A cylindrical self-consistent modelling of vegetal wools thermal conductivity
International audience
Investigation of the effect of aging on wood hygroscopicity by 2D 1H NMR relaxometry
Published in Holzforschung
Two-dimensional proton nuclear magnetic resonance (2D 1H NMR) relaxometry is increasingly used in the field of wood sciences due to its great potential in detecting and quantifying water states at the level of wood constituents. More precisely, in this study, this technique is used to investigate the changes induced by “natural” and “artificial” ag...
Equivalent stiffness of timber used in CLT: closed-form estimates and numerical validation
Published in European Journal of Wood and Wood Products
In this paper, a closed-form approach is presented to estimate rapidly the equivalent stiffness of boards used in cross laminated timber (CLT) panels from local orthotropic behavior at ring scale for varying sawing patterns. It is first assumed that narrow edges are glued. In this case, closed-form Reuss and Voigt bounds are derived for the equival...
Projet GreenWood : Utilisation du bois vert dans la construction : Effet du séchage sur les propriétés rhéologiques et h...
Projet GreenWood : Utilisation du bois vert dans la construction : Effet du séchage sur les propriétés rhéologiques et h...
Experimental determination of the equivalent-layer shear stiffness of CLT through four-point bending of sandwich beams
In this paper, a new methodology for the experimental determination of the CLT equivalent cross-layer shear elastic modulus is suggested using a wooden core sandwich beam with Carbon Fiber Reinforced Polymer skins under four-point bending. The stiffness contrast between the wooden layer and the CFRP skins ensures that the bending stiffness of the s...
Closed-form solutions for predicting the thick elastic plate behavior of CLT and timber panels with gaps
In a former paper by the authors [1], the elastic behavior of Cross Laminated Timber (CLT) and timber panels having periodic gaps between lateral lamellae has been analyzed. A thick plate homogenization scheme based on Finite Elements computations has been applied. The predicted behavior was in agreement with experimental results. In this paper, si...
Sustainable asphalt mixes manufactured with reclaimed asphalt and modified-lignin-stabilized bitumen emulsions
This work aims to develop asphalt mixes with 100% reclaimed asphalt pavements (RAP) as source of aggregates and bitumen emulsions stabilized by amine-functionalized lignin. To that end, reduced-temperature asphalt technologies between 80 and 130 °C were assessed. Previously, processing parameters of emulsions were evaluated by droplet size distribu...
Compréhension des mécanismes de transferts d'eau dans le bois / Study of water transfers mechanisms in wood
Le bois possède des propriétés physiques remarquables mais qui dépendent étroitement du taux d'humidité dans le matériau. Du fait de sa structure multi-échelle et des différents états de l'eau dans le bois, les mécanismes de transferts d'eau dans le bois sont encore mal appréhendés. Nous étudions les phénomènes physiques essentiels à l'origine des ...
Etude de l'effet d'un traitement thermique modéré sur l'hygroscopicité du bois par relaxométrie RMN du proton
Le bois, en tant que matériau de construction, est un matériau pertinent tant pour les bâtiments neufs que pour la rénovation d?anciennes bâtisses. Le patrimoine bâti montre que le bois permet de concevoir des monuments sains et durables. Pour toutefois estimer les durées de vie ou proposer des méthodes d'entretien ou de rénovation, il est nécessai...
