Municipal solid waste incineration plants produce considerable amounts of residues; the most part of them consists of incineration slags, which could be used as a construction, draining and stabilizing material in view of landfilling. Laboratory tests were carried out in order to investigate the geotechnical behaviour of four slags, coming from different italian incineration plats. In particular hydraulic and mechanical properties of the slags were evaluated by means of falling-head permeability and multistage consolidated-drained triaxial tests. Testing specimens were reconstructed in laboratory, compacting them with medium and low compaction energies
