18 KB261 KB16 KB200020242012Borsoi, GiovanniSilva, António SantosTavares, MarthaVeiga, Maria do Rosárioštevilka:3letnik:46str. 223-226ISSN:1580-2949COBISSID:933546URN:URN:NBN:SI:doc-9LLJHENJenInštitut za kovinske materiale in tehnologijeMateriali in tehnologijecompabilityconsolidationkompatibilnostmicrostructuremikrostrukturananomaterialinanoproductsnanoproizvodiutrjevanjevezivaMicrostructural and physical-mechanical analyses of the performance of nanostructured and other compatible consolidation products for historical renders| Mikrostruktura in fizikalno-mehanske lastnosti nanostrukturnih in drugih kompatibilnih proizvodov za utrjevanje zgodovinskih ometov|The surface consolidation of historical renders, directed to restore cohesion and stability, is based on the use of materials with aggregating properties. This operation is usually achieved with the use of inorganic or mineral consolidants, which are preferred to organic ones, due to the better compatibility and durability. Based on the results of previous studies, two mineral-compatible products were selected: a commercial dispersion of calcium hydroxide nanoparticles in propanol and a calcium-silicate product, consisting of a limewater dispersion of ethyl silicate. The consolidation products were applied to mortar specimens in order to assess their efficacy by determining their microstructural and physical-mechanical properties, before and after the consolidation treatment. Microstructural (optical and SEM microscopy) and chemical analyses of the consolidation products and of the consolidated samples were performed. The physical-mechanical analyses, i.e., the superficial hardness, is reported tooUtrjevanje površine zgodovinskih ometov z vidika ohranjanja kohezije in stabilnosti temelji na uporabi materialov z vezivno sposobnostjo. To se navadno doseže z uporabo neorganskih ali mineralnih utrjevalcev, ki so v prednosti pred organskimi zaradi boljše skladnosti in zdržljivosti. Na podlagi predhodnih študij sta bili izbrani dve vezivi: komercialna disperzija delcev kalcijevega hidroksida v propanolu in proizvod na osnovi kalcijevega silikata, ki vsebuje apnovico, dispergirano v etil silikatu. Namen uporabe vzorcev veziv na vzorcih malte je bil ugotoviti njihovo učinkovitost z določitvijo mikrostrukture in fizikalno-mehanskih lastnosti, pred obdelavo z vezivom in po njej. Izvršene so bile raziskave mikrostrukture (svetlobna in SEM-mikroskopija), kemijska analiza vzorcev veziv in vzorcev po utrjevanju, fizikalno-mehanski preizkusi, poročamo pa tudi o trdoti površineTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije