This study revealed the fundamental properties of wall clays, which were used in two mud wall storehouses, Dozoh. in Wajima. Noto. These Dozoh were subjected to the destructive earthquake occurred in March 25, 2007. Some of the test samples were taken away from a Dozoh which was constructed in the end of the Edo period and was seriously damaged by the earthquake. The other samples were newly excavated from the area around there and then one of them was used to repair the clay wall of the other Dozoh whose framework was slightly injured. It was found that the particle size of the wall clay used for the restoration of the Dozoh was smaller and its compressive strength was greater than those of the clay used in the other ancient one.
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