000003013 001__ 3013
000003013 005__ 20141118153411.0
000003013 04107 $$acze
000003013 046__ $$k2010-09-22
000003013 100__ $$aFragata, A.
000003013 24500 $$aSalt crystallization in substitution renders for historical constructions

000003013 24630 $$n2.$$pHistoric Mortars and RILEM TC 203-RHM Final Workshop
000003013 260__ $$bRILEM Publications s.a.r.l., 157 rue des Blains F-92220 Bagneux - France
000003013 506__ $$arestricted
000003013 520__ $$2eng$$aSalt damage is one of the major causes of render decay, not only near the sea but also in continental areas. These salts can appear in the walls from different sources: from the ground due to rising damp, carried by the wind as salt spray, flooding or originally present in materials, like unwashed beach sand or due to the salt transport behaviour of the substrate/render and the surrounding ambience severity (temperature and relative humidity) producing salt crystallization. In this paper an experimental laboratory campaign was developed where perforated red bricks rendered on both sides with four different render compositions and different permeability, were submitted to capillary absorption in a sodium chloride solution. Particular attention was given to the influence of different render solutions when contaminated with NaCl and attention was given to the several dissolution-crystallisation cycles: (a) in the location of sodium chloride crystallization in the specimens; (b) crystallization quantification of different specimens. The final goal is to understand the relation between the more or less permeable renders and the damage mechanisms of NaCl dissolutioncrystallization cycles, in order to propose possible solutions to stop or slow down the salt decay process in walls contaminated subjected to changes in ambient temperature and relative humidity and contaminated with salt.

000003013 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000003013 653__ $$a

000003013 7112_ $$a2nd Conference and of the Final Workshop of RILEM TC 203-RHM$$cPrague (CZ)$$d2010-09-22 / 2010-09-24$$gHMC2010
000003013 720__ $$aFragata, A.$$iVelosa, A.L.$$iVeiga, R.
000003013 8560_ $$ffischerc@itam.cas.cz
000003013 8564_ $$s369746$$uhttp://invenio.itam.cas.cz/record/3013/files/page_0983.pdf$$y
             Original version of the author's contribution as presented on CD, , page 983.
            
000003013 962__ $$r2907
000003013 980__ $$aPAPER