In revision total hip replacement, bone loss can be managed by impacting porous bone chips. In order to guarantee sufficient mechanical strength, the bone chips have to be compacted. The aim of this study was to determine in an in vitro simulation whether the use of a pneumatic hammer leads to higher primary stability than manual impaction. Bone mass characteristics were measured by force and d...

The mechanical strength is a fundamental characteristic of rock masses that can be empirically related to number properties and the likelihood instability phenomena. Direct field acquisition information on tall cliffs, however, challenging, particularly in coastal alpine environments. Here, we propose method evaluate compressive blocks by monitoring their thermal behaviour over 24-h period infr...

Abstract In the present work we discuss results of a number Schmidt hammer tests (total impacts N > 2,400) that were performed in situ on rock outcrops different lithology (marl, calcareous marl, limestone, sandstone, quartz sandstone and rhyolite) occur Italy. Firstly, specific field procedure to choose reference value rebound index adopted calculate UCS intact is suggested. A relationship ...

Nondestructive tests, commonly employed in rock mechanics, estimate mechanical parameters without affecting the rocks situ properties. This study evaluates non-destructive tests (ultrasonic pulse velocity and Schmidt hammer) for forecasting strength physical properties of used rocks. Weathering grades moisture content are provided as variables that produce variances both tests. The coefficient ...

Non-destructive testing (NDT) methods are important alternatives when destructive tests are not feasible to examine the in situ concrete properties without damaging the structure. The rebound hammer test and the ultrasonic pulse velocity test are two popular NDT methods to examine the properties of concrete. The rebound of the hammer depends on the hardness of the test specimen and ultrasonic p...