000002950 001__ 2950
000002950 005__ 20141118153413.0
000002950 04107 $$acze
000002950 046__ $$k2010-09-22
000002950 100__ $$aWacha, R.
000002950 24500 $$aGravel Lime? Research into Danube gravel as the main ingredient of the historic mortars at Castle Prandeggin Upper Austria

000002950 24630 $$n2.$$pHistoric Mortars and RILEM TC 203-RHM Final Workshop
000002950 260__ $$bRILEM Publications s.a.r.l., 157 rue des Blains F-92220 Bagneux - France
000002950 506__ $$arestricted
000002950 520__ $$2eng$$aLime was, aside from clay, the main historic mortar material for castles in the northern part of Upper Austria. As there are no geological sources of limestone in the region, the question posed was - how were the necessary amounts of quicklime produced and transported? The assumption that the source of the historic quicklime could be burned Danube pebbles arose as results of analyses on the historic mortar samples from the castle ruin of Prandegg showed constant slight impurities of magnesia/silica and non-burnable pebbles with glass-like surfaces in the cores of the ruin walls. The hydraulic properties of the mortars could be traced to the mixture of limestone and quartz pebbles common in Danube gravel. A complete reconstruction of the historic mortar of Prandegg was performed by burning Danube river gravel as part of an archaeological experiment. During the slaking all burned limestone pebbles completely turned into a homogeneous lime putty. The reconstructed “Danube gravel” lime mortar was then confirmed as the historical source as it showed, aside from the magnesia and silica phases, a general similarity to the historic mortar in its chemical and physical structure.

000002950 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000002950 653__ $$a

000002950 7112_ $$a2nd Conference and of the Final Workshop of RILEM TC 203-RHM$$cPrague (CZ)$$d2010-09-22 / 2010-09-24$$gHMC2010
000002950 720__ $$aWacha, R.
000002950 8560_ $$ffischerc@itam.cas.cz
000002950 8564_ $$s698589$$uhttps://invenio.itam.cas.cz/record/2950/files/page_0389.pdf$$y
             Original version of the author's contribution as presented on CD, , page 389.
            
000002950 962__ $$r2907
000002950 980__ $$aPAPER