(19)

(11)

EP 2 553 176 A2

(12)

(88) Date of publication A3: 29.12.2011 (43) Date of publication: 06.02.2013 Bulletin 2013/06 (21) Application number: 11724737.9 (22) Date of filing: 02.04.2011

(51) International Patent Classification (IPC):  E02D 27/48(2006.01) E02D 31/08(2006.01) (86) International application number: PCT/IB2011/000716 (87) International publication number: WO 2011/121439 (06.10.2011 Gazette 2011/40)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR (30) Priority: 02.04.2010 IT RM20100158 (71) Applicants: Agenzia Nazionale Per Le Nuove Tecnologie, L'Energia E Lo Sviluppo Economico Sostenibile (ENEA) 00196 Roma (RM) (IT) Politecnico di Torino 10129 Torino (IT)	(72) Inventors: CLEMENTE, Paolo I-00196 Roma (IT) DE STEFANO, Alessandro I- 10129 Torino (IT) BARLA, Giovanni I- 10129 Torino (IT) (74) Representative: Jorio, Paolo et al Studio Torta S.p.A. Via Viotti, 9 10121 Torino 10121 Torino (IT)