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Inverkan av skruvars installation på fuktinträngning i trä

Arnebrant, Erik LU (2023) In LUTVDG/TVBK/23/5293 VBKL01 20201
Construction Management
Abstract
Wood and wood-based materials are common materials used in buildings, both in- and outdoors. However, wood is vulnerable to water and moisture which is why it is essential to keep it dry and prevent moisture from getting into the wood. Thus, there are multiple methods to protect the wood against moisture, such as using paint, oil, impregnation, or different metal profiles. Fasteners penetrating wood can act as a passage for water to be absorbed deeper into the material and increase the moisture content which results in decreased durability and reduced mechanical properties. This report investigated if differences in the installation depth of screws and the moisture content of the penetrated wood correlate. It was executed by measuring... (More)
Wood and wood-based materials are common materials used in buildings, both in- and outdoors. However, wood is vulnerable to water and moisture which is why it is essential to keep it dry and prevent moisture from getting into the wood. Thus, there are multiple methods to protect the wood against moisture, such as using paint, oil, impregnation, or different metal profiles. Fasteners penetrating wood can act as a passage for water to be absorbed deeper into the material and increase the moisture content which results in decreased durability and reduced mechanical properties. This report investigated if differences in the installation depth of screws and the moisture content of the penetrated wood correlate. It was executed by measuring moisture content continuously on 48 small samples made of spruce that had been placed on a roof where the samples were exposed to the weather for two years. These specimens had one screw each which was installed in three different ways, either with the screw head being above, flush, or below the wooden surface. The results were then analyzed and compared with precipitation to find patterns. The results were scattered and inconclusive which made it difficult to draw a conclusion. Even though the results were inconclusive, some results made it clear that poor installation led to an increase in moisture content. The scattered results could be due to variations in the wood, practical problems with the sensors, or a limited testing period. Thus, more testing is needed with more samples. (Less)
Please use this url to cite or link to this publication:
author
Arnebrant, Erik LU
supervisor
organization
alternative title
Impact of Screws Installation on Moisture Penetration in Wood
course
VBKL01 20201
year
type
M2 - Bachelor Degree
subject
keywords
Moisture Content, Wood, Timber, Screws, Installation
publication/series
LUTVDG/TVBK/23/5293
report number
5293
ISSN
0349-4969
language
Swedish
additional info
Handledare: Jonas Niklewski
Examinator: Ewa Frûhwald Hansson
id
9112106
date added to LUP
2023-04-20 12:01:12
date last changed
2023-04-20 12:01:12
@misc{9112106,
  abstract     = {{Wood and wood-based materials are common materials used in buildings, both in- and outdoors. However, wood is vulnerable to water and moisture which is why it is essential to keep it dry and prevent moisture from getting into the wood. Thus, there are multiple methods to protect the wood against moisture, such as using paint, oil, impregnation, or different metal profiles. Fasteners penetrating wood can act as a passage for water to be absorbed deeper into the material and increase the moisture content which results in decreased durability and reduced mechanical properties. This report investigated if differences in the installation depth of screws and the moisture content of the penetrated wood correlate. It was executed by measuring moisture content continuously on 48 small samples made of spruce that had been placed on a roof where the samples were exposed to the weather for two years. These specimens had one screw each which was installed in three different ways, either with the screw head being above, flush, or below the wooden surface. The results were then analyzed and compared with precipitation to find patterns. The results were scattered and inconclusive which made it difficult to draw a conclusion. Even though the results were inconclusive, some results made it clear that poor installation led to an increase in moisture content. The scattered results could be due to variations in the wood, practical problems with the sensors, or a limited testing period. Thus, more testing is needed with more samples.}},
  author       = {{Arnebrant, Erik}},
  issn         = {{0349-4969}},
  language     = {{swe}},
  note         = {{Student Paper}},
  series       = {{LUTVDG/TVBK/23/5293}},
  title        = {{Inverkan av skruvars installation på fuktinträngning i trä}},
  year         = {{2023}},
}