{"?xml":{"@version":"1.0"},"edm:RDF":{"@xmlns:dc":"http://purl.org/dc/elements/1.1/","@xmlns:edm":"http://www.europeana.eu/schemas/edm/","@xmlns:wgs84_pos":"http://www.w3.org/2003/01/geo/wgs84_pos","@xmlns:foaf":"http://xmlns.com/foaf/0.1/","@xmlns:rdaGr2":"http://rdvocab.info/ElementsGr2","@xmlns:oai":"http://www.openarchives.org/OAI/2.0/","@xmlns:owl":"http://www.w3.org/2002/07/owl#","@xmlns:rdf":"http://www.w3.org/1999/02/22-rdf-syntax-ns#","@xmlns:ore":"http://www.openarchives.org/ore/terms/","@xmlns:skos":"http://www.w3.org/2004/02/skos/core#","@xmlns:dcterms":"http://purl.org/dc/terms/","edm:WebResource":[{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JH7WWUZH/0182420e-656d-40ac-b500-2863cfa5ccd8/HTML","dcterms:extent":"16 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JH7WWUZH/58fbacd2-b54f-4b06-89fc-79ab11ebd1c5/PDF","dcterms:extent":"300 KB"},{"@rdf:about":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JH7WWUZH/46f19aaa-e904-4071-9d1c-457ae2521c06/TEXT","dcterms:extent":"14 KB"}],"edm:TimeSpan":{"@rdf:about":"2000-2024","edm:begin":{"@xml:lang":"en","#text":"2000"},"edm:end":{"@xml:lang":"en","#text":"2024"}},"edm:ProvidedCHO":{"@rdf:about":"URN:NBN:SI:DOC-JH7WWUZH","dcterms:isPartOf":[{"@rdf:resource":"https://www.dlib.si/details/urn:nbn:si:spr-ihg6vo21"},{"@xml:lang":"sl","#text":"Materiali in tehnologije"}],"dcterms:issued":"2012","dc:creator":["Gameiro, André Leal","Santos-Silva, Antonio","Veiga, Maria do Rosário","Velosa, Ana Luísa"],"dc:format":[{"@xml:lang":"sl","#text":"številka:2"},{"@xml:lang":"sl","#text":"letnik:46"},{"@xml:lang":"sl","#text":"str. 145-148"}],"dc:identifier":["ISSN:1580-2949","COBISSID:930218","URN:URN:NBN:SI:doc-JH7WWUZH"],"dc:language":"en","dc:publisher":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"dc:subject":[{"@xml:lang":"sl","#text":"apno"},{"@xml:lang":"en","#text":"lime"},{"@xml:lang":"sl","#text":"metakaolin"},{"@xml:lang":"en","#text":"microscopy"},{"@xml:lang":"sl","#text":"mikroskopija"},{"@xml:lang":"sl","#text":"termična analiza"},{"@xml:lang":"en","#text":"thermal analysis"},{"@rdf:resource":"http://www.wikidata.org/entity/Q542419"}],"dcterms:temporal":{"@rdf:resource":"2000-2024"},"dc:title":{"@xml:lang":"sl","#text":"Lime-metakaolin hydration products: a microscopy analysis| Produkti hidracije apno-metakaolin: mikroskopska analiza|"},"dc:description":[{"@xml:lang":"sl","#text":"Metakaolin (MK) is nowadays a well-known pozzolanic material being used in cement-based materials, like mortars and concretes. The reaction of MK with calcium hydroxide yields cementitious products, being calcium silicate hydrate (CSH), stratlingite (C2ASH8) and tetra calcium aluminium hydrate (C4AH13) the main phases formed at ambient temperature. The transformation of stratlingite and C4AH13 into hydrogarnet at long term is an important issue that may result in an increase in the porosity and a loss of compressive strength that can induce a complete material degradation. With the objective of studying the compounds formed in lime/MK pastes and their stability during time, blended pastes were prepared with several substitution rates (in weight) of lime by MK, and maintained at RH > 95 % and 23 2 °C. XRD and TGA-DTA were used to follow the kinetics of the lime/MK hydration as well the reaction products. Microscopic tests (SEM-EDS) results are performed and compared with the thermal and mineralogical data. The results obtained show that the quantity of the hydration products formed changes with the lime replacement, being the aluminum and calcium silicates more abundant in the higher MK content pastes, and C4AH13, C4AH11 and C2ASH8 the major phases formed up to 90 days of curing"},{"@xml:lang":"sl","#text":"Metakaolin (MK) je danes dobro poznan pocolanski material in se uporablja v gradivih na podlagi cementa, npr. malta in beton. Reakcija MK s kalcijevim hidroksidom ustvari cementne proizvode: kalcijev silikatni hidrat (CSH), stratlingit (C2ASH8) in tetra kalcij aluminijev hidrat (C4AH13) kot glavne faze, ki nastanejo pri temperaturi okolice. Transformacija stratlingita in C4AH13 v hidrogarnet po dolgem času je proces, ki lahko poveča poroznost in zmanjša tlačno trdnost ter lahko povzroči popolno degradacijo materiala. S ciljem raziskave spojin, ki so nastale v zmeseh apno-MK, in njihove časovne stabilnosti smo pripravili mešane mase z več deleži zamenjave (v masi) apna z VK in zorili pri RH > 95 % in 23 2 °C. XRD in TGA-DTA so bile uporabljene za spremljanje kinetike hidracije apna-MK in reakcijskih produktov. Rezultate mikroskopskih opazovanj (SEM-EDS) smo primerjali s termalnimi in mineraloškimi podatki. Dobljeni rezultati kažejo, da količina hidracijskih produktov z nadomestitvijo količine apna količina aluminijevih in kalcijeviih silikatov raste z vsebnostjo MK v masi in so C4AH13, C4ACH11, C2ASH8 glavne faze, nastale po 90 dneh zorenja"}],"edm:type":"TEXT","dc:type":[{"@xml:lang":"sl","#text":"znanstveno časopisje"},{"@xml:lang":"en","#text":"journals"},{"@rdf:resource":"http://www.wikidata.org/entity/Q361785"}]},"ore:Aggregation":{"@rdf:about":"http://www.dlib.si/?URN=URN:NBN:SI:DOC-JH7WWUZH","edm:aggregatedCHO":{"@rdf:resource":"URN:NBN:SI:DOC-JH7WWUZH"},"edm:isShownBy":{"@rdf:resource":"http://www.dlib.si/stream/URN:NBN:SI:DOC-JH7WWUZH/58fbacd2-b54f-4b06-89fc-79ab11ebd1c5/PDF"},"edm:rights":{"@rdf:resource":"http://rightsstatements.org/vocab/InC/1.0/"},"edm:provider":"Slovenian National E-content Aggregator","edm:intermediateProvider":{"@xml:lang":"en","#text":"National and University Library of Slovenia"},"edm:dataProvider":{"@xml:lang":"sl","#text":"Inštitut za kovinske materiale in tehnologije"},"edm:object":{"@rdf:resource":"http://www.dlib.si/streamdb/URN:NBN:SI:DOC-JH7WWUZH/maxi/edm"},"edm:isShownAt":{"@rdf:resource":"http://www.dlib.si/details/URN:NBN:SI:DOC-JH7WWUZH"}}}}