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首页> 外文期刊>Materials Characterization >Mineralogical study of the deterioration of granite stones of two Portuguese churches and characterization of the salt solutions in the porous network by the presence of diatoms
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Mineralogical study of the deterioration of granite stones of two Portuguese churches and characterization of the salt solutions in the porous network by the presence of diatoms

机译：矿物学研究的两个葡萄牙教会的花岗岩石头的退化和硅藻土的存在表征多孔网络中的盐溶液

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摘要

Two Portuguese churches were built with stones of different types of two-mica fine to coarse grained granites. The stones in both monuments were previously submitted to a natural weathering process in the quarries leading to a homogeneous and very well interconnected porous network composed of very thin fissures, allowing a fast capillary transfer of rain water and salt solutions. Therefore, the stones presently exhibit several types of stone decay. A mineralogical study of the deteriorations was carried out in the two churches that permitted the identification of several minerals of soluble salts responsible for stone decay. Some forms of diatoms have been identified in samples of deteriorated stones in both monuments. Several ions in the salt solutions present in the porous networks of the granites, which are in conformity with the minerals of soluble salts associated with the deterioration of the granite, permit the development of several forms of diatoms.
机译：两座葡萄牙教堂都是用不同类型的两云母细到粗粒花岗岩建造的。这两座纪念碑中的石头以前都在采石场进行了自然风化处理，从而形成了由非常细的裂缝组成的均匀且相互连接的多孔网络，从而可以快速毛细管传输雨水和盐溶液。因此，石头目前表现出几种类型的石头腐烂。在这两个教堂中进行了矿物学研究，确定了导致石块腐烂的几种可溶性盐矿物。在两个纪念碑中的退化石头样本中都发现了某些形式的硅藻。花岗岩多孔网络中存在的盐溶液中的几种离子与与花岗岩变质相关的可溶性盐类矿物一致，可形成多种形式的硅藻。

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