Non-destructive Testing of Materials Used for Protective Structures Built from High Performance Fibre Reinforced Concrete after the Contact Explosion Loading

摘要

The article deals with the use of the passage ultrasonic method for diagnosis of discontinuities, which result from the loading of the protective structure elements made from High Performance Fibre Reinforced Concrete (HPFRC) by PlNp 10 explosion. Within the research on new materials and structures suitable for temporary protective structures, the HPFRC material was tested. This material was chosen for testing due to its great mechanical and physical properties such as compressive strength, tensile strength and resistance to dynamic loads. The article compares material characteristics of the unreinforced concrete, steel fibre concrete (fibre reinforced concrete) and HPFRC on the basis of materials tested by using the passage ultrasonic method after the explosion. This method is one of the possible methods used for the non-destructive evaluation of experiments on protective structures. The requirements for a suitable method are low demands on instrumentation and operator's experience. Contrary to these requirements, the searching method should provide reliable data about the testing of the protective structures.