Some Experiences with Stake Tests at BAM Test Fields and in the BAM Fungus Cellar Part 2: Comparison of Static and Dynamic Moduli of Elasticity (MOE)

IRG/WP 05-20320

M Grinda, S Göller

In routine in-ground stake tests of wood preservatives at the BAM test field Horstwalde and in the BAM fungus cellar periodical determinations of both static moduli of elasticity (MOE) on the basis of bending tests and dynamic MOE on the basis of the vibration method were performed as a possible method for the assessment of fungal attack. As expected from other publications, the absolute values of the dynamic MOE were higher than those of the static MOE. With the equation used for the calculation of the dynamic MOE, the differences were greater with larger specimen sizes. Sufficient correlation was observed, regarding the course of both MOE types within the test period. For both types of MOE, wood moisture contents of the stakes above the fibre saturation point were a prerequisite for the comparability of results in succeeding determinations.

Keywords: Wood preservatives, in-ground tests, EN 252, field tests, fungus cellar, static MOE, dynamic MOE, wood moisture content

Conference: 05-04-24/28 Bangalore, India

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