Sprememba upogibne trdnosti in modula elastičnosti iverne in OSB plošče zaradi izpostavitve vodi

diplomsko delo

Luka Černe (Author), Bogdan Šega (Reviewer), Sergej Medved (Mentor)

Abstract

V nalogi smo ugotavljali vpliv vode na debelinski nabrek, upogibno trdnost in modul elastičnosti iverne in OSB plošče. Plošče smo za 24 oz. 240 ur potopili v vodo. Eno serijo preskušancev smo po 240 urnem namakanju v sušilniku pri 103 °C posušili do absolutno suhega stanja. Ugotovili smo, da se z daljšanjem časa izpostavitve debelinski nabrek plošč veča. Večji nabrek smo opazili pri OSB plošči. Pri sušenju sta se obe plošči procentualno približno enako skrčili. Modul elastičnosti je bil v začetnem suhem stanju pri obeh ploščah približno enak, upogibna trdnost pa je bila višja pri OSB plošči. Po 24 urah namakanja v vodi smo pri obeh ploščah ugotovili približno enak padec trdnosti in modula elastičnosti. Posledica 240 urnega namakanja je bilo dodatno poslabšanje mehanskih lastnosti, ki je bilo bistveno večje pri OSB plošči. Mehanske lastnosti predhodno namočenih plošč so se s sušenjem izboljšale, višje vrednosti smo izmerili pri iverni plošči.

Keywords

iverna plošča;OSB plošča;modul elastičnosti;upogibna trdnost;debelinski nabrek;

Data

Language:	Slovenian
Year of publishing:	2019
Typology:	2.11 - Undergraduate Thesis
Organization:	UL BF - Biotechnical Faculty
Publisher:	[L. Černe]
UDC:	630862:630812
COBISS:	3109001
Views:	728
Downloads:	183
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Change in bending strength and modulus of elasticity of particleboard and OSB due exposure to water
Secondary abstract:	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.
Secondary keywords:	particleboard;OSB;modulus of elasticity;bending strength;thickness swelling;
Type (COBISS):	Bachelor thesis/paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Pages:	VII, 16 f., [6] f. pril.
ID:	11222786