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http://dx.doi.org/10.12654/JCS.2012.28.4.329

Weathering Characteristics according to Seawater Immersion of the Magai Wareiishi Jizo (Buddhist Statue Carved on Rock Surface) in Hiroshima, Japan  

Lee, Sun Myung (Conservation Science Division, National Research Institute of Cultural Heritage)
Lee, Myeong Seong (Conservation Science Division, National Research Institute of Cultural Heritage)
Chun, Yu Gun (Conservation Science Division, National Research Institute of Cultural Heritage)
Lee, Jae Man (Conservation Science Division, National Research Institute of Cultural Heritage)
Morii, Masayuki (Center for Conservation Science and Restoration Techniques, National Research Institute for Cultural Properties)
Publication Information
Journal of Conservation Science / v.28, no.4, 2012 , pp. 329-341 More about this Journal
Abstract
Magai Wareiishi Jizo (Buddhist statue carved on rock surface) is close to shoreline and a part of rock block is periodically immersed by seawater. Rock material of the Wareiishi-jizo statue is composed mainly of medium or coarse-grained biotite granite and very durable. However, physical properties of the rock have been changed according to the complex interactions of the salt solution and surrounding environment. Exfoliation of the rock surface is a serious condition by salt crystallization. Exfoliation (14.6%) is concentrated on the upper part of the rock block with mainly boundary of seawater as the center. On the other hand, lower part of the rock block show black layers by contaminants deposition. In addition, brown discoloration and biological contaminants is overlapped. Rock surface show high discoloration rate of 50.5% (black discoloration, 29.2% > yellow discoloration, 14.1% > brown discoloration, 4.4% > green discoloration, 2.9%). Upper part of the rock block had a lot of change in the physical properties than lower part that is immersed by seawater. In particular, surface properties of the rock block was very weak state at the boundary surface of seawater permeation.
Keywords
Magai Wareiishi Jizo; Biotite granite; Seawater immersion; Salt weathering; Exfoliation; Blackening; Weathering characteristics;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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