Eldar pine tree is one of the species that planted in city parks, garden and forests region of Tehran and another city of Iran. In this study, three trees from species of planted eldar pine tree were randomly cut down in planted forest region of Tehran city. Then from each tree were separated three disks. At first wood flour and then extractive measured by TAPPI standards. The results showed that the average of extractives in wood and bark of planted eldar pine tree were 3.6 and 17 percent respectively. Then wood flour was washed by acetone and extractives residue was added BSTFA reactor and samples kept in Ben Marry Bath in 70oC for an hour, and they were analyzed by GC/MS. For the Identification of compounds were used GC diagram which shows abundance and retention time of each compound, and calculation of quartz index and Adams table. So that, Specified 56 compounds in wood and 43 compounds were in bark of planted eldar pine tree. That 1 - Phenanthrenecarboxylic acid, Rosin acids, Gama-Sitosterol, 9-Octadecanoic acid, n-Hexadecanoic acid, Octadecanoic acid, 9, 12 - Octadecanoic acid, Dodecan, Tetradecan, Styrene and Hexadecan were as 11 common compounds in wood and bark of planted eldar pine tree so much and these compounds are very important in durability and consumption its

The paper presents the application of waste materials resulted in the furniture manufacturing process as components for wood-plastic composites. The composites are produced from industrial byproducts, such as shavings and ABS (acrylonitrile butadiene styrene), without coupling agent. The two components are derived from industrial processes of furniture manufacturing: the first one consists of wood residues resulted from planing machine as planer shavings, and the second one from ABS edge banding operation. A wide array of mixtures varying from 100% ABS to 50% ABS: 50% shavings were used to produce eight variants of boards. Density was determined for each board and the method for the determination of ABS particle size distribution by oscillating screen method using sieve apertures up to 4mm was also applied, in order to establish the particle fractions and the distribution of their sizes. Based on ABS properties, several technologies of manufacturing wood-plastic composites from the waste materials were tested and one of them was selected. The results of the first stage analysis, when the physical integrity and the compactness of the panels’ structures were tested, have shown that a maximum proportion of 30% of wood shavings is accepted in the mixture. On the other hand, the low density of the boards and their porous structure recommend further investigations for thermal and sound insulation applications

The influence of three pre-treatment methods on the hydration characteristics of Portland cement in combination with three tropical hardwood species was investigated. The maximum hydration temperature and time to reach maximum hydration temperature were analysed for the wood-cement-water mixtures of the three species after removing inhibitory extractives of wood samples by extraction with 5% Sodium hydroxide (NaOH), cold and hot water after removing inhibitory extractives of wood samples. There were differences in the hydration reaction of the wood species with Portland cement using the different pre-treatment methods. The compatibility of the wood species with Portland cement improved following pre-treatment. Sodium hydroxide pre-treatment had the most significant effect followed by hot water. Terminalia ivorensis (Idigbo), and Antiaris africana (Oriro) species showed considerable improvement in their compatibility with Portland cement at 5% Sodium hydroxide pre-treatment with maximum hydration temperature of 65oC where Arere had 60.5oC where both cold and hot water were unable to raise the hydration temperature beyond 55.5oC . This study shows that the wood species requires more than cold and hot water extraction to make them suitable for wood cement composite materials as extraction with sodium hydroxide (1% solution) was found to be the most effective treatment for the wood species under investigation

This article presents the use of system analysis methodology and Graph Theory for validation of the relationships among descriptive factors, which impact the selection of oil materials for wood finishing. Matrix analysis was used to determine the results of the pair wise comparisons of factor weights and optimization of the factor values. Modelling theories have been developed, which allow for construction of models of primary impacts of the factors on oil materials selection in protective and decorative wood coatings creation

The present paper proposes a new approach and provides the possibility to ensure a proper systemic functioning of wood industry, opening opportunities for safe and sustainable development. It starts from the idea that development supposes rapidly, correctly and efficiently solving the “demands” of the wood-processing sector, by means of rapid access to the “offer” banks within various elements of the overall development system and by means of an appropriate information transfer for application. Streamlining the connections to be achieved between demands and offers supposes finding systemic solutions to facilitate the relieving of the specific wood-processing management by the stages of searching the partners who should solve the efficient operation and development. An applicable solution is the implementation and development of the commissionership system, which should make the connections between operators and the possible partners who might comply with their demands

This paper aims to apply a thermal treatment of beech and spruce sawdust dried to 10% moisture in order to determine the mass loss and to obtain pellet sets. This paper considers the colour change of the treated material during the treatment, as function of time and temperature increase. It also highlights the changes in the chemical composition of sawdust connected with the mass loss. The paper also studies the physical integrity of the obtained pellets, using the method of free fall, with the results showing that spruce sawdust pellets appear to be more stable. The optimal temperature of thermal treatment proves to be 2600C and the duration of treatments are 5 and 10 minutes, when the sawdust has dimensions between 0.4-1mm. Regarding the pellets formed at the temperature above 2600C, it should be noted that their stability is low, in particular that one of beech, which is difficult to compress and compact