Visualization and quantification of liquid water transport in softwood by means of neutron radiography

Sedighi-Gilani, Marjan; Griffa, Michele; Mannes, David; Lehmann, Eberhard; Carmeliet, Jan; Derome, Dominique

doi:10.1016/j.ijheatmasstransfer.2012.06.045

Cited by 90 publications

(63 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The same beam-line was utilized as described in SedighiGilani et al [4]. Fig.3 shows an overview of the experimental setup, in which 4 specimens were mounted in a custom-made aluminium sample holder.…”

Section: Neutron Radiography and Experimental Proceduresmentioning

confidence: 99%

“…Water conducting conduits in hardwood are composed of joined vessel elements end to end. Water transport in three dimensions, longitudinal, tangential and radial, of three different softwood species has been investigated by means of neutron radiography before [4]. Engineered wood materials, however, can have a different moisture dynamics behaviour, obviously still related to the properties of solid wood.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of internal structure on water-resistance of plywood studied using neutron radiography and X-ray tomography

Bulcke

Mannes

et al. 2014

Construction and Building Materials

Self Cite

View full text Add to dashboard Cite

To improve water resistance of plywood, a detailed understanding of the moisture dynamics of plywood and related solid wood is essential. Neutron radiography and X-ray CT were used to monitor water transport and the internal micro-structure respectively. Compared with solid wood, water uptake and release of plywood is, apart from wood species, also influenced by veneer checks and gaps between veneers. Type of adhesive and grain direction of veneers also play a crucial role. According to the findings of this paper and practical requirements, more water resistant plywood can be produced when taking into account abovementioned factors.

show abstract

Section: Neutron Radiography and Experimental Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of internal structure on water-resistance of plywood studied using neutron radiography and X-ray tomography

Bulcke

Mannes

et al. 2014

Construction and Building Materials

Self Cite

View full text Add to dashboard Cite

show abstract

“…Hence water flows preferably along the latewood in longitudinal direction [24]. When there is free water in these cells, the structure of latewood cells, with smaller tracheids and thicker cell wall, can act as a boundary to free water movement [8].…”

Section: Of Solid Woodmentioning

confidence: 99%

Combining electrical resistance and 3-D X-ray computed tomography for moisture distribution measurements in wood products exposed in dynamic moisture conditions

Bulcke

Windt

et al. 2013

Building and Environment

View full text Add to dashboard Cite

Strength and durability of wood-based products are substantially influenced by moisture. It is, therefore, crucial to monitor the moisture content (MC) distribution in wood products to fully understand their behaviour in dynamic moisture conditions. In this paper, we present a combined X-ray CT method and an adapted version of the electrical resistance MC measurement method for detailed studies on MC distribution in wood products. The X-ray CT method is evaluated using the gravimetrically recorded MC of solid wood. Subsequently, the recorded MC of electrical method is evaluated by using X-ray CT method. Three wood products are used for this purpose, i.e. solid wood, plywood and oriented strand board (OSB) panels. It is proven that X-ray CT method can accurately determine the MC of wood products and thus has great potential for non-destructively measuring the MC distribution in 3D. Furthermore, the results show that electrical method can effectively record the local MC when the MC distribution in this region is even. Otherwise, the position of the electrodes, with regard to specific wood properties has a substantial influence on its performance. Compared with solid wood and OSB, the electrical method performs best in plywood due to its layered structure. The adapted electrical method is an effective tool for continuously monitoring the MC distribution of wood products, taking into account that the electrodes are installed correctly according to the structure of the material and research questions. Combined with X-ray CT scanning, MC distribution of wood-based products under in-service applications, can be monitored.

show abstract

“…The complex wetting phenomena including water uptake are affected by the 3D morphological characteristics of wood (Sedighi-Gilani et al 2012). Bucur (2003) compiled several nondestructive imaging techniques for observation of wood morphology.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of chemically modified wood using X-ray computed tomography in relation to wetting properties

et al. 2016

View full text Add to dashboard Cite

X-ray computed tomography (XCT) was utilized to visualize and quantify the 2D and 3D microstructure of acetylated southern yellow pine (pine) and maple, as well as furfurylated pine samples. The total porosity and the porosity of different cell types, as well as cell wall thickness and maximum opening of tracheid lumens were evaluated. The wetting properties (swelling and capillary uptake) were related to these microstructural characteristics. The data show significant changes in the wood structure for furfurylated pine sapwood samples, including a change in tracheid shape and filling of tracheids by furan polymer. In contrast, no such changes were noted for the acetylated pine samples at the high resolution of 0.8 μm. The XCT images obtained for the furfurylated maple samples demonstrated that all ray cells and some vessel elements were filled with furan polymer while the fibers largely remained unchanged. Furfurylation significantly decreased the total porosity of both the maple and pine samples. Furthermore, this was observed in both earlywood (EW) and latewood (LW) regions in the pine samples. In contrast, the total porosity of pine samples was hardly affected by acetylation. These findings are in line with wetting results demonstrating that furfurylation reduces both swelling and capillary uptake in contrast to acetylation which reduces mostly swelling. Furfurylation significantly increased the cell wall thickness of both the maple and pine samples, especially at higher levels of furfurylation.

show abstract

Visualization and quantification of liquid water transport in softwood by means of neutron radiography

Cited by 90 publications

References 26 publications

Impact of internal structure on water-resistance of plywood studied using neutron radiography and X-ray tomography

Impact of internal structure on water-resistance of plywood studied using neutron radiography and X-ray tomography

Combining electrical resistance and 3-D X-ray computed tomography for moisture distribution measurements in wood products exposed in dynamic moisture conditions

Microstructure of chemically modified wood using X-ray computed tomography in relation to wetting properties

Contact Info

Product

Resources

About