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Optimised microstructure of calcium sulphate-based mortars for the restoration of historic masonry



Title: Optimised microstructure of calcium sulphate-based mortars for the restoration of historic masonry
Author(s): V. Tesch, B. Middendorf
Paper category : conference
Book title: Workshop Repair Mortars for Historic Masonry
Editor(s): C. Groot
Print-ISBN: None
e-ISBN: 978-2-35158-083-7
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 345 - 353
Total Pages: 9
Nb references: 21
Language: English


Abstract: The use of gypsum based mortar has a very long tradition. In Germany, especially in the neighbourhood of natural gypsum outcrops, gypsum mortars, gypsum lime and gypsum anhydrite lime mortars were used for construction of sacred buildings. Despite of the high water solubility (2.6 g/l) and of the low wet compressive strength of gypsum mortars they were used for exterior masonry. Today even joints of the masonry exposed to weathering are still in reasonable good condition. However, some of the cultural historical important buildings are due to restoration. Nowadays it is well known that restoration should consider the original building materials. So it is necessary to develop a compatible calcium sulphate based restoration mortar. Depending on the original substance restoration mortars have to accomplish certain physico-mechanical properties (e.g., comp. strength, porosity).


Online publication: 2009-06-08
Publication type : full_text
Public price (Euros): 0.00