Treatment of European beech with a new wood fire retardant agent based on in situ deposition of calcium oxalate

Franke, Tom; Volkmer, Thomas (2019). Treatment of European beech with a new wood fire retardant agent based on in situ deposition of calcium oxalate Holzforschung, 73(11), pp. 1047-1050. De Gruyter 10.1515/hf-2019-0043

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European beech (Fagus sylvatica L.) was impregnated in a two-step process with aqueous solu-tions of potassium oxalate and calcium chloride succes-sively. These compounds are intended to react in situ to the water-insoluble salt calcium oxalate and the reaction by-product potassium chloride. In order to assess the treatability, the solid uptake after the first impregnation and after the treatment was examined. The fixation of the precipitated salts was measured in leaching tests accord-ing to the European standard EN 84. The reaction to fire of mineralized beech was tested following the standard ISO 11925-2. A weight percentage gain of appr. 35% indicates a sucessful treatment of the beech with the mineralization agents. The weight percentage gain after leaching indi-cates a sufficient fixation of calcium oxalate in the wood. Furthermore, results from flammability tests indicate improved fire resistance due to the mineralization.

Item Type:	Journal Article (Original Article)
Division/Institute:	School of Architecture, Wood and Civil Engineering School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology School of Architecture, Wood and Civil Engineering > Institute for Materials and Wood Technology > Wood Modification BFH Centres and strategic thematic fields > BFH Centre for Wood - Resource and Material
Name:	Franke, Tom and Volkmer, Thomas
Subjects:	Q Science > Q Science (General) Q Science > QD Chemistry T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) T Technology > TH Building construction T Technology > TP Chemical technology T Technology > TS Manufactures
ISSN:	1437-434X
Publisher:	De Gruyter
Language:	English
Submitter:	Christelle Ganne-Chédeville
Date Deposited:	26 Apr 2021 15:33
Last Modified:	04 Dec 2023 14:38
Publisher DOI:	10.1515/hf-2019-0043
Uncontrolled Keywords:	Mineralization Reaction to fire Wood modification
ARBOR DOI:	10.24451/arbor.14672
URI:	https://arbor.bfh.ch/id/eprint/14672