000002932 001__ 2932
000002932 005__ 20141118153414.0
000002932 04107 $$acze
000002932 046__ $$k2010-09-22
000002932 100__ $$aJohansson, S.
000002932 24500 $$aTraditional mortars with burned alum shale as artificial pozzolan

000002932 24630 $$n2.$$pHistoric Mortars and RILEM TC 203-RHM Final Workshop
000002932 260__ $$bRILEM Publications s.a.r.l., 157 rue des Blains F-92220 Bagneux - France
000002932 506__ $$arestricted
000002932 520__ $$2eng$$aFrom the mid-18th century extensive research in Sweden and in present day Finland was focused on the development of mortars with hydraulic and pozzolanic properties. The results were mainly published by the Royal Swedish Academy of Science. The aim was to replace the imported Italian pozzolan and Dutch trass with a pozzolan produced in Sweden. Several products based on burned alum shale were developed. Cambrian alum shales with a high content of bitumen were fired without additional fuel in order to produce pozzolanic shale ash. The bituminous alum shale was used directly as fuel in the lime burning process from the late 18th century. The alum shale mortars have a red-brown colour due to the high content of iron oxides. The mortars are hard, strong and generally have good durability both as masonry mortars and renders. Microscopic analysis shows that often only a skeleton remains of the shale particles and that a large part of the particles has been consumed by the pozzolanic reaction. The field of application was initially mainly structures in contact with water, such as locks in canals and harbours, but building construction was also an early application.

000002932 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000002932 653__ $$a

000002932 7112_ $$a2nd Conference and of the Final Workshop of RILEM TC 203-RHM$$cPrague (CZ)$$d2010-09-22 / 2010-09-24$$gHMC2010
000002932 720__ $$aJohansson, S.$$iLindqvist, J.E.
000002932 8560_ $$ffischerc@itam.cas.cz
000002932 8564_ $$s475757$$uhttps://invenio.itam.cas.cz/record/2932/files/page_0239.pdf$$y
             Original version of the author's contribution as presented on CD, , page 239.
            
000002932 962__ $$r2907
000002932 980__ $$aPAPER