Quid magis est saxo durum, quid mollius unda? Dura tamen molli saxa cavantur aqua.

Publio Ovidio Nasone (43 a.C. - 18 d.C.) - Ars Amatoria, Liber I

Laboratory

Presently the R&D activity of AQUAVIS is developed in the premises of DICAAR, Laboratory of Cutting and Excavation Technologies, at the University of Cagliari on the basis of a formal agreement of joint co-operation.

The equipment and instrumentation facilities available in the laboratory for the development of the research activity on waterjet applications involve:

  • An equipment for deep slotting of rocks including: a lance with oscillating nozzle, a movable block supporting platform and a Hammelmann high pressure pump (54 l/min at 250 MPa).
  • A system for hard materials cutting with abrasive jets consisting of a slurry collection vessel, a X-Y nozzle driving device, the Hammelmann pump working at 70 MPa and a DIAJet equipment for the preparation of the premixed abrasive suspension.
  • A diesel powered KAMAT high pressure pump (100 l/min at 100 MPa)
  • A small power       Pratissoli  plunger pump (25 l/min at 70 MPa).
  • An integrated       Tecnocut system for cutting a wide variety of materials from soft to hard ones, using either plain or abrasive injection jets, including a numerically controlled X-Y working table, an intensifier ultrahigh pressure pump (50 kW at 400 MPa), a pneumatic abrasive feeding system.
  • A device for selective disintegration tests of materials having a planar shape and a composite layered structure.
  • An experimental equipment for rock excavation tests using waterjet-assisted mechanical tools
  • A machine for waterjet- assisted mineral or coal comminution consisting of a conical mill provided with a twin-nozzle rotating lance (HERA prototype).
  • An innovative waterjet-agitated flotation cell.
  • A pilot plant for the study of deep injection of reactive materials into soils, aimed at in situ treatment of contaminated groundwater according to the permeable barrier concept.

The laboratory hosts also the device for the basic tests concerning the treatment of soft materials (including the selective disintegration of end-of-life car tires) using plain water jets according to a new approach (AQUAVIS patent).

The full scale module called TIRES, based on the AQUAVIS concept and built by TERMOMECCANICA ENERGIA srl, has been recently installed in connection with the downstream line for the recovery of rubber powder.

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