Počet záznamov: 1
Assessment of the flamgard retardant efficciency during the thermal loading of spruce wood
SYS 0108261 LBL 00000naa^^22^^^^^^^^450 005 20201106134009.7 017 70
$a 10.17423/afx.2020.62.2.07 $2 DOI 100 $a 20201106a m y0sloy0103 ba 101 0-
$a eng 102 $a SK 200 1-
$a Assessment of the flamgard retardant efficciency during the thermal loading of spruce wood $f Iveta Čabalová ...[et al.] 215 $c Obr., tab. 320 $a Lit. 330 $a The aim of the paper was to determine the resistance of spruce wood (Picea abiesL.) treated with a flame retardant Flamgard after exposure of its surface to radiant heat. Treated samples were thermally loaded for 30 and 45 minutes and untreated sample were loaded for 30minutes. The changes in the chemical composition of wood (extractives, lignin, cellulose and hemicelluloses content) in two layers which were removed below the charred layer (layer 1-thickness up to 20 mm and layer 2-thickness from 20 to 40 mm) and thickness of the charred layer were evaluated. During the thermal loading of a control sample, the temperature of 300°C in time of 920 seconds was observed.The average thickness of charred layer was 15.41 mm.The limit temperature of 300°C was not reached by both treated samples loaded for 30 and 45 minutes. The average thickness of charred layer of the treated samples was 10.03 mm (30 min.) and 20.04 mm(45 min.).The major chemical changes were recorded in the wood sample untreated with a retardant, mainly in the layer 1 (decrease inlign in by 12.26% and holocellulose content by 16.87%). The experiment showed that the retardant used reduced considerably the degradation of material in terms of changes in its chemical composition. There were no big changes of both lignin and holocellulose content during the thermal loading of the treated samples (decrease inlignin from 1.89 to 6.46% and holocellulose amount from 0 to 4.14%). The experiments also confirmed that the least thermally stable components of wood, namely hemicelluloses, were degraded to the greatest extent, most in the layer 1 of the control sample (decrease in20.25%). 463 -1
$1 001 sldk_un_cat*0108049 $1 011 $a 1336-3824 $1 200 1 $a Acta Facultatis Xylologiae Zvolen $e vedecký časopis Drevárskej fakulty $v Vol. 62, no. 2 (2020), s. 75-87 $1 210 $a Zvolen $c Technická univerzita vo Zvolene $d 2020 610 1-
$9 sldk_un_auth*h005962 $a smrekové drevo $X spruce wood 610 1-
$9 sldk_un_auth*h013392 $a retardéry horenia $X retarders of burning 610 1-
$9 sldk_un_auth*0010447 $a termická degradácia dreva $X thermal degradation of wood 610 1-
$9 sldk_un_auth*h008758 $a celulóza $X cellulose 610 1-
$9 sldk_un_auth*h013484 $a hemicelulózy $X hemicelluloses 610 1-
$9 sldk_un_auth*h007595 $a lignín $X lignin 675 $a 674.032.475.5 $v 2. stred. $z slo 675 $a 630*843 $v 1. stred. $z slo 675 $a 630*812.14 $v 2.stred $z slo 675 $a 547.458.81 $v 1. stred. $z slo 675 $a 547.458.87 $v 1. stred. $z slo 675 $a 630*864.4 $v 1. stred. $z slo 701 -1
$3 sldk_un_auth*p0051819 $a Čabalová $b Iveta $f 1979- $p TUZDFCHTD $4 070 $T Katedra chémie a chemických technológií 701 -1
$3 sldk_un_auth*p0050468 $a Zachar $b Martin $f 1981- $p TUZDFPO $4 070 $T Katedra protipožiarnej ochrany 701 -1
$3 sldk_un_auth*0049636 $a Bélik $b Michal $f 1997- $4 070 701 -1
$3 sldk_un_auth*0050594 $a Majerská $b Kristína $4 070 801 -0
$a SK $b ZV001 $c 20201106 $g AACR2 856 4-
$u https://df.tuzvo.sk/sites/default/files/07-02-20_0.pdf
Počet záznamov: 1