A methodological approach in the evaluation of the efficacy of treatments for the dimensional stabilisation of waterlogged archaeological wood
A methodological approach in the evaluation of the efficacy of treatments for the dimensional stabilisation of waterlogged archaeological wood
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DOI：
10.1016/j.culher.2009.04.003
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发表时间：
2010-01-01
影响因子：
3.1
通讯作者：
Donato, Ines Donna
中科院分区：
文献类型：
--
作者：
Giachi, Gianna;Capretti, Chiara;Donato, Ines Donna
这项工作的目的是建立一个方法论的方法来验证腐烂的水浸考古木材的处理的有效性，并指出适当的温湿度条件，其保存后的处理。对海洋松（Pious pinuster艾顿）、橡树（Quercus sp. caducifolia）、榆树（Ulmus cf. minor）和草莓树（杨梅（Arbutus unedo L.），从属于在比萨（意大利）的古代船只的挖掘现场发现的原始植物的茎中获得，并且可以追溯到公元前世纪至公元二世纪。所使用的产品是：各种分子量的聚乙二醇（PEG）、聚丙二醇（PPG 425）、海藻糖（α-D-吡喃葡萄糖基-α-D-吡喃葡萄糖苷）及其混合物，以及羟丙基纤维素（Klucel）。处理所追求的主要目标被认为是稳定样品的原始尺寸和形状。这种方法的各个步骤是：对未经处理的样品进行初步诊断调查;对处理溶液本身进行表征，以确定在处理过程中要监测的属性;确定处理后木材的主要物理特性的评价。在后者中，在暴露于一系列选定的温湿度条件下的尺寸稳定性系数和处理后固结剂的保留。这两个测量允许定义的“治疗的疗效”，con一个新的参数首次在这项工作中使用。它测量单位保留产品百分比的稳定能力，其值允许证明固化剂以最低的产品量稳定木材。相反，由于在所有严重降解的未处理样品中观察到严重变形和断裂，因此无法测量抗收缩效率（ASE），这是用于评价处理的最常用参数之一。(C)2009年Elsevier Masson SAS。All rights reserved.
The aim of the work is to set up a methodological approach to verify the effectiveness of the treatments of decayed waterlogged archaeological wood and to point out the proper thermo-hygrometric conditions for its preservation after treatment. The treatments were performed on wood samples of maritime pine (Pious pinuster Aiton), oak (Quercus sp. caducifolia), elm (Ulmus cf. minor) and strawberry tree (Arbutus unedo L.), obtained from stems pertaining to the original vegetation found in the excavation site of the Ancient Ships in Pisa (Italy), and dated from seventh century BC to second century AD The utilised products were: Polyethylene Glycols (PEG) of various molecular weights, a Polypropylene Glycol (PPG 425), Trehalose (alpha-D-glucopyranosyl-alpha-D-glucopyranoside), and their mixtures, and also a Hydroxypropylcellulose (Klucel). The main objective to be pursued by the treatments was considered the stabilisation of the original size and shape of samples. The various steps of this approach were: the execution of a preliminary diagnostic survey on untreated samples; the characterisation of treatment solutions 'as such' to establish the property to be monitored during the treatment; the evaluation of the main physical characteristics of wood after the treatment were determined. Among the latter, the coefficient of dimensional stability during the exposure to a series of selected thermo-hygrometric conditions and the retention of consolidants after the treatment. These two measurements allowed the definition of the 'efficacy of a treatment', con a new parameter firstly utilised in this work. It measures the stabilisation capability of the percent unit of retained product, and its value permits to put in evidence the consolidants that stabilise wood with the lowest amount of product. Conversely, it was not possible to measure the Anti-Shrink Efficiency (ASE), one of the most utilised parameters for the evaluation of treatments, because of the serious distortions and fractures observed in all the heavily degraded untreated samples. (C) 2009 Elsevier Masson SAS. All rights reserved.