Potreba po izboljšanju energetske učinkovitosti za doseganje ugodnih bivalnih pogojev v stavbah narekuje trend uporabe t.i. pametnih materialov v gradbeništvu, kamor sodijo tudi cementni kompoziti z ...dodatkom fazno spreminjajočih materialov (ang. phase change material PCM). Fazno spreminjajoči materiali (PCMs) so materiali, ki ob spremembi agregatnega stanja sprejemajo ali sproščajo toploto. Za namen preiskav smo pripravili cementni kompozit z dodatkom PCM na osnovi enkapsuliranih voskov s poliuretansko membrano. Cementni kompoziti so bili pripravljeni z dolomitnim agregatom ter portlandskim cementom CEM I 42.5N kot vezivom. S pomočjo optične (OM) in elektronske mikroskopije (SEM/EDS) smo opazovali mikrostrukturo cementnega kompozita ter obstojnost PCM pri različnih temperaturah (40, 60 in 100 °C). Rezultati preiskav izkazujejo enakomerno razporeditev kapsul PCM v betonskih kompozitih ter glede na izmerjene mehanske lastnosti napovedujejo potenc ialno uporabnost le-teh kot modernega gradbenega materiala.
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