精密石材の岩石学的特徴と湿潤環境下での超微小変形の発生機構に関する考察

抄録

The precision stone, which is used for precision measurement and machining, is usually made from gabbro. Such a precision stone have to keep flat to a high accuracy, however, that flatness is changed with humidity. Here, we characterized the petrological and micro-structural properties of intact gabbro to use precision stone, and carried out deformation test under wet condition using three different samples in order to clarify the micro-deformation mechanism. As a result, the displacement caused by water is strongly related to nano-pore.