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Material Analysis and Deterioration Evaluation of Foundation Stones and Holy Stone Relics in Myeongdongseongdang Cathedral, Korea

명동성당 석조성물 및 기초석의 재질분석과 손상도 평가

  • Kim, Jiyoung (Department of Cultural Heritage Conservation Sciences, Kongju National University) ;
  • Ha, Eun Young (Department of Cultural Heritage Conservation Sciences, Kongju National University) ;
  • Lee, Myeong Seong (Conservation Science Division, National Research Institute of Cultural Heritage) ;
  • Lee, Chan Hee (Department of Cultural Heritage Conservation Sciences, Kongju National University)
  • 김지영 (공주대학교 문화재보존과학과) ;
  • 하은영 (공주대학교 문화재보존과학과) ;
  • 이명성 (국립문화재연구소 보존과학연구실) ;
  • 이찬희 (공주대학교 문화재보존과학과)
  • Received : 2012.07.28
  • Accepted : 2012.12.03
  • Published : 2012.12.20

Abstract

The Myeongdongseongdang Cathedral, which was designated as Historic Site No. 258 in Korea, is a representative cathedral of Korean Catholic church designed by a French priest Eugene-Jean Georges Coste and completed in 1898. It is a Gothic-styled architecture constructed with bricks and stones. Lithological and mineralogical analyses determined that holy stone relics were made of marble and granite, and foundation stones are of pink feldspar granite. Deterioration mapping and ultrasonic measurement revealed main weathering and damage were exfoliation (40%) and black discoloration (37%) in the holy water basin, and exfoliation (6%) and discoloration (46%) in the exterior foundation stones. Ultrasonic velocity of the stones were calculated as 3,525m/s in the holy water basin and 2,795m/s in the exterior stones that indicated these stones were sorted into moderately to highly weathered rock. This was resulted from moisture and atmospheric pollutants around the cathedral.

사적 제258호로 지정된 명동성당은 프랑스인 코스트 신부가 설계하여 1898년에 완성한 한국 가톨릭교회의 대표적인 성당 건축물이자 근대문화유산이다. 이 성당은 화강암 기단 위에 벽돌을 쌓아 축조한 고딕 양식의 건축물이며, 내외부에는 대리암 및 화강암으로 이루어진 성물과 기초석이 다수 존재한다. 암석광물학적 분석 결과, 석조성물은 주로 대리암과 화강암으로 이루어져 있으며, 기초석은 홍장석화강암으로 구성되어 있음을 확인하였다. 손상지도와 초음파 속도를 바탕으로 풍화도를 평가한 결과, 화강암으로 이루어진 성수반의 박리박락(40%)과 흑색변색(37%), 외부 기초석의 박리박락(6%)과 변색(46%)이 주된 문제점으로 나타났다. 한편 평균 초음파속도는 성수반에서 3,525m/s, 외부 기초석에서 2,795m/s로 산출되어 중간 풍화단계에서 심한 풍화단계에 속하는 것으로 분석되었다. 이러한 높은 손상도와 물성저하는 수분과 대기오염물에 의한 물리화학적 풍화의 결과로 해석된다.

Keywords

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