Synergic effect of hydrated lime and guar gum treatments on the shear strength and retention behaviour of a pyroclastic soilTalenta Pitso, Agostino Walter Bruno, Giuseppe Pedone, Marianna Pirone and Domenico GallipoliE3S Web Conf., 642 (2025) 03031DOI: https://doi.org/10.1051/e3sconf/202564203031