Nippon Institute of Technology, Faculty of Engineering, Department of Architecture


The strength of a masonry wall against seismic disturbances depends not only on the strength of each masonry unit and joint material but also on the bonding force between blocks and joint materials.
In recent years, the performance of masonry units has been improving. For this reason, experimenting on bonding performance, which also represents the capacity to transmit stress between units, and gaining better understanding are critical in selecting the right joint material for the strength of masonry units being used.
The purpose of this study is to determine the stress transmission property of joints made of various materials using a method that focuses on the ratio between the normal stress and shear stress that are caused on the joining surface.

Key words
Concrete block, Reinforced fully grouted concrete masonry, Grout concrete, Joint Material, Normal stress/Shear stress ratio, Superposed strength