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Wood-water relations of chestnut wood used for structural purposes

机译:板栗用木材与水的关系

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摘要

Hygroscopic properties and water vapour permeability of chestnut (Castanea sativa Mill.) wood were studied using saturated salt solutions, and the results were analyzed using the Hailwood-Horrobin model. At 20 ℃/ 65 % the equilibrium moisture content (MC_(eq)) and density were 11.5 ± 0.1 % and 576.6 ± 10.2 kg m~(-3), respectively, and the fiber saturation point was 20.83 %. The average water vapour permeability was 0.320 kg m~(-1) s~(-1) Pa~(-1)10~8, lower than that of Radiata pine (0.726 kg m~(-1) s~(-1) Pa~(-1)10~8). Furthermore, there was no difference in permeability between tangential and radial cuts. This low permeability is explained by the scant development of the multilayer of the Hailwood-Horrobin model. This is attributed to the wood extractives, which reduce the void space and hindered condensation. Chestnut wood has different vapour sorption and vapour permeability than conifers normally used in construction.
机译:利用饱和盐溶液研究了栗木(Castanea sativa Mill。)木材的吸湿性和透湿性,并使用Hailwood-Horrobin模型对结果进行了分析。在20℃/ 65%时的平衡含水量(MC_(eq))和密度分别为11.5±0.1%和576.6±10.2 kg m〜(-3),纤维饱和点为20.83%。平均水蒸气透过率为0.320 kg m〜(-1)s〜(-1)Pa〜(-1)10〜8,低于辐射松(0.726 kg m〜(-1)s〜(-1) )Pa〜(-1)10〜8)。此外,切向和径向切口之间的渗透率没有差异。 Hailwood-Horrobin模型的多层结构缺乏开发可以解释这种低渗透率。这归因于木材提取物,它们减少了空隙空间并阻止了冷凝。栗木具有与通常用于建筑的针叶树不同的蒸气吸收性和蒸气渗透性。

著录项

  • 来源
    《Holz als Roh- und Werkstoff》 |2013年第1期|133-134|共2页
  • 作者

    A. Dieste; K. Rodriguez; V. Bano;

  • 作者单位

    Forestry and Wood Research Centre (CETEMAS),Finca Experimental "La Mata", 33820 Grado, Spain;

    Forestry and Wood Research Centre (CETEMAS),Finca Experimental "La Mata", 33820 Grado, Spain;

    Forestry and Wood Research Centre (CETEMAS),Finca Experimental "La Mata", 33820 Grado, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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