Open AccessDetermination of the bond strength of treated wood strands embedded in a cement matrix by means of a pull-out test
Author(s) -
Stephan Frömel-Frybort,
Raimund Mauritz,
Alfred Teischinger,
Ulrich Müller
Publication year - 2009
Publication title -
european journal of wood and wood products
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.488
H-Index - 60
eISSN - 1436-736X
pISSN - 0018-3768
DOI - 10.1007/s00107-009-0383-4
Subject(s) - materials science , bond strength , composite material , bonding strength , sodium silicate , swelling , cement , sodium hydroxide , moisture , matrix (chemical analysis) , softwood , water content , picea abies , chemistry , adhesive , layer (electronics) , geotechnical engineering , biology , engineering , botany
International audienceEffects of chemical treatment of wood on the bonding strength of Norway spruce strands ( Karst.) embedded in a cement matrix were investigated by means of a pull-out test. Strands of varying thickness were used whereas a strong influence of thickness on bonding strength could be observed. Using thick strands (800 μm) showed negative effect on bonding strength which is due to the swelling effect. The treatment of thin strands (400 μm) showed that using wet strands (∼ 90% moisture content) leads to the best results compared to untreated dry (12%) strands. By addition of setting accelerators (ammonium chloride) bonding strength of wet strands was even improved. Furthermore, effects of hot water and sodium hydroxide extraction as well as sodium silicate treatment were examined
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