Determination of the bond strength of treated wood strands embedded in a  cement matrix by means of a  pull-out test

Stephan Frybort (1) , Raimund Mauritz (2) , Alfred Teischinger (3) , Ulrich Müller (1)

1 Wood K plus
2 Doka Industrie GmbH
3 Department of Material Sciences and Process Engineering

Effects 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.

Mots clés: Physical Sciences

Stephan Frybort, Raimund Mauritz, Alfred Teischinger, Ulrich Müller. Determination of the bond strength of treated wood strands embedded in a  cement matrix by means of a  pull-out test. European Journal of Wood and Wood Products, 2009, 68 (4), pp.407-414. ⟨10.1007/s00107-009-0383-4⟩. ⟨hal-00568258⟩