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Porovnání klasických a současných povrchových úprav stavebně-truhlářských výrobků v exteriéru
Luňáček, Martin
This thesis compares the differences between the use of classical and contemporary treatment practices of woodwork surfaces in carpentry, focusing on wood products made of acacia, oak, and spruce. Ox blood and used automotive oil were used for classical surface treatment whereas water-soluable pigment paints were used for contemporary treatment practices; choices were based on various conditions, such as weather, wind, or cardinal directions. Changes of the surface conditions were monitored and form the basis of this thesis; experimental measurement of samples, which were exposed to exterior conditions for ten months, form the basis of research data. A set of samples which were kept under constant environmental conditions with no access to light were stored in a laboratory in order to provide a set of contrasting samples to samples exposed to exterior conditions.
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Odolnost povrchových úprav masivního dřeva akát v exteriéru vůči mechanickému namáhání
Buigl, Adam
This bachelor thesis focuses on different surface treatments of wood, particularly on its suitability for an outdoor children playground made of acacia wood. Emphasis is placed on changes in physical chemical and aesthetic characteristics of the surface treatment, depending on the duration of the wood being exposed to the external weather conditions such as insolation, humidity and temperature changes. Another examined factor that had an impact on the surface treatment was the dependence on the orientation to the cardinal points. The thesis is supported by laboratory measurements of the samples, which were exposed to a surface treatment and then had to face the external weather conditions for eight months, during which, four measurements were done. The measured values were compared to the reference sample.
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Povrchová úprava výrobku ze dřeva trvale umístěných v exteriéru
Lesák, Josef
In this work there is solved appropriate use surface finishing on wood products which were made from larch and acacia and were placed in the outdoor environment. There are compared three kinds of varnishes, namely water-soluble, synthetic and oil varnishes. Emphasis is put on changes in their aesthetic and physical - mechanical properties, depending on weather conditions, such as humidity, sunlight and temperature fluctuation. Then there is compared the extent of these changes depending on the orientation to the cardinal points. The work is supported by laboratory measurements on test samples laboratory measurement that have been exposed to weather conditions for a period of ten months outdoors. As opposed to these exposed samples were created reference samples that were throughout wrapped in black foil without air access.
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Vliv stanoviště na množství extraktivních látek dřeva akátu
Bachan, Tomáš
This thesis, which is performed as an experiment, deals with dependence of locations on the amount of extractive substances in the heartwood, sapwood and bark of acacia (Robinia pseudoacacia L.) across radius of the trunk. Thesis also aims to determine at what part of the trunk is situated most of extractive substances. Furthermore is evaluated, if the amount of extractive substances is depending on the height of the trunk, at altitudes from 0 m and 1.3 m from which the samples were taken. A final point is to compar according to the cardinal directions. In the theoretical part is described the issue of extractive substances and chemical composition of acacia. The second part presents the measured values from taked and extracted samples and their statistical evaluation.
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