11 KB55 KB9 KB199219991998Apih, VeraDucman, VilmaKovačević, MihaelaSever Škapin, Andrijanaštevilka:3/4letnik:32str. 205-207ISSN:1318-0010COBISSID:167271URN:URN:NBN:SI:doc-YL7LHUJBslInštitut za kovinske materiale in tehnologijeŽelezarna JeseniceŽelezarna RavneŽelezarna ŠtoreKovine zlitine tehnologijemehanske lastnostimineralna vlaknaploščestaranjeVpliv pospešenega staranja na mehanske lastnosti plošč iz mineralnih vlaken| The influence of accelerated ageing on the mechanical properties of mineral-wool boards|The aim of the experiments described in the contribution was to determine the resistance of mineral-wool boards to weathering. It has been frequently observed that the mechanical properties of such boards worsen after they have been stored and/or exposed to weathering for longer periods of time. In the experiments, mineral-wool boards were subjected to accelerated ageing in a climatic chamber, at temperatures ranging from -20oC to +50oC, and under different conditions of relative humidity. The compressive strength and tensile strength of the tested samples were measured on aged and non-aged boards. It was found that the compressive strength of the aged boards was reduced by up to approximately 20% in comparison with that of non-aged boards,whereas tensile strength was reduced by to 70%Pri ploščah iz mineralnih vlaken opažamo, da po daljšem času skladiščenja in/ali izpostavljanja vremenskim razmeram izgubljajo svoje prvotne mehanske lastnosti. Da bi ugotovili odpornost plošč na učinkovanje vremenskih vplivov vlaženja, sušenja in cikličnih sprememb temperature, smo plošče pospešeno starali v klimatski komori pri temperaturah od -20oC do +50oC in različnih stopnjah relativne vlage. Pri staranih in nestaranih ploščah smo izmerili tlačno odpornost in razplastno trdnost ter ugotovili, da se tlačna odpornost staranih plošč zmanjša za cca 20% glede na nestarane, medtem ko se razplastna trdnost plošč zmanjša tudi do 70%Nadaljuje se kot: Materiali in tehnologijeTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije