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

0348291 - ÚTAM 2011 RIV SK eng J - Journal Article
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 - others:GAČR(CZ) GA103/07/1091
Program: GA
Institutional research plan: CEZ:AV0Z20710524
Keywords : wood degradation * fire retardant * mechanical properties * tensile strength * hardness
Subject RIV: JN - Civil Engineering
Impact factor: 0.284, year: 2010
http://www.woodresearch.sk/wr/201004/03.pdf

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.
Permanent Link: http://hdl.handle.net/11104/0188859