Abstract Uniaxial Compressive Strength (UCS) is a key indicator of the mechanical properties rock, particularly in diagnostic and restoration phases when stones are employed as construction material. In historical buildings, it important to determine UCS values without utilizing tests that involve destructive rock sampling. To estimate UCS, non-destructive techniques, such ultrasonic pulse velo...

Original scientific paper In the pipelines of water supply systems, the water hammer phenomenon often arises during rapid unsteady developments. Pipelines are mostly protected using an air vessel, which is designed by means of equations for oscillations of water mass. In this study, an analysis is made of the impact of pressure increases caused by water hammer on pressure variations in pipeline...

In this paper, the non-destructive testing methods are analyzed in view of their usability in evalulation of the interlocking paving blocks’ compressive strength. Ultrasonic pulse method and impact method (Schmidt impact hammers) were chosen for testing. Testing methodology and way of the results processing considering requests of the national and European standards are described there. In addi...

Introduction: This study aims to determine the amount of hand-arm vibration transmitted from heavy electric destruction tools and the effect of using chisel with different lengths and shapes when demolishing concrete surfaces. Material and Methods: To evaluate the magnitude of hand-arm vibration on the left and right handles of two powerful electric demolition hammers commonly applied in Irani...

The chert gravels are a by-product of sand mining in the south Israel; reserves amount to tens millions tons and continue grow. attempts their comminution for production aggregates by conventional mechanical methods have not yet been successful due high abrasiveness, as well flaky form fracturing. This study was motivated need find an alternative method rock that would ensure aggregate line wit...