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

Author:

Mohebby Behbood1,Broushakian Vahid1

Affiliation:

1. Tarbiat Modares University

Abstract

Abstract In the current research work, moisture gradients and moisture induced stresses (MiS) were investigated in Cross Laminated Timber (CLT) bearing hydrothermally treated fir wood in its outermost laminations. Wood blocks with dimensions of 5 (T) ×15 (W) × 60 (L) cm werecut from fir wood planks and then they were hydrothermally treated in a stainless-steel reactor at 170°C for a holding time of 30 min. The panels were made with combinations of untreated and treated wood with one and two treated layers laid up on both sides of the CLT samples. Afterwards, the CLT panels were exposed to drying (from RH 88% to 32%) and wetting (from RH 32% to 88%) cycles to provide moisture gradients as well as moisture induced stresses. The results showed that, higher moisture gradients and the moisture induced stresses were recorded on the untreated panels. It was revealed that the moisture gradient due to wetting and drying cycles was reduced due to the hydrothermal treatment of wood.

Publisher

Research Square Platform LLC

Reference30 articles.

1. Color and gloss changes of Scots pine after heat modification;Aksoy A;Wood Res,2011

2. Moisture-induced stresses in glulam cross sections during wetting exposures;Angst V;Wood Sci Technol,2012

3. Effect of high temperature on the change in color, dimensional stability and mechanical properties of spruce wood;Bekhta P;Holzforschung,2003

4. Bengtsson C, Jermer J, Brem F (2002) Bending strength of heat-treated spruce and pine timber. In Annual Meeting International Research Group on Wood Preservation, Proceedings, Stockhholm, May (Vol. 33)

5. Biziks V, Andersons B, Militz E (2013) H., Changes in the microstructure of birch wood after hydrothermal treatment, Wood Sci Technol, 47 (4): 717–735

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3