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http://dx.doi.org/10.12654/JCS.2021.37.5.01

Analysis on Material Characteristics of Restored Areas with Mortar and Basis of Surface Deterioration on the Stupa of State Preceptor Jigwang from Beopchensaji Temple Site in Wonju, Korea  

Chae, Seung A (Conservation Sciences Center, National Research Institute of Cultural Heritage)
Cho, Ha Jin (Conservation Sciences Center, National Research Institute of Cultural Heritage)
Lee, Tae Jong (Conservation Sciences Center, National Research Institute of Cultural Heritage)
Publication Information
Journal of Conservation Science / v.37, no.5, 2021 , pp. 411-425 More about this Journal
Abstract
The Stupa of State Preceptor Jigwang from Beopcheonsa Temple Site in Wonju (National Treasure) is a representative stupa of the Goryeo Dynasty, with outstanding Buddhist carvings and splendid patterns, clearly indicating its honoree and year of construction. However, it was destroyed by bombing during the Korean War (1950-1953) and repaired and restored with cement and reinforcing bars in 1957. The surface condition of the original stone shows long-term deterioration due to the m ortar used in past restorations. In order to identify the exact causes of deterioration, the m ortar and surface contaminants on the original stone were analyzed. Portlandite, calcite, ettringite, and gypsum from the mortar were identified, and its ongoing deterioration was observed through pH measurements and the neutralization reaction test. Analysis of surface contaminants identified calcite and gypsum, both poorly water-soluble substances, and their growth in volume among rock-forming minerals was observed by microscopy. Based on those results, semi-quantitative analysis of Ca and S contents significantly influencing the formation of salt crystals was conducted using P-XRF to analyze the basis of surface deterioration, and cross-validation was performed by comparing the body stone affected by the mortar and the upper stylobate stone unaffected by the mortar. Results indicate that the elements are directly involved in the surface deterioration of the body stone.
Keywords
Stupa of the State Preceptor Jigwang; Mortar; Surface contaminants; Surface deterioration;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 Chun, Y.G., Lee, M.S., Kim, Y., Lee, S.M. and Lim, B.A., 2016, Forming process of surface contaminants on ten-story stone pagoda of Wongaksa temple, Seoul. Journal of Conservation Science, 32, 365-375. (in Korean with English abstract)   DOI
2 Cultural Heritage Conservation Science Center, 2018, Report of conservation and restoration of State Preceptor Jigwang Stupa from Beopcheonsa temple Site in Wonju. 2, 83-92. (in Korean)
3 Cultural Heritage Conservation Science Center, 2017, Report of conservation and restoration of State Preceptor Jigwang Stupa from Beopcheonsa temple Site in Wonju. 1, 54-141. (in Korean)
4 Jang, S.Y., Nam, B.J., Park, D.W., Kang, H.M., and Jung, Y.H., 2009, A study on the soluble salt and deterioration of ceramics from Taean Shipwreck. Conservation Studies, 30, 189-202. (in English abstract)
5 National Research Institute of Cultural Heritage, 2011, Cleaning and Surface Contaminant of Stone Cultural Heritage, 8-11. (in Korean)
6 Do, J.Y., 2003, Characteristics and origin of salts in the black surface layer of stone monuments. Journal of Conservation Science, 12(1), 15-25. (in Korean with English abstract)
7 Lee, M.H., Chun, Y.G., Lee, M.S., 2013, Deterioration mechanism interpretation and surface contaminant analysis of the five-storied stone pagoda in Tapriri, Uiseong. Economic and Environmental Geology, 46(5), 445-453. (in Korean with English abstract)   DOI
8 Lee, T.J., Cho, H.J., Park, H.J. and Chae, S.A., 2018, The condition evaluation of mortar parts of Stupa of State Preceptor Jigwang from Wonju Beopcheonsa temple site by half cell potential measurement, Journal of Conservation Science, 34(6), 503-515. (in Korean with English abstract)
9 Winkler, E.M., 1994, Stone in architecture, 3ed., Springer-Verlag, Germany, 166.
10 Kim, D.G., Kim, S.S., Lee, S.T., and Kim, J.P., 2006, The method of durability increase on the concrete structure considering chemical attack. Magazine of the Korea Concrete Institute, 18(4), 49-56.
11 Rijniers Lourens Albert, 2004, 'Salt crystallization in porous materials: and NMR study', Ph.D. research at Eindheven University of Technology.