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http://dx.doi.org/10.9719/EEG.2020.53.6.677

Characteristics of Salt Weathering and Environmental Variation on the Usuki Stone Buddha Statues in Oita, Japan  

Cho, Ji Hyun (Buyeo National Research Institute of Cultural Heritage)
Lee, Chan Hee (Department of Cultural Heritage Conservation Sciences, Kongju National University)
Publication Information
Economic and Environmental Geology / v.53, no.6, 2020 , pp. 677-685 More about this Journal
Abstract
The host rock of the Usuki Stone Buddha Statues is dark gray welded tuff involved the Aso-4 pyroclastic flow sediments. This Buddha Statues are processing chlorosis from rainfall flowing above and underground water which were urgently needed for conservation measurement. White precipitates, the main source of salt weathering, on the surface of the Buddha Statues are mainly consisted of thenardite, gypsum and dolomite. Extraction experiment result shows that thenardite was dissolved at the beginning of stirring and then redissolved after 4 hours, and gypsum was detected until stirring for 2 hours, and then dissolved after stirring for 4 hours. As a result of monitoring the microclimate environment for 11 months to determine the recrystallization environment of white precipitates, the phase transition between thenadite and mirabilite appears widely in spring, and is maintained in an aqueous solution due to high temperatures in summer and fall. In winter, mirabilite is shown the widest by decreasing temperature. Therefore we requires details monitoring for blocking water transfer port and solved humidity environment in shelter.
Keywords
Usuki Stone Buddha Statues; tuff; salt weathering; thenardite; microclimate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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