Based on the principles of different previously reported experimental procedures dealing with laboratory soft rot testing, a study was conducted on treated poplar and beech. Preservatives used were CCA, CCF, AAC, Azaconazole and TCMTB. Treated samples were exposed for three months in a vermiculite substrate to Chaetomium globosum. Evaluation was based on absolute mass loss, percentage weight loss and residual modulus of elasticity , as well. Data obtained from the non-destructive strength testing showed good correlation with the weight loss figures. The methodology proved to be practical and reproducible.

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