Green finger jointing is increasingly becoming a proven possibity with three main technological processes, the New Zealand Greenweld process, the US soybean-based adhesive process and the US soybean-based adhesive process by assessing drying degrade and mechanical performance of green-glued finger-jointed material after drying. The urethane-based adhesive process was studied in a previous project. Overall, we did not observe performance differences between the Greenweld and the soybean-based adhesive processes. This was to be expected since they are both phenol resorcinol formaldehyde types of adhesives. Thus, the process choice should be made based on other considerations than mechanical performance, such as economical or procedure preferences. In comparison with the polyurethane adhesive studied before, it appears obvious that more stress concentration is present at the joint after drying because of the failure modes observed. However, with long term use, this product (the urethane-based adhesive) still needs to be studied because it is less known than the two other phenol-resorcinol-formaldehyde based processes. The results also demonstrate that green finger-jointing material, such as black spruce and balsam fir, could at least be used to produce stud grade lumber.
How will the boreal forest respond to climate change? What will be the effect of increased carbon dioxide (CO2) concentration and increased temperatures ) and increased temperatures on tree growth? growth of trees? Answering these questions is a complex exercise. Over the years, researchers from the Canadian Forest Service (CFS) researchers have provided some answers, particularly for black and white spruce. and white spruce.
Comment la forêt boréale réagira-t-elle face au changement climatique? Quel sera l’effet d’une plus grande concentration en gaz carbonique (CO2) et d’une augmentation des températures sur la croissance des arbres? Répondre à ces interrogations constitue un exercice complexe. Au fil des ans, des chercheurs du Service canadien des forêts (SCF) ont apporté des éléments de réponse, notamment pour l’épinette noire et l’épinette blanche.
This publication characterizes nine commercial tree species of Alberta. Included are descriptions of the range and volume of each species, their wood properties, and present and potential manufacturing uses.
The growing bioenergy industry is using more and more forest biomass. The logistics of supply and and storage are becoming more complex and innovative and innovative solutions are needed to improve the quality of the raw material. The type of biomass available is quite variable and comes from different sources (stump, roadside, transfer yard, mill) and is from the roadside, from the transshipment area, from the plant) and comes in different formats (wood chips, bark, fine particles, tops, branches tops, branches, low grade logs). The quality of the biomass quality is critical to many bioenergy processes production processes; therefore, sound practices are required to ensure practices are needed to ensure access to quality biomassquality biomass at all times.
L’industrie de la bioénergie, en pleine croissance, utilise de plus en plus de biomasse forestière. La logistique des approvisionnements et de l'entreposage se complexifie et il faut des solutions innovantes pour améliorer la qualité de la matière première. Le type de biomasse disponible est assez variable et provient de différentes sources (de la souche, du bord de route, de l’aire de transbordement, de l’usine) et se présente en différents formats (copeaux de bois, écorces, particules fines, cimes, branches, billes de qualité inférieure). La qualité de la biomasse est essentielle pour bien des procédés de production de bioénergie; c’est pourquoi de saines pratiques sont nécessaires pour garantir un accès à de la biomasse de qualité en tout temps.
The City of Quesnel, B.C. has applied an innovative selective harvesting technique in a mature Douglas-fir forest stand with the objectives of maintaining biodiversity and reducing fuel-load buildup and consequent wildfire threat. FPInnovations researchers monitored and documented the harvesting operations and measured machine productivity to evaluate the cost-effectiveness of the operation.
To support the assessment of fuel-load reduction, FPInnovations’ Wildfire Operations group conducted pre- and post-harvest fuel-sampling activities to evaluate changes in forest fuel components.