A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Paprastosios eglės (Picea abies (L.) Karst.) vidinio puvinio įtaka medienos savybėms ; Norway spruce internal root influence to the wood properties
In this master thesis was researched internal rot of Norway spruce (Picea abies) and its impact to woods characteristics. The object of this work: wood of Norway spruce (Picea abies), which was taken from Prienai state-owned forest enterprise (therefore SOFE) 15 quarter 25 plot, 49 quarter 15plot,Veisiejai SOFE 3 quarter 7 plot, Šilutė SOFE 2quarter 7plot, 11 quarter 12plot, 19 quarter 6 plot, 33 quarter 3plot, 147 quarter 4 plot. The aim of this work is to research the inner rot influence of picea abies to wood density and strength properties. The methods: all spruce in research area were checked with device called “ARBOTROM”, which measures sound speed in wood and shows spatial sound speed view in a steam. Sound in healthy and rot wood differs. Randomly were selected and cut down all trees, which according to the device had an inner rot. After the rot was found a 50cm length tree stump sample was taken for the further research. During preparation of samples there was prepared the central 60 mm thick cutoff (lengthways the core) and shredded to layers. Physical and mechanical wood properties were defined in LRCAF Forest Institute for timber laboratory and in “Nemunas” valley, timber quality and technology lab. For a wood strength property testing was used 5 ton test machine P-5. All data was systematized and analyzed by using Microsoft Excel. Results: after researching Norway spruce kernel rot effect to wood density, was discovered, that wood samples with inner rot from Prienai SOFE had lower density in two, closest to the core, layer had a lower then average density. After analysis of wood’s strength data that was recorded after bending across fiber and collected from three SPFE was discovered, that in a rudimentary rot phase has no impact for a wood strength. The strength of wood decrease in a process of rot development, but it has no impact for an undamaged wood. During research was discovered, that the properties of healthy and rotten wood radically differ by static bending and by compression across the fiber.
Paprastosios eglės (Picea abies (L.) Karst.) vidinio puvinio įtaka medienos savybėms ; Norway spruce internal root influence to the wood properties
In this master thesis was researched internal rot of Norway spruce (Picea abies) and its impact to woods characteristics. The object of this work: wood of Norway spruce (Picea abies), which was taken from Prienai state-owned forest enterprise (therefore SOFE) 15 quarter 25 plot, 49 quarter 15plot,Veisiejai SOFE 3 quarter 7 plot, Šilutė SOFE 2quarter 7plot, 11 quarter 12plot, 19 quarter 6 plot, 33 quarter 3plot, 147 quarter 4 plot. The aim of this work is to research the inner rot influence of picea abies to wood density and strength properties. The methods: all spruce in research area were checked with device called “ARBOTROM”, which measures sound speed in wood and shows spatial sound speed view in a steam. Sound in healthy and rot wood differs. Randomly were selected and cut down all trees, which according to the device had an inner rot. After the rot was found a 50cm length tree stump sample was taken for the further research. During preparation of samples there was prepared the central 60 mm thick cutoff (lengthways the core) and shredded to layers. Physical and mechanical wood properties were defined in LRCAF Forest Institute for timber laboratory and in “Nemunas” valley, timber quality and technology lab. For a wood strength property testing was used 5 ton test machine P-5. All data was systematized and analyzed by using Microsoft Excel. Results: after researching Norway spruce kernel rot effect to wood density, was discovered, that wood samples with inner rot from Prienai SOFE had lower density in two, closest to the core, layer had a lower then average density. After analysis of wood’s strength data that was recorded after bending across fiber and collected from three SPFE was discovered, that in a rudimentary rot phase has no impact for a wood strength. The strength of wood decrease in a process of rot development, but it has no impact for an undamaged wood. During research was discovered, that the properties of healthy and rotten wood radically differ by static bending and by compression across the fiber.
Paprastosios eglės (Picea abies (L.) Karst.) vidinio puvinio įtaka medienos savybėms ; Norway spruce internal root influence to the wood properties
Danielius, Marius (author) / Aleinikovas, Marius
2013-05-28
Theses
Electronic Resource
Lithuanian , English
DDC:
690
Density variations in spruce wood with indented rings (Picea abies Karst)
| British Library Online Contents | 2003