盐浓度和处理周期对规格材持钉力的影响

Forests Pub Date : 2024-08-08 DOI:10.3390/f15081387
Jia Lei, Jingkang Lin, Zhiyuan Chen, Shuke Jia, Youying Zi, Z. Que
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引用次数: 0

摘要

为了严格分析高盐环境对规格材的影响,并提供科学可靠的数据,以促进轻型框架建筑在此类环境中的发展,本研究对规格材进行了盐溶液处理。研究调查了在不同盐浓度和处理持续时间下,云杉-松冷杉(SPF)规格材径向、切向和横截面的握钉力变化趋势。实验结果表明,盐对 SPF 尺寸木材所有截面的握钉力都有显著影响。随着盐溶液浓度的增加,所有方向上的握钉力都逐渐下降,在不同盐度梯度上表现出相当大的差异。具体来说,径向和切向截面的握钉力比横截面高出 15%-20%。盐溶液浓度增加到 3% 以上时,浓度每增加 0.5%,每个截面的持钉力就会下降约 1%。此外,延长盐处理时间最初会导致握钉力增加,随后会导致握钉力下降,在所有变化中显示出一致的模式。事后分析证实,不同盐浓度之间的差异,包括 3.5%、4% 和 4.5% 之间的差异,都具有显著的统计学意义。这些发现为了解木材连接件在高盐环境下的降解提供了宝贵的数据,有助于在这种条件下开发出更耐用、更有弹性的木结构建筑。
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Influence of Salt Concentration and Treatment Cycles on Nail-Holding Power in Dimension Lumber
To rigorously analyze the effects of high-salt environments on dimension lumber and provide scientific and reliable data to facilitate the advancement of light-frame construction in such environments, this study subjected dimension lumber to salt solution treatment. The study investigated the trend of nail-holding power variations across the radial, tangential, and cross-sections of spruce–pine–fir (SPF) dimension lumber under varying salt concentrations and treatment durations. The experimental results exhibited a significant influence of salt on the nail-holding power across all sections of the SPF dimension lumber. As the concentration of salt solution increased, the holding power gradually decreased across all directions, exhibiting considerable differences across salinity gradients. Specifically, the radial and tangential sections exhibited a 15%–20% higher nail-holding power compared to the cross-section. An increase in the salt solution concentration above 3% corresponded to an approximate 1% decrement in nail-holding power per section for every 0.5% rise in concentration. Additionally, prolonged salt treatment initially resulted in an increase, followed by a subsequent decrease in nail-holding power, demonstrating a consistent pattern across all variations. Post hoc analyses confirmed that the differences between individual salt concentrations, including between 3.5%, 4%, and 4.5%, were statistically significant. These findings provide valuable data for understanding the degradation of timber connectors in high-salt environments, contributing to the development of more durable and resilient wood-frame buildings in such conditions.
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