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Repair Mortars/Grouts for Reinstatement of Stone Units in Historic Structures

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Part of the Cultural Heritage Science book series (CUHESC)

Abstract

Stone units (shaped or unshaped) are the components of many historical masonries found in monuments such as archaeological sites, ancient theaters, castles, monasteries, arched bridges, and industrial buildings. A great variety of locally available stones have been used in the past, but nowadays the old quarries/deposits do not often exist. Therefore, there is need to reinstate old stone units with mortars/grouts to produce artificial stone pieces to replace the missing parts in restoration works. These repair mortars/grouts should fulfill conceptual, functional, and technical requirements with respect to their compatibility with old stone (color and texture harmonization, good adhesion to substrate, resistance to environmental conditions, no secondary reaction products, etc.). Furthermore, before the selection or design of a repair material (mortar/grout), a systematic analysis of the original stone pieces and environmental conditions affecting their degradation should be well understood and considered. Improvement to the composition of repair materials should be made by using additives and taking measures for good practice in the execution of old stones reinstatement or replacement works.

Three selected case studies concerning two archaeological sites and an ancient theater are also presented. Problems confronted in practice are recognized, and possibilities to overcome them are suggested.

Keywords

  • Historic masonry
  • Stone units
  • Reinstatement
  • Replacement
  • Mortars/Grouts
  • Case studies

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  • DOI: 10.1007/978-3-030-82942-1_7
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Papayianni, I. (2022). Repair Mortars/Grouts for Reinstatement of Stone Units in Historic Structures. In: Gherardi, F., Maravelaki, P.N. (eds) Conserving Stone Heritage. Cultural Heritage Science. Springer, Cham. https://doi.org/10.1007/978-3-030-82942-1_7

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