Abstract
Because the core sampling from the structure is difficult, test hammer is commonly used as non-destructive inspection (test) method for determining the compressive strength. But presumption error is said to be large, and it is the present state of affaires that this test method is not yet completely established. Therefore, in this study the various influence factors to non-destructive testing using test hammer are examined through model test specimens, model concrete girders and old constructed buildings. These data are then analyzed collectively. Based on the analyzed data an inspection method using test hammer is proposed for the compressive strength of concrete in structures.
