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http://dx.doi.org/10.9719/EEG.2021.54.6.671

Interpretation of Firing Temperature and Thermal Deformation of Roof Tiles from Ancient Tombs of Seokchon-dong in Seoul, Korea  

Jin, Hong Ju (Conservation Science Division, National Research Institute of Cultural Heritage)
Jang, Sungyoon (Cultural Heritage Conservation Science Center, National Research Institute of Cultural Heritage)
Lee, Myeong Seong (Conservation Science Division, National Research Institute of Cultural Heritage)
Publication Information
Economic and Environmental Geology / v.54, no.6, 2021 , pp. 671-687 More about this Journal
Abstract
This study investigated the firing temperature and thermal deformation process of roof tiles excavated from the connected stone-mound tomb in Seokchon-dong, Seoul, based on mineralogical and physical properties. A large number of roof tiles were excavated from the tomb site and some roof tiles were deformed by heat and were fired in uneven conditions. The colors of original roof tiles and their cores are mostly yellowish-brown, with high water absorption over 12%, containing fine-grained textures and some minerals such as quartz, feldspars, amphibole, and mica. It is estimated that the original roof tiles were fired below 900℃ in oxidation condition, showing loose matrices and mica layers by scanning electron microscopy. However, deformed roof tiles have the uneven surface color of reddish-brown and bluish-gray, and those cross-sections have sandwich structures in which dense reddish-brown surface and porous grey core coexist. They contained mullite and hercynite, so it was estimated to have been fired over 1,000℃, with 0.81~11% water absorption. In some samples, bloating pores by overfiring were observed, which means that they were fired at more than 1,200℃. In addition, the refirng experiments that the original roof tile was fired between 800℃ and 1,200℃ were carried out to investigate the physical and mineralogical properties of roof tiles compared to deformed ones. As a result, the water absorption decreased rapidly and the mineral phase started to change over 1,000℃. As the temperature gradually rises, the matrices are partially melted and recrystallized, resulting in similar thermal characteristics of deformed roof tiles. Therefore, the roof tiles from ancient tombs in Seokchon-dong seem to experience the secondary high temperature of 1,000 to 1,200℃ under uneven firing conditions, resulting in deformation characteristics such as shape transformation and mineral phase transition. It is considered to have been related to cremation rituals at the tombs of Seockchon-dong during the Baekje period.
Keywords
ancient tombs in Seokchon-dong; roof tile; firing temperature; refiring experiment; thermal deformation;
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Times Cited By KSCI : 3  (Citation Analysis)
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1 Han, S.M., Shin, D.Y. and Kang, S.K. (1998) Preparation for Porous Ceramics Using Low Grade Clay. Journal of the Korean Ceramic Society, v.35, p.575-582. (in Korean with English abstract)
2 Park, J.Y., Kim, Y.T., Lee, K.G., Kang, S.G. and Kim, J.H. (2005) The mechanism of black core formation. Journal of the Korean Crystal Growth and Crystal Technology, v.15, p.208-215.
3 Kim, R.H., Jung, J. and Lee, C.H. (2013) Clay Source Interpretation and Making Characteristics of Proto-Three Kingdoms Period Potteries from Cheonan and Asan in Korea: Focusing on the Bakjimeure Site. Journal of Conservation Science, v.29, p.171-185. (in Korean with English abstract). doi: 10.12654/JCS.2013.29.2.08   DOI
4 Nodari, L., Maritan, L., Mazzoli, C. and Russo, U. (2004) Sandwich structures in the Etruscan-Padan type pottery. Applied Clay Science, v.27, p.119-128. doi: 10.1016/j.clay.2004.03.003   DOI
5 Lee, C.H. and Kim R.H. (2012) Achievements and Tasks of Compositional Analysis for Jar coffins. The 5th Ancient Jar Coffins International Academic Symposium. Naju National Research Institute of Cultural Heritage. (in Korean)
6 Lee, M.S., Chun, Y.G. and Kim, J. (2016) Study for Selection of Replica Stone of the Stele for Buddhist Monk Wongjong at Yeoju Godalsa Temple Site using Magnetic Susceptibility. Journal of the Petrological Society of Korea, v.25, p.299-310. (in Korean with English abstract). doi: 10.7854/JPSK.2016.25.3.299   DOI
7 Maritan, L., Nodari, L., Mazzoli, C., Milano, A. and Russo, U. (2006) Influence of firing conditions on ceramic products: Experimental study on clay rich in organic matter. Applied Clay Science, v.31, p.1-15. doi: 10.1016/j.clay.2005.08.007   DOI
8 Quinn, P.S. (2013) Ceramic Petrography: The Interpretation of Archaeological Pottery & Related Artefacts in Thin Section. Oxford, p.97-100.
