DBIO-PROTECTION OF TIMBER FOR SUSTAINABLE DEVELOPMENT

Octavia ZELENIUC
Lecturer dr.ing.- Universitatea "Transilvania" din Brasov- Facultatea de Industria Lemnulu
Address: B-dul Eroilor nr.29, 500036 Brasov, Romania
Tel/Fax: 0040 268 415315. E-mail: zoctavia@unitbv.ro

Abstract: "Sustainability" is not only about quantity, but also about quality of the wood resources and sawn timber obtained. Timber in the yard is susceptible to mould, blue stain and decay. Bio-protection of timber right after cutting should be an important task for each sawmill which is interested in producing high quality products and in avoiding losses. Improper grading, storage in inadequate conditions without appropriate treatment lead finally to yearly losses of about 7.35 million euro only for beech timber from total timber production.

The paper presents the advantages of bio-protection treatments in the yard, the assessment procedure and the efficacy of different products compared to untreated control samples.

The laboratory tests are not always conclusive concerning the products behavior. Field test are necessary to promote efficient products on the market. Research made on different products, emphasized that the products P1 and P2 maintained their good performance (more evident at high concentrations) in time. After 3 months of outdoor exposure these products have rated below 0.5, for both species (spruce and beech) compared to control samples rated with 3.5. Sticker stacking of steamed beech samples led to an increase of the treatment efficacy, the rating obtained being below 0.4 whilst compact-stacked steamed samples reached the rating 2, after 2 months.

Key words: timber, protection, mould, blue stain, efficacy, sustainability.

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