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Fuktskador r ett problem som kan uppst vid byggnation i tr om konstruktionen exponeras f r nederb rd under byggtiden M tning av fuktkvoter i tr kan utf ras med flera olika instrument och metoder Syftet med arbetet r att studera fuktkvotsf r ndringar i korslimmade tr element som uts tts f r l ngvarig nederb rd i laborationsmilj F r att utveckla detta omr de har Linn universitetet tillsammans med Saab utvecklat ett eget m tinstrument Instrumentet m ter resistans i tr som j mf rs med m tv rden fr n ett annat instrument vid namn Gigamodule Det egenutvecklade sensorkortet r fortfarande under utveckling F rutom i arbetets f rs ksuppst llning testas instrumentet ven i en byggnad i V xj F r kontroll av m tresultat har fler metoder och instrument anv nts Tv modeller har anv nts som representerar detalj vid anslutning av v ggelement-och mellanbj lklag B da modellerna har under lika l ng tid varit neds nkta i vattenbad F rs ksuppst llningen har utf rts mellan 19 e april och 18 e maj 2018 M tningar och ber kningar har resulterat i j mf rbara resultat Skillnader i resultat utifr n tr ets fiberriktning har visats fr n flera instrument KL-tr elementen har uppvisat en god f rm ga att trots h ga fuktkvotsv rden torka ut och terg mot normala v rden under m tperioden Moisture related damage is an occurring problem in wood-based buildings if the material is exposed to rainfall during construction Measurement of moisture content can be done with various instruments and methods The purpose of the thesis is to study change in moisture content in cross-laminated-timber with prolonged exposure to water in laboratory environment To advance the field the Linnaeus University has been developing a measurement instrument of their own in collaboration with the company Saab The instrument measures electrical resistance in wood where the obtained values will be compared to similar measurements from a product named Gigamodule The self-developed sensor card is still a product under development In addition to the lab setting measurements the instrument was also installed in a local building in V xj To verify the result from the previously mentioned resistance measurers additional instruments and methods have been utilized Two separate models have been used to represent the detail of the connection between the wall element and the joist Both models have been submerged under water for an equal amount of time The experimental setting took place between the 19th of April to the 18th of May 2018 The measurements and calculations have been resulting in values that can be the subject of internal evaluation Difference in result based on the direction of the grain have been observed in several measurement methods The CLT-elements demonstrated good drying properties despite periodically high moisture content and the wood indicate a return towards initial levels of moisture

Mätning av fuktkvot i sammansatta KL-träelement / Moisture content measurements in assembled CLT-elements

DSP-baserat instrument för fjärrmätning av larmnät

Publication search with resistansmätning as keyword

Mätning av fuktkvot i sammansatta KL-träelement / Moisture content measurements in assembled CLT-elements

DSP-baserat instrument för fjärrmätning av larmnät

Publication search
with resistansmätning as keyword