**4. Conclusions**

Salt water reduces the time that the mixture is in contact with frozen water, which, as corroborated by the results, is one of the most harmful effects for the mixture.

When the bituminous mixture is subjected to freeze–thaw cycles, salt water has a protective effect on the specimens that remain submerged in it. The salt in the water protects the aggregate-binder adhesive, maintains the mechanical strength and increases the number of load cycles for any strain range.

The results of the Wheel Track Slope and the Rut Deep for reference mixtures and those that remained outdoors for one year are suitable for most climates zones and traffic.

The results of the Fatigue Test and Dynamic Modulus Test have no significant variation between the different series analysed.

The results show that, although the temperature has an injurious effect on the mechanical properties, the specimens submerged in salt water obtain better results than their analogs that are submerged in distilled water.

**Author Contributions:** Conceptualization, L.J.-G., Á.V.-Z. and M.Á.C.-P.; methodology, L.J.-G.; software, L.J.-G. and E.T.-L.-Z.; validation, L.J.-G., Á.V.-Z. and M.Á.C.-P.; formal analysis, L.J.-G.; investigation, L.J.-G; resources, L.J.-G.; data curation, L.J.-G. and E.T.-L.-Z.; writing—original draft preparation, L.J.-G.; writing—review and editing, L.J.-G., Á.V.-Z. and M.Á.C.-P.; supervision, L.J.-G., Á.V.-Z. and M.Á.C.-P. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research received no external funding

**Conflicts of Interest:** The authors declare no conflict of interest.
