22 KB549 KB21 KB200020262012Hees, Rob P. J. vanLubelli, BarbaraNijland, Timo G.številka:3letnik:46str. 291-296ISSN:1580-2949COBISSID:934826URN:URN:NBN:SI:doc-FWNCNCURenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijeapnena maltadolomitic mortardolomitna maltamicrostructuremikrostrukturasamopopravaself-healingSimulation of the self-healing of dolomitic lime mortar| Simulacija samopoprave dolomitne apnene malte|A test procedure was set up to reproduce laboratory self-healing on lime-based (both pure calcium and magnesium-calcium) mortar specimens. After a few months of testing, during which time the specimens were submitted to wet-dry cycles, thin sections of the specimens were prepared and observed using a polarization and fluorescence microscope (PFM) and a scanning electron microscope (SEM) equipped with an energy-dispersive X-ray spectrometer (EDX). The specimens prepared with dolomitic lime showed the occurrence of self-healing: a magnesium compound was observed to be filling the cracks and voids. These results suggest new possibilities for the development of dolomitic lime mortars with an increased self-healing capacityPripravljen je bil postopek laboratorijskega reproduciranja samopoprave vzorcev (na osnovi čistega kalcija in magnezij-kalcija) apnene malte. Po nekaj mesecih preizkušanja, med katerim so bili vzorci ciklično močeni in sušeni, so bile pripravljene tanke rezine za opazovanje s polarizacijskim in fluorescenčnim mikroskopom (PFM) ter z vrstičnim elektronskim mikroskopom (SEM), opremljenim z energijsko disperzijsko spektroskopijo (EDX). Vzorci, pripravljeni iz dolomitnega apna, so pokazali pojave samopoprave: magnezijeva sestavina je napolnila razpoke in praznine. Ti rezultati nakazujejo nove možnosti za razvoj dolomitnih apnenih malt s povečano sposobnostjo samopopraveTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije