Testing the durability of timber products above ground using the block-test method – A critical review

IRG/WP 18-20637

C Brischke, A Gellerich, H Militz

The block-test method for testing the durability of wood and wood products above ground is reviewed critically with respect to practical aspects, moisture loads, corresponding decay development, and the possibilities of assessing test specimens by determining the dynamic modulus of elasticity (MOEdyn) of wood. In total, 36 blocks representing different modifications of the original set-up and a wide range of tested materials has been evaluated. Rates of decay and MOEdyn loss were compared and assessed regarding their feasibility for durability classification. Benefits and shortcomings of the block-test method are discussed.

Keywords: above-ground field tests, durability, dynamic MOE, use class 3

Conference: 18-04-29/05-03 Johannesburg, South Africa

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