Formation of density and porosity of pine wood in a tree trunk

Kantieva, Ekaterina; Snegireva, Svetlana; Platonov, Aleksey

doi:10.1088/1755-1315/875/1/012016

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…In [9], it was noted that the raw materials have different quality requirements depending on the material or wood product. However, the physical and mechanical properties of wood are heterogeneous in radius and height of the trunk and depend on the breed, location in the trunk, and growing conditions.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

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Establishing regularities in the application of dry pine wood

Tsapko

Buiskykh

Likhnyovskyi³

et al. 2022

EEJET

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The issue related to using dry wood products for building structures is to ensure their stability and durability during operation while it is necessary to take into consideration changes in their properties and structure. Therefore, the object of this study was pine wood struck by drying out. It is proved that in the process of drying, wood porosity decreases, and, accordingly, the tensile strength, depending on the degree of damage by the fungus. Specifically, with the area of damage in the range of 30‒50 %, the strength limit decreases by more than 1.3 times, and if the fungus affects the area within 80÷100 %, the wood becomes softer, more ductile while the strength limit is reduced by 1.1 times. Based on the results of physicochemical studies, discrepancies in the IR spectra were identified, indicating structural changes in the constituent components of wood. There is a decrease or absence of intensities of absorption bands of some functional groups and the appearance or intensification of others. Wood samples, in determining the highest calorific value, show a difference in values, which is explained by structural changes in wood components caused by biological processes. Thermogravimetric analysis data indicate complete burnout of dry pine wood. However, for wood with tree stands not weakened by drying, the coke residue burns out at a higher temperature. Wood with blue pigmentation affected by microorganisms has significant differences in the heating area of 400÷700 °C. The nature of coke burnout allows us to make assumptions about the different qualitative and quantitative composition of the coke residue, which is formed due to structural changes. The practical significance is the fact that the results of determining the properties and structure of dry wood make it possible to establish the operating conditions for articles and building structures

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Thus, our review of scientific literature [4,6,[8][9][10] has established that the drying of the wood changes the structure and properties of wood, including physicochemical ones. All this gives grounds for conducting a study into determining the parameters that ensure the use of such wood.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Establishing regularities in the application of dry pine wood

Tsapko

Buiskykh

Likhnyovskyi³

et al. 2022

EEJET

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“…The basic density of infected wood was much greater than that of healthy wood. The latter was lower than the values reported in the literature for mid-stem height, amounting to 415 ± 55 kgm −3 [21], 417.15±3.54 kgm −3 [27], and 419 kmm −3 [23]. Infected wood exhibited a higher proportion of wood substance and lower porosity, with the opposite being true of healthy wood.…”

Section: Discussionmentioning

confidence: 61%

“…These criteria are met by the Scots pine, which is one the most important tree species in the world. It has been primarily studied in terms of its structure [12,13] and physical properties [14][15][16][17][18][19][20][21] (and especially density [13,[22][23][24][25][26][27][28]) as well as mechanical properties [29][30][31][32][33].…”

Section: Introductionmentioning

confidence: 99%

The Structural, Physical, and Mechanical Properties of Wood from Scots Pine (Pinus sylvestris L.) Affected by Scots Pine Blister Rust

Kulak,

Lachowicz,

Moskalik

et al. 2023

Forests

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The objective of this work was to examine the effects of Scots pine blister rust on the quality of Scots pine wood. The research material was taken from tree parts with visible symptoms of fungal infection as well as from unaffected tree parts. Our results show that the effects of the fungus Cronartium pini (Willd.) Jørst. are local and do not prevent the use of wood, and especially its unaffected fragments. Statistical analysis was used to describe the ways in which the pathogen altered wood. While the fungus statistically increased wood density, it significantly diminished its strength parameters. The structural properties of infected and healthy wood from affected trees were found to be similar and much higher than the average values for Scots pine. The higher transverse parameters of wood fibers had a beneficial effect on morphological properties. Scots pine blister rust significantly decreased wood homogeneity, which, together with stem deformation, lowered the quality of timber and reduced its yield.

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“…High temperature during a fire has a destructive effect on the structure of wood. This type of cell wall destruction can be explained by the fact that under the influence of high temperatures, free moisture in the tube cavities boiled off, and that, in turn, led to an increase in the excess pressure of the vaporair mixture, which contributed to the destruction of (4) 100%, m P V = ±  the cell walls in the groups of tubes (Kantieva et al, 2021;Scandelli et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

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2022

AEJ

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Introduction: Heritage conservation attracts wide attention worldwide. Jordan has many heritage buildings that were preserved, rehabilitated, and adapted to new functions. However, these conservation efforts could not solve the energy consumption problem or maintain the economic and financial balance, thus reducing building efficiency, slowing down the conservation activity, and forcing us to consider new solutions, especially since Jordan has limited energy sources. Integrating smart technologies in historical buildings is widely effective in achieving the sustainability of their historical, symbolic architectural values. Purpose of the study: We aimed to explore the potential integration of smart technologies in cultural and heritage buildings. Methods: We suggested an alternative solution -adopting the smart building concept in the Abu Jaber Museum in Al-Salt (which recently got on the UNESCO World Heritage List since it has more than 1000 heritage buildings), using an automated lighting control system. Approach: We deployed the qualitative method and case study approach to investigate the potential of adopting the smart building concept in the historical building in Al-Salt, Jordan. The study sheds light on the possibilities of utilizing smart technologies in historical buildings in Al-Salt.The findings indicate that smart technologies can offer great opportunity in preserving the architectural heritage and raising the efficiency of heritage buildings. Novelty: The study provides a framework based mainly on automated lighting systems in historical buildings. For the first time, the focus was on historical buildings in Jordan and their performance.

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Formation of density and porosity of pine wood in a tree trunk

Cited by 7 publications

References 4 publications

Establishing regularities in the application of dry pine wood

Establishing regularities in the application of dry pine wood

The Structural, Physical, and Mechanical Properties of Wood from Scots Pine (Pinus sylvestris L.) Affected by Scots Pine Blister Rust

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