Staranje toplotno obdelanih lesenih talnih oblog

diplomsko delo

Rok Lesjak (Avtor), Aleš Straže (Recenzent), Željko Gorišek (Mentor)

Povzetek

Med življenjsko dobo lesenih talnih oblog prihaja do staranja ter s tem spreminjanja njihovih relevantnih lastnosti, ki pa jih je mogoče oceniti v krajšem času v simuliranih pogojih intenzivnega klimatskega obremenjevanja. V ta namen smo umetno pospešenemu staranju (UPS) izpostavili tri skupine zunanjih lesenih talnih oblog: v skupino A smo uvrstili le toplotno obdelane preizkušance, v skupinah B in C pa smo enake preizkušance še dodatno površinsko zaščitili z naravnim oljem. Med standardnim postopkom cikličnega obremenjevanja z ultravijoličnim obsevanjem, infrardečim segrevanjem in umetnim dežjem smo v intervalih po 100 ciklov UPS na preizkušancih ugotavljali spremembo mase in vlažnosti, barve, dimenzij ter pojavnost napak. Največje spremembe mase, dimenzij in barve smo zaznali že po prvih 100 urah obremenjevanja. Pri preizkušancih A so bile spremembe absolutno večje kot pri skupinah B in C, ki se med sabo nista razlikovali. Prve razpoke in pokline so se pojavile na preizkušancih skupine A že po 100 urah, pri skupinah B in C pa po 200 do 300 urah. Zaključujemo, da so se znaki staranja pri površinsko oljenih in toplotno obdelanih talnih oblogah pokazali kasneje in manj izrazito kot pri kontrolnih preizkušancih skupine A.

Ključne besede

les;toplotna obdelava;staranje;talne obloge;

Podatki

Jezik:	Slovenski jezik
Leto izida:	2021
Tipologija:	2.11 - Diplomsko delo
Organizacija:	UL BF - Biotehniška fakulteta
Založnik:	[R. Lesjak]
UDK:	684.77
COBISS:	61467651
Št. ogledov:	285
Št. prenosov:	36
Ocena:	0 (0 glasov)
Metapodatki:

Ostali podatki

Sekundarni jezik:	Angleški jezik
Sekundarni naslov:	Ageing of heat-treated wood floorings
Sekundarni povzetek:	During the service life of wooden floors ageing occurs, thereby altering their relevant properties, which can, however, be evaluated in a short time under simulated conditions of intense climatic loading. For this purpose, three groups of external wooden floors were exposed to artificial accelerated aging (UPS): only heat-treated specimens were included in group A, and in groups B and C the same objects were additionally protected with natural oil. During the standard process of cyclic loading with ultraviolet irradiation, infrared heating, and artificial rain the change of mass and moisture content, colour, dimensions and incidence of defects were determined on the specimens at intervals of 100 UPS cycles. The largest changes in mass, dimensions and colour were detected after the first 100 hours of loading. The changes in the A-specimens were absolutely greater than in groups B and C, which did not differ from each other. The first end cracks and surface cracks occurred in group A after 100 hours, and in groups B and C after 200 to 300 hours. We conclude that the signs of ageing in surface-oiled and heat-treated floorings were later and less pronounced than at the control A-specimens.
Sekundarne ključne besede:	wood;heat treatment;ageing;wooden floor;
Vrsta dela (COBISS):	Diplomsko delo/naloga
Komentar na gradivo:	Univ. v Ljubljani, Biotehniška fak., Oddelek za lesarstvo
Strani:	VII, 30 f.
ID:	12863807