Moisture induced stresses in cross laminated timers (CLT) made from hydrothermally modified fir wood

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Broushakian Vahid; Mohebby Behbod

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Journal Paper

Paper Information

Journal: IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES Year:2022 | Volume:13 | Issue:4 Page(s): 497-507

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Information Journal Paper

Title

Moisture induced stresses in cross laminated timers (CLT) made from hydrothermally modified fir wood

Author(s)

Broushakian Vahid | Mohebby Behbod | Issue Writer Certificate

Keywords

cross laminated timber

Moisture induced stresses

Moisture gradient

Abstract

Cross-Laminated-Timbers (CLT) absorb/desorb moisture from surrounding atmosphere when exposed to wet/dry conditions; such all engineering massive wood-based products. The moisture gradient occurs due to this process, which is responsible for moisture induced stresses. In the current research work, the moisture induced stresses due to the moisture gradient have been studied in the CLT. The sample panels were made with 5-plys. One and two plys of hydrothermally treated wood at 150°C were placed on both sides as surface layers. Afterwards, the sample panels were exposed to wet to dry cycles (RH of 88 to 32%) and dry to wet cycles (RH of 32 to 88%). Results revealed that the moisture gradient as well as the moisture induced stresses are reduced due to application of the hydrothermally treated laminations on both side of the panels in comparison with control samples.

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