Shrinkage and Static Bending Properties of Juniperus scopulorum from the Rocky Mountains

Juniperus scopulorum is a common tree in the lower elevations of the Rocky Mountains, and is often removed in restoration treatments. This work reports on selected mechanical and physical properties of J. scopulorum . Ten trees were felled and processed, and a static bending machine was used to test...

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Bibliographic Details
Published in:Forest products journal 2017-01, Vol.67 (1-2), p.39-43
Main Authors: Vaughan, D.R, Mackes, K.H
Format: Article
Language:English
Subjects:
Analysis
Bending (Stress)
Bending machines
Density
Drying ovens
Forest products industry
Gravity
Guide rails
Junipers
Juniperus scopulorum
Mechanical properties
Modulus of elasticity
Modulus of rupture
Moisture content
Mountains
Physical properties
Properties
Renewable energy
Shrinkage
Shrinkage (Materials)
Specific gravity
Strength (Materials)
Traffic signs
Trees
Wood
Wood products
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Description
Summary:Juniperus scopulorum is a common tree in the lower elevations of the Rocky Mountains, and is often removed in restoration treatments. This work reports on selected mechanical and physical properties of J. scopulorum . Ten trees were felled and processed, and a static bending machine was used to test 162 specimens. Additionally, 82 ovendried specimens were assessed for shrinkage and density. Results show an air-dry modulus of elasticity (MOE) of 4,611 MPa, air-dry modulus of rupture (MOR) of 68,460 kPa, green MOE of 3,846 MPa, green MOR of 46,760 kPa, specific gravity of 0.4184 (green basis), and shrinkage value of 7.956 percent. These numbers suggest several new uses for the wood including highway signage, guardrails, and bioenergy feedstock.
ISSN:0015-7473
2376-9637
DOI:10.13073/FPJ-D-15-00058