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Construction and materials of Visby medieval city wall – risk of damage
Uppsala University, Disciplinary Domain of Humanities and Social Sciences, Faculty of Arts, Department of Art History. (Kulturvård)ORCID iD: 0000-0002-2994-1766
2014 (English)In: 9th IMC, Book of Abstract / [ed] Paulo B. Lourenco, Barry A. Haseltine, Graca Vasconcelos, 2014Conference paper, Abstract (Refereed)
Abstract [en]

The City Wall in Visby was built in two periods in 13th and 14th century. The first wall was made as a lower three-leaf wall with two shells built of lime stone and fat lime mortar and a soft and porous rubble core of lime stone and clay mortar. The second wall was built higher on top of the old one. It was mostly built as a solid wall in lime stone and lime mortar. Due to its construction and form, a major part of the force is carried by the outer shell of the wall. As restorations have been made during 20th century the joints of lime mortar has been partly repointed with strong cement mortar, followed by leached lime inside from the mortar in the wall. In February 2012 a part of the wall collapsed and fell down as the outer shell of the masonry collapsed. This paper presents an analysis of the wall structure and its materials as well as the increased risk of damage due to the restorations of the 20th century.

Place, publisher, year, edition, pages
Keyword [en]
city wall, lime mortar, clay mortar, three-leaf wall, rubble core, masonry structure, deterioration
National Category
Research subject
History of Art
URN: urn:nbn:se:uu:diva-237218ISBN: 978-972-8692-85-8OAI: oai:DiVA.org:uu-237218DiVA: diva2:767199
9th International Masonry Conference 2014, Guimarães, Portugal, July 7-9, 2014
Available from: 2014-12-01 Created: 2014-12-01 Last updated: 2015-02-12Bibliographically approved

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Balksten, Kristin
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