This unique testing is currently taking place in the Zagreb laboratory of Institut IGH, d. d.
Our laboratory for materials is equipped with a special device that enables testing the energy absorption capacity of fibre-reinforced sprayed concrete according to standard EN 14488-5.
Testing is carried out as part of the selection of correct mixtures of fibre-reinforced sprayed concrete that will meet all the conditions prescribed by our designers for the primary lining during the construction of the second tube of the Učka tunnel.
During the test, the following is continuously monitored:
the load on the slab
the vertical displacement that occurs due to the load
From the load-deformation diagram, the amount of absorbed energy is calculated as a function of displacement.