It is shown that the fracture properties are determined by materials strength before tufftride process and by materials toughness after tufftride process.
It is proved that the pressmark of tooth root, the state of carbide and remanentelements in the material have different effects on the toughness of POwer hacksaw blades.
Results showed that the flexual strength and the flexual toughness index of UHPC become more than 2 times and 10 times respectively of those 0f the matrix concrete by the reinforcement of fibers.