Adapted ageing tests for the evaluation of alabaster used in the restoration of Bishop’s Palace of Tarazona

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2020-03-26 DOI:10.3989/mc.2020.08619

R. Bustamante, P. Vázquez, P. Rodríguez-Monteverde, J. Monjo

引用次数: 3

Abstract

The advanced condition of deterioration of the column’s bases of the courtyard of the Bishop’s Palace of Tarazona (Spain) built in the middle of 16th century required its restoration with Aragonese alabaster. Thus, adapted ageing tests were developed to simulate the environmental conditions in which the stones were and will be exposed. These tests were thermal fatigue by temperature variations, acid rain and water stagnation by immersion tests and a combination of both agents of decay. The results indicated that alabaster did not experimented deformation after thermal fatigue but a progressive dehydration to bassanite. This process entailed an increase of porosity and consequently a loss of structural properties. The dissolution was measured as a lineal weight and volume loss while porosity and capillary uptake remained stable. The conclusions of this study establish the importance of restoration protocols to maintain the alabaster integrity when used and exposed to rainwater and insolation.

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塔拉佐纳主教宫修复中使用的雪花石膏的适应性老化测试

建于16世纪中期的塔拉佐纳（西班牙）主教宫庭院柱基恶化的严重状况要求用阿拉贡雪花石膏修复。因此，开发了适应性老化测试，以模拟石头曾经和将要暴露的环境条件。这些试验是由温度变化引起的热疲劳、由浸泡试验引起的酸雨和滞水以及两种衰变剂的组合引起的。结果表明，雪花石膏在热疲劳后没有发生变形，而是逐渐脱水为蓝晶石。这一过程导致孔隙率增加，从而导致结构性能损失。溶解以线性重量和体积损失来测量，同时孔隙率和毛细管吸收保持稳定。这项研究的结论确立了修复方案的重要性，以在使用和暴露于雨水和阳光下时保持雪花石膏的完整性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.