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Fuktegenskaper hos magnesiumoxidskivor

Talevska, Aleksandra and Fakhro, Omar (2016)
LTH School of Engineering in Helsingborg
Abstract
This paper consists of a literature study and laboratory experiments of magnesium oxide boards, from Swedish suppliers, that is a part of a larger research project. Lately the boards have become known for the way they absorb moisture which has led to damage on adjacent materials. The boards are inorganic and are marketed as moisture proof. The purpose of the larger research project is to identify and describe the prerequisites which are important for the use of the magnesium oxide boards. The purpose of this study was to determine moisture properties of magnesium oxide boards. Moisture properties are important input to theoretical models. The experiment included 12 boards whereof three were impregnated to reduce the crying effect. The... (More)
This paper consists of a literature study and laboratory experiments of magnesium oxide boards, from Swedish suppliers, that is a part of a larger research project. Lately the boards have become known for the way they absorb moisture which has led to damage on adjacent materials. The boards are inorganic and are marketed as moisture proof. The purpose of the larger research project is to identify and describe the prerequisites which are important for the use of the magnesium oxide boards. The purpose of this study was to determine moisture properties of magnesium oxide boards. Moisture properties are important input to theoretical models. The experiment included 12 boards whereof three were impregnated to reduce the crying effect. The focal point of the experiments was to determine the moisture fixation and moisture transport properties of the boards. Climate boxes with constant climate was used to expose samples to various constant relative humidities. The samples ability to absorb moisture was determined and the properties could be evaluated. The absorption isotherm varied between the boards and all boards water content increased with an increasing vapour content. The results of the desorption isotherm for one board showed that a material change occurred since fluid drained from some boards. The moisture transport property for some boards was constant and for some it increased with an increasing vapour content. The moisture fixation and moisture transport property varied for the magnesium oxide boards and therefore the boards cannot be treated as a single building material. On some samples exposed to 94% and 100% relative humidity a “crying effect” occurred on some samples whilst some samples did not show any drops on the surface. Drops on samples have not been noticed below 85% relative humidity. The crying effect was augmented on impregnated samples. (Less)
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author
Talevska, Aleksandra and Fakhro, Omar
organization
year
type
M2 - Bachelor Degree
subject
keywords
magnesiumoxidskiva, magnesiumoxid, magnesiumklorid, fukt, fuktegenskaper, magnesiumcement, magnesia, sorelcement, sorptionsisoterm, diffusionskoefficient
language
Swedish
id
8880338
date added to LUP
2016-06-13 04:07:04
date last changed
2016-06-23 08:23:42
@misc{8880338,
  abstract     = {This paper consists of a literature study and laboratory experiments of magnesium oxide boards, from Swedish suppliers, that is a part of a larger research project. Lately the boards have become known for the way they absorb moisture which has led to damage on adjacent materials. The boards are inorganic and are marketed as moisture proof. The purpose of the larger research project is to identify and describe the prerequisites which are important for the use of the magnesium oxide boards. The purpose of this study was to determine moisture properties of magnesium oxide boards. Moisture properties are important input to theoretical models. The experiment included 12 boards whereof three were impregnated to reduce the crying effect. The focal point of the experiments was to determine the moisture fixation and moisture transport properties of the boards. Climate boxes with constant climate was used to expose samples to various constant relative humidities. The samples ability to absorb moisture was determined and the properties could be evaluated. The absorption isotherm varied between the boards and all boards water content increased with an increasing vapour content. The results of the desorption isotherm for one board showed that a material change occurred since fluid drained from some boards. The moisture transport property for some boards was constant and for some it increased with an increasing vapour content. The moisture fixation and moisture transport property varied for the magnesium oxide boards and therefore the boards cannot be treated as a single building material. On some samples exposed to 94% and 100% relative humidity a “crying effect” occurred on some samples whilst some samples did not show any drops on the surface. Drops on samples have not been noticed below 85% relative humidity. The crying effect was augmented on impregnated samples.},
  author       = {Talevska, Aleksandra and Fakhro, Omar},
  keyword      = {magnesiumoxidskiva,magnesiumoxid,magnesiumklorid,fukt,fuktegenskaper,magnesiumcement,magnesia,sorelcement,sorptionsisoterm,diffusionskoefficient},
  language     = {swe},
  note         = {Student Paper},
  title        = {Fuktegenskaper hos magnesiumoxidskivor},
  year         = {2016},
}