9 Seoul Baekje Museum (2019) Excavation Report on the Connected Stone-mound Tomb North of Seokchon-dong Ancient Tomb No.1, Seoul. Seoul Baekje Museum, p.39-327. (in Korean)
10 Seoul Baekje Museum (2020) Baekje's Roral Castle and Tomb Complex. Seoul Baekje Museum, p.143-145. (in Korean)
11 Sinopoli, C.M. (1991) Approaches to Archaeological Ceramics. Lee, S.J.(translator). Gyeongnam Institute for Archaeology.
12 Whitbread, I. (1995) Greek Transport Amphorae-Petrological and Archaeological Study. The British School at Athens, Fitch Laboratory Occasional Paper, 4, p.1-453.
13 Maniatis, Y. and Tite, M.S. (1981) Technological Examination of Neolithic-Bronze Age Pottery from Central and Southeast Europe and from Near East. Journal of Archaeological Science, v.8, p.59-76. doi: 10.1016/0305-4403(81)90012-1   DOI
14 Chatfield, M. (2010) Tracing firing technology through clay properties in Cuzco, Peru. Journal of Archaeological Science. v.37, p.727-736. doi: 10.1016/j.jas.2009.11.003   DOI
15 Roh, S.K. and Ham, E.G. (2010) A Study on Characteristics of Roof 'Jucsim' Structure Combustion Real Scale Fire Test on Wooden Structure Heritage Building. J. of Korean Institute of Fire Sci. & Eng., v.24, p.95-102. (in Korean with English abstract)
16 Choi, J.K. (2001) Tumulis of Gyeoseong in Changnyeong. Gyeongnam Institute for Archaeology, p.437-444. (in Korean)
17 Jang, S. and Lee, C.H. (2014) Mineralogical Study on Interpretation of Firing Temperature of Ancient Bricks: Focused on the Bricks from the Songsanri Tomb Complex. Journal of Conservation Science, v.30, p.395-407. (in Korean with English abstract). doi: 10.12654/JCS.2014.30.4.08   DOI
18 Jo, Y.H., Lee, C.H., Yoo, J.H., Kang, M.K. and Kim, D.M. (2012) Petrological Classification and Provenance Interpretation of the Sungnyemun Stone Block Foundation, Korea. MUNHWAJAE Korean Journal of Cultural Heritage Studies, v.45, p.174-193. (in Korean with English abstract). doi: 10.22755/kjchs.2012.45.3.174   DOI
19 Kim, R.H. (2012) Material Characteristics and Clay Source Interpretation of U-shaped Jar Coffins from the Ancient Tombs in the Yeongsan River Basin, Korea. Ph.D. Dissertation, Kongju University, p.280-293. (in Korean with English abstract).
20 Han, M.S., Lee, M.H. and Ahn, G.S. (2019) Firing Temperature Analysis of Walls and Roof Tiles from the Jeseoksa Dump-Site, Excavation Report on the Jeseoksa Dump-SiteIII. Buyeo Research Institute of Cultural Heritage, p.248-259. (in Korean)