ABSTRACT
Artificial stone construction is a combination of Tataki and building stones. Tataki is a kind of plaster which is composed of decomposed granite soil, quicklime, and seawater. Many of them had been constructed more than 100 years ago and they have been deteriorated. It's a problem how to repair them for future preservation. However, the specification of the construction method is unknown because few original documents. In this study, the target structure is the Doudo lumberyard. At first, we conducted the metric survey by means of photogrammetry using an UAV. In addition, strength measurement was carried out for the original Tataki in the lumberyard by using needle penetrometer. After that, we conducted laboratory tests to understand the characteristics of Tataki. As the results, Doudo lumberyard has been kept in good condition and the unconfined compression strength is from 1 to 2 N/mm2 for both original and newly formed Tataki.
