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http://dx.doi.org/10.9727/jmsk.2018.31.4.267

Mineralogical and Physical Properties of Lime Plaster used in Wall Repair in Temple of Bagan, Myanmar  

Ahn, Sunah (Restoration Technology Division, National Research Institute of Cultural Heritage)
Kim, Eunkyung (Restoration Technology Division, National Research Institute of Cultural Heritage)
Nam, Byeongjik (Restoration Technology Division, National Research Institute of Cultural Heritage)
Hlaing, Chaw Su Su (Department of Archaeology and National Museum, Ministry of Religious Affairs and Culture)
Kang, Soyeong (Restoration Technology Division, National Research Institute of Cultural Heritage)
Publication Information
Journal of the Mineralogical Society of Korea / v.31, no.4, 2018 , pp. 267-275 More about this Journal
Abstract
The purposes of this study were to analyze the mineralogical characteristics of slaked lime used for wall repair of traditional buildings in Bagan, Myanmar and to evaluate the physical properties of lime plaster produced by the same method as Bagan region. In the X-ray diffraction and thermal analysis of the Myanmar slaked lime, portlandite ($Ca(OH)_2$) and brucite ($Mg(OH)_2$) were detected as main constituent minerals, and a carbonate rock mainly composed of dolomite ($CaMg(CO_3)_2$) minerals may be used as a raw material to make slaked lime. The field-emission scanning electron microscope analysis showed that the Myanmar slaked lime was composed of irregularly shaped crystals of $0.5{\mu}m$ or larger and a small amount of $0.1{\mu}m$ of plate - like crystals. The size and uniformity of crystals in Myanmar lime is different from that of Korea slaked lime. This may be attributed to the effect of the mineral composition and the lime hydration method of Myanmar, which produces slurry by immersing the burnt lime in excess water for a long period of time. The compressive strength of the lime plaster in Myanmar resulted in a mean value of $1.13N/mm^2$ for the specimens cured for 28 days. The strength of the specimens with Bale juice was $1.03N/mm^2$, respectively. The lime is an air setting material that exhibits strength through long carbonation process. Therefore, it is necessary to evaluate physical properties according to curing period through long-term curing over 28 days in the future.
Keywords
Myanmar; lime; plaster; calcite; brucite;
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