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V diplomski nalogi smo na osnovi eksperimentalnih analiz določili mrazoobstojnost betona z dodatkom elektrofiltrskega pepela in reciklirane gume. Kot nadomestek dela veziva smo uporabili dva tipa pepela, kot nadomestek dela agregata pa reciklirano gumo iz SR, EMPD in EPM. Vsem vzorcem je bil za izboljšanje mrazoobstojnosti dodan aerant. Polovico vzorcev smo izpostavili zmrzovanju in tajanju, njihove mehansko-fizikalne lastnosti smo primerjali z nezmrzovanimi vzorci. Na vseh vzorcih smo izvedli preizkuse tlačne trdnosti, s pomočjo ultrazvoka pa smo jim izmerili še modul elastičnosti. Na podlagi rezultatov lahko zaključimo, da samo zmrzovanje in tajanje na tlačno trdnost in modul elastičnosti ni vplivalo toliko, kot je na te lastnosti vplivala izbira elektrofiltrskega pepela. Rezultati so pokazali, da so tudi delci reciklirane gume dobro vplivali predvsem na mrazoobstojnost betona, saj so delci povečali mesta, kjer se lahko med zmrzovanjem širi led, ki je nastal med zmrzovanjem. In this thesis, on the basis of experimental analyzes, the freeze/thaw resistance of concrete was determined by the addition of fly ash and recycled rubber. As a substitute for the Portland cement, two types of ash were used, and the recycled rubber was used as a substitute for the mineral aggregate. An air entainer was added to all the samples to improve the freeze/thaw resistance. Half of the samples were exposed to frost, so we could compare each other how freezing and thawing affects the properties of the samples themselves. All samples were tested for compressive strength, and with the help of ultrasound we also measured the elastic modulus. Based on the results we concluded that the freezing and thawing did not affect the compressive strength and modulus of elasticity as much as these features were affected by the choice of fly ash. |
