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Sprememba upogibne trdnosti in modula elastičnosti iverne in OSB plošče zaradi izpostavitve vodi
ID Černe, Luka (Avtor), ID Medved, Sergej (Mentor) Več o mentorju... Povezava se odpre v novem oknu

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Izvleček
V nalogi smo ugotavljali vpliv vode na debelinski nabrek, upogibno trdnost in modul elasticnosti iverne in OSB plosce. Plosce smo za 24 oz. 240 ur potopili v vodo. Eno serijo preskusancev smo po 240 urnem namakanju v susilniku pri 103 °C posusili do absolutno suhega stanja. Ugotovili smo, da se z daljsanjem casa izpostavitve debelinski nabrek plosc veca. Vecji nabrek smo opazili pri OSB plosci. Pri susenju sta se obe plosci procentualno priblizno enako skrcili. Modul elasticnosti je bil v zacetnem suhem stanju pri obeh ploscah priblizno enak, upogibna trdnost pa je bila visja pri OSB plosci. Po 24 urah namakanja v vodi smo pri obeh ploscah ugotovili priblizno enak padec trdnosti in modula elasticnosti. Posledica 240 urnega namakanja je bilo dodatno poslabšanje mehanskih lastnosti, ki je bilo bistveno vecje pri OSB plosci. Mehanske lastnosti predhodno namocenih plošč so se s susenjem izboljsale, visje vrednosti smo izmerili pri iverni plosci.

Jezik:Slovenski jezik
Ključne besede:iverna plosca, OSB plosca, modul elasticnosti, upogibna trdnost, debelinski nabrek
Vrsta gradiva:Diplomsko delo/naloga
Tipologija:2.11 - Diplomsko delo
Organizacija:BF - Biotehniška fakulteta
Založnik:[L. Černe]
Leto izida:2019
PID:20.500.12556/RUL-110230 Povezava se odpre v novem oknu
UDK:630*862:630*812
COBISS.SI-ID:3109001 Povezava se odpre v novem oknu
Datum objave v RUL:13.09.2019
Število ogledov:1287
Število prenosov:209
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Sekundarni jezik

Jezik:Angleški jezik
Naslov:Change in banding strenght and modulus of elasticity of particleboard and OSB due exposure to wather
Izvleček:
The thesis focused on determining the influences of water on the thickness swelling, bending strength and elastic modulus of the chipboard and the OSB board. The test was conducted by immersing the boards in water for 24 or 240 hours. Following soaking for 240 hours, one batch of test pieces was dried up in a furnace until an absolutely dry condition was achieved. It was then established that the prolongation of exposure time caused the thickness of the boards to increase. Also a higher swelling was observed in the OSB board. However, both boards had more or less uniformly reduced in size. The elastic modulus was similar in both boards in the initial dry state; whereas, the bending strength was higher in the OSB board. Following 24 hours of immersion it was established that the strength and the elastic modulus decreased in both board types. Immersion for 240 hours also resulted in the deterioration of chemical properties, which was more significant in the OSB board. The mechanical properties of previously immersed boards had improved after drying, particularly those of the chipboard.

Ključne besede:particleboard, OSB, modulus of elasticity, bending strength, thickness swelling

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