Influence of the clay/cement ratio on the water durability of tuff-based mortars: mineralogical, microstructural, and mechanical correlations. - Feredj, Bouabdellah; Abou-Bekr, Nabil; Bencheikh, Mohamed; Boulekbache, Bensaid; Ait Atmane, Hassen; Safer, Omar (Geomechanics & Geoengineering, 2026)