Monday, November 13, 2006
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Protective Measures of Mural Painting against Fungi by Cooling of Tumulus Mound and its Simulation Analysis.
Takeshi Ishizaki1, M. Inuzuka1, S. Miura1, Magdi Khalil V1, and Masaru Mizoguchi2. (1) Tokyo Nat. Res. Inst. for Cultural Properties, 13-43 Ueno-Park, Taito-ku, 110-8713, Japan, (2) University of Tokyo, Bunkyo-ku, Tokyo, 113-8657, Japan
High humidity of the stone chamber of the Takamatsuzuka tumulus and high water content of its lime plaster wall have caused fungi to appear on the walls inside the stone chamber of Takamatuzuka tumulus. It was decided finally to take out the stones for the restoration of the paintings on the lime plaster walls. But as a tentative measure, it was decided to cool the stone chamber in order to reduce fungal activities. Five methods were proposed for this including sending cool air into the stone chamber. Among them, the method of installing cooling pipes on the mound and below the stone chamber was selected, because it allows uniform cooling and it does not damage the mound so severely. Undisturbed soil sample was obtained by boring and its thermal properties were measured. Based on these measurements, temperature changes were simulated by numerical simulation. After the cooling system was completed, the mound was started to cool in September 2005. The measured temperature profile corresponded well with the simulated results.