Some Experiences with Stake Tests at BAM Test Fields and in the BAM Fungus Cellar
Part 1: Comparison of Results of Visual Assessments and Determinations of Static Moduli of Elasticity (MOE)
M Grinda, S Göller
With examples of routine in-ground stake tests differences are shown in the performance of wood preservatives at the BAM test fields Lehre and Horstwalde and in the BAM fungus cellar. Signs of attack of micro-organisms were assessed visually according to EN 252. Periodical determinations of static moduli of elasticity (MOE) revealed the influence of the attack on the elastic properties of the wood specimens. The course of visible signs of attack and the residual MOE corresponded sufficiently in the fungus cellar. At comparable decrease rates of the MOE the visible signs of fungal attack developed slower at the test fields than in the fungus cellar. The stake dimensions distinctly influenced the accelerating effect of the fungus cellar.
Keywords: Wood preservatives, in-ground tests, EN 252, field tests, fungus cellar, visual assessment, static MOE, accelerated testing