Taşçıoğlu, CihatAkçay, ÇağlarYalçın, MesutŞahin, Halil İbrahim2020-05-012020-05-0120141336-4561https://hdl.handle.net/20.500.12684/5853AKCAY, Caglar/0000-0003-1246-3056WOS: 000337934300013The screw withdrawal resistances of three commercially available wood based composites (WBC), medium density fiberboard (MDF), particleboard (PB), and plywood (PW) were investigated after vacuum-impregnated with copper azole (CA) and chromated copper arsenate (CCA). Two different concentrations were used from both preservatives to obtained above-ground and ground contact retention levels. In addition to the untreated control specimens, a set of only water treated control specimens were utilized to differentiate effects of water (carrier) since both preservatives are water based. Screw withdrawal strengths of the treated boards were determined perpendicular to grain direction after fixation and conditioning periods. The experimental results show that post-treatment with water-only significantly reduced screw holding strength of MDF and PB tested in the study. The CA and CCA treatments, however, did not cause any further reductions rather than reductions resulted from water-only treatments. The post-treated plywood, on the other hand, seems to be unaffected by water, CA and CCA treatments at all retention levels tested exhibiting the same level of screw holding strength after the post-treatments. The reductions in screw withdrawal strength need to be taken into account when and if such WBC treated with water-based preservative chemicals.eninfo:eu-repo/semantics/closedAccessCopper azolechromated copper arsenatepost-treatmentscrew withdrawal strengthwood-based compositesArticle592343350WOS:000337934300013Q2Q4