TENZAN SEKIZAI CO

Tenzan Stone is made of granodiorite which is classified as the material between granite and diorite... We evaluated the bending strength for Tenzan Stone at the Industrial Technology Center of Nagasaki in compliance with JIS A 5411. We have measured the bending strength for characteristic angles of quartz crystal grain whose definition is shown in the figure. The bending strength is highest for transverse direction to the vertical side of the the grain, while is smallest for -45 degree direction to the vertical side of the grain. We found that the bending strength of "plain" Tenzan Stone is more than 20 [N/mm2] even for the weakest direction during the experiments. We also found that the bending strength for the weak angle becomes stronger and has less variation with coating epoxy resin sealer on the back side... Tenzan Stone is made of the same granodiorite as Asuka-ishi, and is the only "Waseki" stone having the characteristics of both remarkable hardness and very low water..

Also known as: Tenzan Sekizai Co LTD, Tenzan Stone, Tenzan Stone Company

Primary location: Saga Japan