Investigations of the treatability of various commercially significant Turkish timbers

IRG/WP 370 E

R Ilhan

Timbers which naturally deteriorate quickly can only be used commercially when their life is increased by the use of chemical treatments. The treatment of the timber can only be planned on a regular basis when the treatability of the wood is known. The purpose of the experiments was therefore to determine to what extent the various types of wood could be sufficiently impregnated. The question of the resistant to treatment of Turkish timbers arose in the context of the currently running program of development in Turkey, in order to be able to judge their usefulness more accurately. The experiments were carried out on small test pieces of sapwood and inner and outer heartwood; and on poles and sleepers of the following species of wood: Abies bornmülleriana Mattf. (Bornmueller fir); Picea orientalis L. Carr. (Oriental spruce); Pinus sylvestris L. (Scots pine); Pinus nigra var. pallasiana (Austrian pine); Fagus orientalis L. (Turkish beech); Quercus dschorochensis K. Koch (Dschorochensis oak). The species of wood mentioned were chosen as experimental material; coal tar creosote and an aqueous solution of Wolmanit-CB were chosen as preservatives, and the techniques used were the vacuum/pressure method and a newly developed method of replacing the sap under atmospheric pressure. The technique of impregnation was such that the results are relevant to a great extent to practical situations. The analysis of the extensive data was carried out by electronic computer. The analysis used the following statistical methods: Anaylsis of variance - Correlation - Simple linear regression with graphical representation of the regression line - Multiple linear regression. The experiments were an attempt to evaluate the treatability of the various species of wood by a statistical analysis of the amount of preservative taken up and its depth of penetration. In this work a series of correlations between the amount of preservative taken up and the depth of penetration, and their dependence on the properties (of the wood) are explained.


Keywords: ABSORPTION; BOUCHERIE; CCB; WOLMANIT C; PENETRATION; POLES; SLEEPERS; SPECIFIC GRAVITY; TREATABILITY ;TIMBERS; TURKEY; ABIES BORNMUELLERIANA; PICEA ORIENTALIS; PINUS SYLVESTRIS; PINUS NIGRA PALLASIANA; FAGUS ORIENTALIS; QUERCUS DSCHOROCHENSIS

Conference: 76-05-12/15 Wildhaus, Switzerland


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