Relationship between Uni-axial Compressive Strength and Start of Use for Building Stones as Geological Material in Japan

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  • FUJII Yukiyasu
    Department of Civil Engineering, Faculty of Science and Technology, Meijo University

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  • 地質材料としての石材の一軸圧縮強度と利用時期との関係について
  • チシツ ザイリョウ ト シテ ノ セキザイ ノ イチジク アッシュク キョウド ト リヨウ ジキ ト ノ カンケイ ニ ツイテ

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<p>In Japan where many earthquakes occur, there are few historical stone structures compared to the countries located in the craton. However, various kinds of rocks have been produced as stone materials or building stones in various places all over the nation, according to the usage pattern of each region or each era. In this paper, five stone materials, Ohya, Kimachi, Tago, Inada and Komatsu, will be explained for the types of rocks and the geological background. In addition, the uniaxial compressive strength, which is related to the ease of collecting and processing stones, and the time when the stones were first used were investigated by articles. Ohya of tuff, Kimachi and Tago of sandstone show the strength of less than 50 MPa. These sedimentary rocks have been used more than 1000 years since tumulus period. On the other hand, Inada of granite and Komatsu of andesite or rhyolite show the strength of more than 100 MPa. Those igneous rocks have been used less than 1000 years since Heian period. In Japan imported building stones have been used many cases these days. However, there are some quarries that are still in operation for the stone materials picked up in this research. I hope they can be continued as a local industry.</p>

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