Počet záznamů: 1

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

  1. 1.
    0348291 - UTAM-F 2011 RIV SK eng J - Článek v odborném periodiku
    Kloiber, Michal - Frankl, Jiří - Drdácký, Miloš - Kučerová, I. - Tippner, J. - Bryscejn, Jan
    Change of mechanical properties of Norway Spruce wood due to degradation caused by fire retardants.
    Wood Research. Roč. 55, č. 4 (2010), s. 23-38 ISSN 1336-4561
    Grant ostatní: GAČR(CZ) GA103/07/1091
    Program: GA
    Výzkumný záměr: CEZ:AV0Z20710524
    Klíčová slova: wood degradation * fire retardant * mechanical properties * tensile strength * hardness
    Kód oboru RIV: JN - Stavebnictví
    Impakt faktor: 0.284, rok: 2010

    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.
    Trvalý link: http://hdl.handle.net/11104/0188859