Central Technological Library of the University of Ljubljana (CTK)
13.
Uporaba polimerov pri sanaciji preliva pregrade Moste
Šušteršič, Jakob
Polimerne kompozite (betone, malte, premaze, kontaktna sredstva) lahko razdelimo na: -čiste polimerne kompozite (kjer je vezivna komponenta samo polimer), -s polimerom modificirane kompozite (kjer je ...vezivna komponenta sestavljena iz polimera in cementa) in -s polimerom impregnirane kompozite (kjer se element iz betona ali naravnega kamna impregnira z monomerom, ki po določeni tehnološki obdelavi preide v polimer in s tem dodatno poveže porozna struktura betona in kamna). Pri sanaciji preliva pregrade Moste so se uporabljali s polimerom modificirani kompoziti (PMK) (malte za sanacijo in prevleka, ki je glavni predmet obravnave). Po definiciji je PMK kompozitni material, ki ga sestavljajo portland cement, agregat in organski polimeri, dispergirani in redispergirani v vodi. Polimerna disperzija se imenuje lateks, ki se v praksi zelo posto uporablja. V primerjavi s strjenim normalnim kompozitom imajo PMK na splošno večjo sprijemno trdnost, manjšo prepustnost, večjo odpornost na vpliv zmrzovanja odtaljevanja in večjo upogibno trdnost. Seveda so te in druge lastnosti odvisne od sestave PMK in uporabljenih komponent.
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