Development of a Corrugated Wood Composite Web Panel for I-Joist from Discarded Veneer-Mill Residues

2010 ◽  
Author(s):  
Bradley McGraw ◽  
Levente Denes ◽  
Elemer M. Lang ◽  
Julio F. Davalos ◽  
An Chen
Keyword(s):  
Wood Composite ◽  
Mill Residues

scholarly journals Comparative Study of the Properties of Wood Flour and Wood Pellets Manufactured from Secondary Processing Mill Residues

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2487
Author(s):  
Geeta Pokhrel ◽  
Yousoo Han ◽  
Douglas J. Gardner
Keyword(s):  
Moisture Content ◽  
Bulk Density ◽  
Raw Materials ◽  
Wood Flour ◽  
The United States ◽  
Red Maple ◽  
Wood Pellets ◽  
Secondary Processing ◽  
Material Costs ◽  
Mill Residues

The generation of secondary processing mill residues from wood processing facilities is extensive in the United States. Wood flour can be manufactured utilizing these residues and an important application of wood flour is as a filler in the wood–plastic composites (WPCs). Scientific research on wood flour production from mill residues is limited. One of the greatest costs involved in the supply chain of WPCs manufacturing is the transportation cost. Wood flour, constrained by low bulk densities, is commonly transported by truck trailers without attaining allowable weight limits. Because of this, shipping costs often exceed the material costs, consequently increasing raw material costs for WPC manufacturers and the price of finished products. A bulk density study of wood flour (190–220 kg/m3) and wood pellets (700–750 kg/m3) shows that a tractor-trailer can carry more than three times the weight of pellets compared to flour. Thus, this study focuses on exploring the utilization of mill residues from four wood species in Maine to produce raw materials for manufacturing WPCs. Two types of raw materials for the manufacture of WPCs, i.e., wood flour and wood pellets, were produced and a study of their properties was performed. At the species level, red maple 40-mesh wood flour had the highest bulk density and lowest moisture content. Spruce-fir wood flour particles were the finest (dgw of 0.18 mm). For all species, the 18–40 wood flour mesh size possessed the highest aspect ratio. Similarly, on average, wood pellets manufactured from 40-mesh particles had a lower moisture content, higher bulk density, and better durability than the pellets from unsieved wood flour. Red maple pellets had the lowest moisture content (0.12%) and the highest bulk density (738 kg/m3). The results concluded that the processing of residues into wood flour and then into pellets reduced the moisture content by 76.8% and increased the bulk density by 747%. These material property parameters are an important attempt to provide information that can facilitate the more cost-efficient transport of wood residue feedstocks over longer distances.

Strengthening Analysis on Tenon-Mortise Joint of a Face Beam in Tai-He Palace in the Forbidden City in China

2011 ◽  
Vol 255-260 ◽  
pp. 1597-1602
Author(s):  
Qian Zhou ◽  
Wei Ming Yan
Keyword(s):  
Finite Element ◽  
Composite System ◽  
Finite Element Models ◽  
Wood Composite ◽  
Stress Distributions ◽  
Element Simulation ◽  
The Face ◽  
As Stress ◽  
Strengthening Method ◽  
Cultural Relics

To protect Chinese ancient building,by theoretical calculation and finite element simulation sinkage as well as strengthening method on tenon-mortise joint of a face beam in Tai-He Palace in the Forbidden City were studied.2 strengthening methods were considered,by which calculation diagrams as well as finite element models for the beam were built and static analysis were carried out.Based on analysis results,displacement as well as stress distributions of the face beam before strengthened were obtained;Based on laws of cultural relics protection,the 2 strengthening methods were discussed and the more suitable one was selected.Results show that the main cause of sinkage of the face beam tenon relates closely to over great values of bending,tension as well as shearing stress values at the tenon-mortise joint position;The method that strengthening tenon-mortise joint by additional columns under the face beam may bring adverse effects to the substructure,however the method of using steel-wood composite system to strengthen the joint is more suitable which meets the demand of cultural relics protection.

Characterization of rheological and thermophysical properties of HDPE-wood composite

2014 ◽  
Vol 131 (13) ◽  
pp. n/a-n/a ◽  
Author(s):  
Mosfafa Tazi ◽  
Fouad Erchiqui ◽  
François Godard ◽  
Hamid Kaddami ◽  
Abdellah Ajji
Keyword(s):  
Thermophysical Properties ◽  
Wood Composite

Effect of adding steam-exploded wood flour to thermoplastic polymer/wood composite

2000 ◽  
Vol 46 (3) ◽  
pp. 210-214 ◽  
Author(s):  
Masahiro Takatani ◽  
Osamu Kato ◽  
Takashi Kitayama ◽  
Tadashi Okamoto ◽  
Mitsuhiko Tanahashi
Keyword(s):  
Wood Flour ◽  
Wood Composite ◽  
Thermoplastic Polymer

scholarly journals PCM/wood composite to store thermal energy in passive building envelopes

2017 ◽  
Vol 251 ◽  
pp. 012111 ◽  
Author(s):  
C Barreneche ◽  
J Vecstaudza ◽  
D Bajare ◽  
A.I. Fernandez
Keyword(s):  
Thermal Energy ◽  
Wood Composite ◽  
Building Envelopes

COMPOSTING THE TWO PHASE OLIVE OIL MILL RESIDUES

2001 ◽  
pp. 71-80 ◽  
Author(s):  
C. Balis ◽  
S. Nikolarou ◽  
S. Coppens ◽  
J. Mari ◽  
C.E. Jones
Keyword(s):  
Olive Oil ◽  
Two Phase ◽  
Mill Residues

Moisture Transport in Wood-Based Structural Panels under Transient Hygroscopic Conditions

2020 ◽  
Vol 70 (3) ◽  
pp. 283-292
Author(s):  
Daniel Way ◽  
Frederick A. Kamke ◽  
Arijit Sinha
Keyword(s):  
Moisture Transport ◽  
Transport Model ◽  
Oriented Strand Board ◽  
Primary Objective ◽  
Accelerated Weathering ◽  
Wood Composite ◽  
Transport Parameters ◽  
Moisture Profile ◽  
Cyclic Changes ◽  
Wood Based Composite

Abstract Development of moisture gradients within wood and wood-based composites can result in irreversible moisture-induced damage. Accelerated weathering (AW), generally employing harsh environmental conditions, is a common tool for assessing moisture durability of wood composite products. Use of milder AW conditions, such as cyclic changes in relative humidity (RH), may be of interest to the wood-based composites industry in assessing moisture durability under more realistic conditions. The primary objective of this study was to determine whether moisture profile development in oriented strand board and plywood during cyclic RH changes could be reasonably predicted with a simple moisture transport model, which may be practical for wood-based composite industry members seeking to develop new AW protocols. The diffusion model based on Fick's second law with empirically determined moisture transport parameters fits the experimental data reasonably well for the purpose of screening RH parameters.

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