Change of mechanical properties of Norway Spruce wood due to degradation caused by fire retardants

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F62156489%3A43410%2F10%3A00160677" target="_blank" >RIV/62156489:43410/10:00160677 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378297:_____/10:00348291

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Change of mechanical properties of Norway Spruce wood due to degradation caused by fire retardants

Popis výsledku v původním jazyce

The degradation of surface layers of wood can be caused by chemical reactions of compounds contained in fire retardants which were applied to historic wooden structures in the past. Among such chemicals are e.g. ammonium sulphate and ammonium phosphate.The paper presents the experimentally established mechanical properties measured on the surface of fibrillated wood of Norway Spruce (Picea abies (L.) Karst.), and their comparison with values measured on undamaged wood. The results proved a loss of cohesion in the damaged surface layer accompanied with a decrease in tensile strength by up to 50% when compared to the values ascertained in undamaged wood. The impact of corrosion was also studied using hardness tests based on ball and pin indentation. Electron microscopy investigation revealed both the damage to the middle lamella, which mainly consists of lignin, and the damage to the secondary cell wall primarily formed by cellulose. The increasing degree of fibrillation is accompanied

Název v anglickém jazyce

Change of mechanical properties of Norway Spruce wood due to degradation caused by fire retardants

Popis výsledku anglicky

The degradation of surface layers of wood can be caused by chemical reactions of compounds contained in fire retardants which were applied to historic wooden structures in the past. Among such chemicals are e.g. ammonium sulphate and ammonium phosphate.The paper presents the experimentally established mechanical properties measured on the surface of fibrillated wood of Norway Spruce (Picea abies (L.) Karst.), and their comparison with values measured on undamaged wood. The results proved a loss of cohesion in the damaged surface layer accompanied with a decrease in tensile strength by up to 50% when compared to the values ascertained in undamaged wood. The impact of corrosion was also studied using hardness tests based on ball and pin indentation. Electron microscopy investigation revealed both the damage to the middle lamella, which mainly consists of lignin, and the damage to the secondary cell wall primarily formed by cellulose. The increasing degree of fibrillation is accompanied

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JN - Stavebnictví

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

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

Název periodika

Wood research

ISSN

1336-4561

e-ISSN

—

Svazek periodika

55

Číslo periodika v rámci svazku

IV

Stát vydavatele periodika

SK - Slovenská republika

Počet stran výsledku

16

Strana od-do

—

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—