Diffusion of bifluorides and borates from preservative rods in laminated beams

IRG/WP 3644

H Militz

Laminated beams from spruce, pine and larch were treated with two preservative rods, based on bifluorides and octaborate respectively. After 3 and 6 months placed in different climates (65% r.h., 100% r.h., water) the diffusion of the active ingredient was measured. After the 6 months period, the diffusion of the bifluorides was, in all species, ca. 5 times larger than the diffusion from octaborate rods. The bifluorides were not hindered by the glue-lines. The diffusion of the borate was poor, mainly perpendicular to the grain and was hindered by the glue-line.


Keywords: BIFLUORIDES; BORON RODS; DIFFUSION; DISODIUM OCTABORATE; HYDROGEN FLUORIDE; LAMINATED BEAMS; TIMBOR; WOODCAP; WOODPILL

Conference: 91-05-20/24 Kyoto, Japan


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