Effect of One-Sided Surface Charring of Beech Wood on Density Profile and Surface Wettability

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F21%3APU140826" target="_blank" >RIV/00216305:26110/21:PU140826 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378297:_____/21:00542187 RIV/62156489:43410/21:43919865

Výsledek na webu

<a href="https://www.mdpi.com/2076-3417/11/9/4086" target="_blank" >https://www.mdpi.com/2076-3417/11/9/4086</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/app11094086" target="_blank" >10.3390/app11094086</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of One-Sided Surface Charring of Beech Wood on Density Profile and Surface Wettability

Popis výsledku v původním jazyce

One-sided surface charred European beech wood (Fagus sylvatica L.) was studied. Radial and tangential specimens of dimensions of 50 x 25 x 350 mm were one-sided surface charred at 200, 250, 300, 350, and 400 degrees C for various times using a contact heating system. Specimens of dimensions of 50 x 25 x 50 mm(3) were prepared for treatment intensity analysis and its effect on surface wettability. Density profiles of the radial and tangential charred specimens were determined using X-ray densitography with a resolution of 0.05 mm. The wettability of the one-sided surface charred wood specimens was analyzed via contact angle, measured using the sessile drop method and determined over 10 to 150 s. The oven-dried specimens were partially submerged in water and water uptake was recorded after 2, 4, 6, 8, 10, 48, and 72 h according to EN-927-5. The surface density of the radial specimen groups charred at 200 degrees C for 6 min and 250 degrees C for 4 min decreased by about 4.5 to 8.2%. With increasingly severe charring, the surface density decreased by about 15.5 to 33.5%. A mild charring process produced a surface charred layer of approx. 2 mm, while higher temperatures and longer times affected the density up to 4-6 mm beneath the surface. Differences were found between the water uptake of the radial and tangential charred beech specimens. The most significant decrease of 56% in water uptake was recorded for the radial group prepared at 200 degrees C for 20 min after floating in water for 72 h. Water uptake in the radial groups modified at 250 degrees C for 4 and 6 min after 72 h decreased by 38% and 36%, respectively. The tangential groups did not show any statistically significant decrease. The average water uptake of the groups charred at 200 degrees C for 20 min, 350 degrees C for 2 min and 400 degrees C for 1 min was greater than that of the reference; the variability of the measured data was significantly greater due to the highly anisotropic character of the tan

Název v anglickém jazyce

Effect of One-Sided Surface Charring of Beech Wood on Density Profile and Surface Wettability

Popis výsledku anglicky

One-sided surface charred European beech wood (Fagus sylvatica L.) was studied. Radial and tangential specimens of dimensions of 50 x 25 x 350 mm were one-sided surface charred at 200, 250, 300, 350, and 400 degrees C for various times using a contact heating system. Specimens of dimensions of 50 x 25 x 50 mm(3) were prepared for treatment intensity analysis and its effect on surface wettability. Density profiles of the radial and tangential charred specimens were determined using X-ray densitography with a resolution of 0.05 mm. The wettability of the one-sided surface charred wood specimens was analyzed via contact angle, measured using the sessile drop method and determined over 10 to 150 s. The oven-dried specimens were partially submerged in water and water uptake was recorded after 2, 4, 6, 8, 10, 48, and 72 h according to EN-927-5. The surface density of the radial specimen groups charred at 200 degrees C for 6 min and 250 degrees C for 4 min decreased by about 4.5 to 8.2%. With increasingly severe charring, the surface density decreased by about 15.5 to 33.5%. A mild charring process produced a surface charred layer of approx. 2 mm, while higher temperatures and longer times affected the density up to 4-6 mm beneath the surface. Differences were found between the water uptake of the radial and tangential charred beech specimens. The most significant decrease of 56% in water uptake was recorded for the radial group prepared at 200 degrees C for 20 min after floating in water for 72 h. Water uptake in the radial groups modified at 250 degrees C for 4 and 6 min after 72 h decreased by 38% and 36%, respectively. The tangential groups did not show any statistically significant decrease. The average water uptake of the groups charred at 200 degrees C for 20 min, 350 degrees C for 2 min and 400 degrees C for 1 min was greater than that of the reference; the variability of the measured data was significantly greater due to the highly anisotropic character of the tan

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/TJ02000072" target="_blank" >TJ02000072: Vývoj technologie karbonizace povrchu dřevěných prvků staveb: eliminace vlhkostních a biodegradačních vlivů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Applied Sciences - Basel

ISSN

2076-3417

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

1-10

Kód UT WoS článku

000649897500001

EID výsledku v databázi Scopus

—