Abstract
This article focuses on repair or replacement mortars for historical buildings. Both the decision process and questions arising are dealt with, in order to better define and illustrate technical requirements for mortars to be used for the repair or restoration of monuments and historic buildings (masonry mortars, plasters, renders…). The article summarizes a longer document, meant to help professionals in their decisions on the interventions, taking into account aspects, which are ranging from the ethics of restoration to the technical requirements.
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Notes
Compatible is defined as: not causing any damage (in a broad sense, ranging from technical to aesthetic and historical) to the existing fabric and being as durable as possible under that condition.
Brick dust may act as a filler, rather than as a pozzolan contributing to compressive strength or flexural strength. It can contribute to the impermeability of a mortar and it also favours a high water retention.
NB one should be aware in this case of the risk of introducing sulfates; apart from this, nowadays normally only higher fired brick will be available.
References
Groot C, Ashall G, Hughes J (eds) (2004) Characterisation of old mortars with respect to their repair—RILEM report 28. ISBN: 978-2-912143-56-3, e-ISBN: 2912143675. www.rilem.net/repDetails.php?rep=rep028. Accessed 4 August 2010
van Hees R, Naldini S, Binda L, Van Balen K (2008) The use of MDDS in the visual assessment of masonry and stone structures. In: Binda L, di Prisco M, Felicetti R (eds) Proceedings of the 1st Rilem symposium on site assessment of concrete, masonry and timber structures, SACOMATIS, Varenna (It), Sept. 2008, pp 651–660
Rilem TC (2009) 203-RHM: repair mortars for historic masonry, testing of hardened mortars, a process of questioning and interpreting. Mater Struct 42(7):853–867
Papayianni I (2005) Design and manufacture of repair mortars for interventions on monuments and historical buildings. RILEM TC, 2nd international workshop on repair mortars for historic masonry, RILEM TC RMHM2 Delft, Netherlands, January 26–28, 2005
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TC-Membership:
Chairman: Caspar Groot, The Netherlands.
Secretary: John J. Hughes, Scotland.
Members: Koen van Balen, Belgium; Beril Bicer-Simsir, USA; Luigia Binda, Italy; Jan Elsen, Belgium; Rob van Hees, The Netherlands; Thorborg von Konow†, Finland; Jan Erik Lindqvist, Sweden; Paul Maurenbrecher, Canada; Ioanna Papayanni, Greece; Maria Subercaseaux, Canada; Cristina Tedeschi, Italy; Eleni-Eva Toumbakari, Greece; Margaret Thompson, USA; Jan Valek, Czech Republic; Rosario Veiga, Portugal.
Acknowledgments: The contributions to this study and to the TC 203-RHM by Christine Bläuer, Switzerland; Bernhard Middendorf, Germany; Stefan Simon, Germany; Maria Stefanidou, Greece, and Yves Vanhellemont, Belgium, are gratefully acknowledged.
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TC 203-RHM (Main author: Rob van Hees). RILEM TC 203-RHM: Repair mortars for historic masonry. Mater Struct 45, 1295–1302 (2012). https://doi.org/10.1617/s11527-012-9917-z
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DOI: https://doi.org/10.1617/s11527-012-9917-z