Godts Sebastiaan, Orr Scott Allan, Steiger Michael, Stahlbuhk Amelie, De Kock Tim, Desarnaud Julie, De Clercq Hilde, Cnudde Veerle
Monuments Lab, Royal Institute for Cultural Heritage (KIK-IRPA), Brussels, Belgium.
Antwerp Cultural Heritage Sciences, ARCHES, University of Antwerp, Antwerp, Belgium.
Sci Rep. 2023 Aug 16;13(1):13306. doi: 10.1038/s41598-023-40590-y.
Salt related weathering of stones has been attributed to pressures exerted by repeated cycles of crystallization within pores. Relative Humidity (RH) is a key driver for dissolution and crystallization processes. Despite the prevalence of salt mixtures in natural environments, most experimental work has focused on single salts. Thus, the identification of salt mixture composition and their behavior is necessary to understand weathering. Thermodynamic calculations are used to analyze several thousand realistic salt mixtures found in weathered stone. We identify two common mixture types and their behavior. From at least 85 salt species theoretically present, 14 common salts are identified that occur most frequently and their critical RH points are discussed. These findings have wide-reaching implications for understanding salt weathering processes and informing the design of experimental stone weathering research.
石材的盐相关风化归因于孔隙内反复结晶循环所施加的压力。相对湿度（RH）是溶解和结晶过程的关键驱动因素。尽管自然环境中盐混合物普遍存在，但大多数实验工作都集中在单一盐类上。因此，确定盐混合物的组成及其行为对于理解风化过程是必要的。热力学计算用于分析风化石材中发现的数千种实际盐混合物。我们确定了两种常见的混合物类型及其行为。从理论上存在的至少85种盐类中，识别出14种最常出现的常见盐类，并讨论了它们的临界相对湿度点。这些发现对于理解盐风化过程以及为实验性石材风化研究的设计提供信息具有广泛的意义。
