Testing the model of the rings of cement composites in the blast

Abstract

This paper deals with the description and evaluation of experimental results obtained by testing rings of underground structures under extreme loads – blast. Models rings were made at a scale of 1/20 of cementitious composites in the shape of a circular tunnel. The materials used were plain concrete, synthetic fiber reinforced concrete, and steel fiber reinforced concrete. Test specimens were made of rings, joined together and placed into the made groove. In each group, were placed 2 sensors. The article gives a measurement technique used, shock wave parameters, and the parameters evaluated from the image signals. The experimental results illustrate the attached annexes and graphical comparison of the materials used for underground structures.