Conservation Treatment, Deterioration Assessment and Petrography of the Hongjimun Ogansumun (Five-arched Floodgates) in Seoul

Abstract

The Hongjimun Ogansumun (Five-arched floodgates) is composed mainly of biotite granite, pink feldspar granite and granodiorite that are very similar with granitic rocks around the Seoul. Main damage in the floodgates was gray, yellow and predominantly white discoloration on the surface of stone blocks. All floodgates showed more discoloration in the wall than ceiling, and there were growing stalactite on the ceiling. Scientific analyses determined that the white discoloring substrates were mainly calcite. Therefore, conservation treatment was carried out to remove the substrates by using dry cleaning, high pressure cleaning and chemicals. The floodgates have been restored to good state, but it is still significantly necessary to install drainage on the top of the gates.

Suggestions of Stone Materials for Restoration of Gwanghwamun Woldae in Seoul Based on Lithological Study

“…pISSN 1225-7281 eISSN 2288-7962 자원환경지질, 제56권, 제6호, 647-659, 2023 (Caterina et al, 2004;Lee et al, 2005;2007;2010a;2010b;2018;2023;Barba, et al, 2009;Lee and Lee, 2009;Miriello et al, 2011;Kim et al, 2013a). 최근에는 손상된 석조문화유산의 보수와 복원 시 새로 보충되는 신석재 선정을 위한 산지연구가 활발히 수행되고 있다 (Lee et al, 2010c;2016;Jo et al, 2011;Park et al, 2015). (Kim et al, 2012;2013b;Jo et al, 2012;Lee et al, 2013;Jo and Lee, 2015;Park et al, 2019) 서울 일대의 흑운모화강암은 다양한 암상이 나타나는 것으로 확인되며, 서울에 분포하는 많은 석조문화유산에 사용되었다 (Jo et al, 2012;Kim et al, 2013b;Lee et al, 2013;Park et al, 2019) (J) X-ray diffraction patterns of the railing stones and quarry stones.…”

“…최근에는 손상된 석조문화유산의 보수와 복원 시 새로 보충되는 신석재 선정을 위한 산지연구가 활발히 수행되고 있다 (Lee et al, 2010c;2016;Jo et al, 2011;Park et al, 2015). (Kim et al, 2012;2013b;Jo et al, 2012;Lee et al, 2013;Jo and Lee, 2015;Park et al, 2019) 서울 일대의 흑운모화강암은 다양한 암상이 나타나는 것으로 확인되며, 서울에 분포하는 많은 석조문화유산에 사용되었다 (Jo et al, 2012;Kim et al, 2013b;Lee et al, 2013;Park et al, 2019) (J) X-ray diffraction patterns of the railing stones and quarry stones. Chl; chlorite, B; biotite, Am; amphibole.…”