1. Applied Geotechnologies Group, Department of Materials Engineering, Applied Mechanics and Construction; University of Vigo; C.P. 36208 Vigo Spain
2. Department of Civil Engineering; ISISE, University of Minho; Azurém 4800-058 Guimarães Portugal
3. Applied Geotechnologies Group, Department of Natural Resources and Environmental Engineering; University of Vigo; C.P. 36310 Vigo Spain