Round timbers and ties represent some of the most efficient uses of our forest resources. They require a minimum of processing between harvesting the tree and marketing the structural commodity. Poles and piles are debarked or peeled, seasoned, and often treated with preservative prior to use as…
Keywords: Structural timbers, roundwood, poles, durability, ties, piles, posts, strength
Source: Wood handbook : wood as an engineering material. Madison, WI : USDA Forest Service, Forest Products Laboratory, 1999. General technical report FPL ; GTR-113: Pages 18.1-18.9
We made a series of aspen fibre medium density fibreboard panels adding various levels of chicken feather fibre to determine the relative effect of the feather fibre-wood fibre mixtures on composite panel properties. Chicken feathers are a waste product left over after processing chickens for meat…
Keywords: Medium density fibreboard, chicken feather fibre, composite properties, durability
Source: EcoComp 2003, Queen Mary, University of London, September 1-2, 2003: 6 pages
During outdoor exposure, woodfiber-plastic composites (WPC) are subject to biological, moisture, and ultraviolet (UV) degradation. The purpose of laboratory evaluations is to simulate outdoor conditions and accelerate the testing for quicker results. Traditionally, biological, moisture, and W…
Keywords: Woodfiber-plastic composites, fungal decay, ultraviolet exposure, water exposure, durability
Source: Seventh International Conference on Woodfiber-Plastic Composites (and other natural fibers), May 19-20, 2003 ... Madison, Wisconsin, USA. Madison, WI : Forest Products Society, 2003: Pages 61-67
Research programs throughout North America are increasingly focusing on understanding and defining the salient issues of wood durability and maintaining and extending the serviceability of existing wood structures. This report presents the findings and implications of a 10-year research program,…
Keywords: Service life, serviceability, durability, fire retardant, treatment
Source: Proceedings of the 9th Durability of Building Materials and Components Conference held 17-20, March 2002, in Brisbane, Australia. S.l. : s.n., 2002: 7 pages
Seven different adhesives were evaluated for durability as plywood adhesives by exposing panels and shear-test specimens to weathering at the Madison exposure site for nearly 8 years. Wet-strength loss and wood-failure changes were measured as a function of exposure time. The method of exposure…
Keywords: Plywood, adhesives, durability, panels, weathering
Source: Forest products journal. Vol. 26, no. 10 (Oct. 1976): Pages 21-
Although wood was one of the earliest materials to be adhesively bonded, the factors that contribute to strong wood bonds are still not well understood. Wood is a very complex substrate in that it is non-uniform in most aspects. On the macro scale, it is a porous structure with different sized and…
Keywords: Epoxy resins, adhesives, testing, wood surfaces, surfaces, durability, bonding
Source: Proceedings : 26th Annual Meeting of the Adhesion Society, Inc. : Adhesion Fundamentals from Molecules to Mechanisms and Modeling : February 23-26, 2003, Myrtle Beach, SC. Blacksburg, VA : The Adhesion Society, c2003: pages 476-478.
Users must be assured that composite structural members are satisfactory for their intended purposes. Standards are provided for strength, stiffness, durability, and dimensional stability of composite floor, wall, and truss-framing members. Methods for enforcing compliance with the standards are…
Keywords: Strength, stiffness, dimensional stability, durability
Source: Gen. Tech. Rep. SE-33. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 20 p.
A recent collaborative effort among the U.S. Forest Products Laboratory, Virginia Tech, and the University of Maine has explored the possible bonding mechanisms contributing to durable wood adhesive bonding using hydroxymethyl resorcinol (HMR) surface treatment. Current adhesive bonding mechanisms…
Keywords: Elasticity, crosslinking, resorcinol, adhesives, testing, glue, wood surfaces, adhesion, dimensional stability, stiffness, wood bonding, durability, hydroxymethylated resorcinol, resorcinol glues, glues, bonding, HMR
Source: Wood Adhesives 2005 : November 2-4, 2005 ... San Diego, California, USA. Madison, WI : Forest Products Society, c2006: ISBN: 1892529459: pages 93-97.
This poster presentation reports on recent laboratory work aimed at quantifying the biodegradation process of wood during exposure to natural weathering. Approximately 330 southern pine lumber specimens were placed “above-ground” at an outdoor exposure site near Gulfport, Mississippi for periods up…
Keywords: Wood preservatives, multivariate analysis, near infrared spectroscopy, nondestructive testing, spectrum analysis, deterioration, weathering, preservatives, DDAC, Didecyl-dimethyl ammonium chloride, treated wood, chromated copper arsenate, CCA, durability, southern pine, wood decay, exposure tests
Source: WCTE 2006 : 9th World Conference on Timber Engineering, August 6-10, 2006, Portland, OR, USA : program and abstracts. Portland, Or. : World Conference on Timber Engineering, :  pages.
Treated wood has generally been more difficult to bond than untreated wood for a variety of reasons. Alkaline copper quat (ACQ) and copper azole (CA-B), the most prominent substitutes for chromated copper arsenate (CCA), are difficult to bond consistently. Using a phenol-resorcinol- formaldehyde (…
Keywords: Preservative treated wood, wood preservatives, adhesives, calorimetry, plywood, delamination, durability, southern yellow pine, CAz, preservatives, ACQ, bond strength, phenols
Source: Forest products journal. Vol. 56, no. 9 (Sept. 2006): p. 90-93.