.