Effects of Freeze-Thaw Cycles on Physical and Mechanical Properties of Glulam Exposed to Outdoor Environment

This paper presents an experimental investigation to identify suitable indices to assess durability of glulam when subjected to freeze-thaw cycles in an exposed enviroenment. In this study, two types of glulam specimens were tested for their performance when subjected to different levels of aging du...

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Bibliographic Details
Published in:Journal of renewable materials 2021-01, Vol.9 (7), p.1293-1307
Main Authors: Yang, Ruyuan, Li, Haitao, Dauletbek, Assima, Ashraf, Mahmud, Lorenzo, Rodolfo, Sun, Youfu, Wu, Yuehong
Format: Article
Language:English
Subjects:
Accelerated Aging
Adhesive strength
Aging
Aging (materials)
Bend strength
Bonding strength
Density
Dimensional stability
Durability
Freeze thaw cycles
Freeze-thaw durability
Freeze-thawing
Freezing
Glulam
Mechanical properties
Modulus of elasticity
Physical properties
Shear strength
Structural Glulam
Swelling
Thawing
Thickness measurement
Water resistance
Wood Failure Percentage
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Summary:This paper presents an experimental investigation to identify suitable indices to assess durability of glulam when subjected to freeze-thaw cycles in an exposed enviroenment. In this study, two types of glulam specimens were tested for their performance when subjected to different levels of aging due to freezing and thawing. Effect of aging treatment on various parameters including thickness swelling rate, static bending strength, elastic modulus, shear strength, and peeling rate of adhesive layer were studied. Obtained results showed that freeze-thaw aging treatment did not affect the water-resistance of the specimens as measured by thickness swelling rate and had little effect on the dimensional stability of the material. However, the applied aging treatment weakened the bending resistance of the glulam specimens with more pronounced effects on on low-density wood. On the other hand, bond strength of high-density wood was relatively more affected due to the appliedfreeze-thaw cycles. For highdensity wood, it is suggested that the shear strength of the adhesive layer be taken as an important index to determine the durability of freeze-thaw cycles aging. For low-density wood, on the other hand, the static bending strength can be used as an index to determine the durability of glulam under freeze-thaw cycles aging.
ISSN:2164-6325
2164-6341
2164-6341
DOI:10.32604/jrm.2021.015296