In tunnel linings, time and safety are the two most important parameters. The ductility provided by Macro Beton prevents sudden collapses and accelerates the project by eliminating all reinforcement labor. Since steel reinforcements under the influence of groundwater can cause section loss as a result of reactions, the reinforcement system that does not undergo corrosion prolongs the life of the concrete.
Fire resistance is the most important safety factor in tunnels. Since Macro Beton synthetic fibers do not have thermal conductivity, they do not increase the temperature of the concrete like steel wires or reinforcements in case of fire. KraTos Macro preserves the structural properties of the tunnel lining after fire with its high melting temperature compared to other polypropylene fibers.