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Blast furnace slag in historic mortars of Bergslagen, Sweden



Author(s): Jan Erik Lindqvist, Kristin Balksten, Birgit Fredrich
Paper category: Proceedings
Book title: Proceedings of the 5th Historic Mortars Conference
Editor(s): José Ignacio Álvarez, José María Fernández, Íńigo Navarro, Adrián Durán, Rafael Sirera
ISBN: 978-2-35158-221-3
e-ISBN: 978-2-35158-222-0
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 585-595
Total Pages: 11
Language : English


Abstract: Water cooled granulated blast furnace slag is today commonly used as a binder mixed
with cement. Since the late 18th century blast furnace slag was used as an additive in
bedding and pointing mortars of lime in the area of Bergslagen, the iron producing
area in central Sweden. This type of mortars has not been documented and described
previously in Sweden. The aim with the present project has been to document possible
traditional use of slag in mortars in iron producing areas in Sweden and to see if it is
possible to identify puzzolanic or hydraulic reactions. During the studied time period
granulated blast furnace slag was invented, but this is not reflected in the studied
material. The unsuitable chemical composition of the slag gave it a very low reactivity.
As this study only included a small part of the production sites, it is still possible that
some furnace produced slag with a composition that could give a better reactivity.
Keywords: slag mortar, slag cement, blast furnace slag, hydraulic additive, lime mortar


Online publication : 2019
Publication type : full_text
Public price (Euros) : 0.00


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