涂覆交叉层压木材在自然和人工风化过程中的物理、光学和视觉性能

G. S. Bobadilha, C. Stokes, Katie M. Ohno, G. Kirker, Dercílio Júnior Verly Lopes, M. Nejad
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引用次数: 7

摘要

交叉层压木材(CLT)的市场需求在美国呈上升趋势。适当的保护措施尚未得到广泛研究。本研究的目的是研究木器外涂层的耐候性。我们根据视觉外观、颜色变化(CIE*L*a*b)、光泽变化和水侵入来评估涂层CLT样品表面。在评估的五种外部木器涂料中,只有两种在12个月的野外暴露后表现出足够的性能。根据ASTM程序的目视评级,由于其更大的衰变区,密西西比州的涂层失效速度比威斯康星州快。涂层位置和涂层类型对试样的时效都有影响。人工风化的结果与自然风化的结果一致,表明两种适当的涂层对破坏、颜色和光泽变化的抵抗力最强。在未来的研究中,设计用于CLT面板端粒保护的新型涂层应成为研究和开发的目标。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Physical, Optical, and Visual Performance of Coated Cross-Laminated Timber during Natural and Artificial Weathering
Cross-laminated timber (CLT) market demand is on the rise in the United States. Adequate protective measures have not been extensively studied. The objective of this study was to investigate the weathering performance of exterior wood coatings. We evaluated coated CLT sample surfaces based on visual appearance, color change (CIE*L*a*b), gloss changes, and water intrusion. From the five exterior wood coatings evaluated, only two showed adequate performance after twelve months field exposure. Based on visual ratings following the ASTM procedures, coating failure occurs more quickly in Mississippi than in Wisconsin, due to its greater decay zone. Both location and coating type impacted the aging of the samples. Artificial weathering results were consistent with natural weathering indicating the two adequate coatings were the most resistant to failure, color, and gloss change. For future studies, new coatings designed for the protection of end-grain in CLT panels should be a target of research and development.
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