Repair mortars for the sandstones of the cathedral of Berne

Title: Repair mortars for the sandstones of the cathedral of Berne
Author(s): C. Bläuer, H. Häberli, A. Löffel, B. Rousset
Paper category : conference
Book title: 2nd Conference on Historic Mortars - HMC 2010 and RILEM TC 203-RHM final workshop
Editor(s): J. Válek, C. Groot and J.J. Hughes
Print-ISBN: None
e-ISBN: 978-2-35158-112-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 909 - 916
Total Pages: 8
Nb references: 7
Language: English

Abstract: Stone repair mortars used on the cathedral of Berne (Switzerland) have been refined from existing recipes. These hydraulic mortars without any organic additions are prepared on the building site. They are applied as two different layers, a coarser ground layer (KMtl) and a finer surface layer (DMtl) which imitates the stone material. The investigations were undertaken to understand the overall good practical experiences with these materials, and to anticipate the long term performance of this mortar system under the rough exposure conditions on the cathedral. Laboratory investigations included, petrophysical measurements and thin section analysis, of the individual materials but also on the system of DMtl-KMtl-stone. The investigations suggest that the mortars used are in many ways well adapted to the sandstones on the monument and that the diverse application methods only provoke small differences in the resulting mortars at an early stage. But only in situ observations will be able to show whether these small differences will lead to problems after long exposure to the elements.

Online publication: 2010-10-25
Publication type : full_text
Public price (Euros): 0.00