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(11)

EP 2 976 463 A1

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(43) Date of publication: 27.01.2016 Bulletin 2016/04 (21) Application number: 14722335.8 (22) Date of filing: 20.03.2014

(51) International Patent Classification (IPC):  E01C 13/06(2006.01) (86) International application number: PCT/IB2014/059992 (87) International publication number: WO 2014/147580 (25.09.2014 Gazette 2014/39)

(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 Designated Extension States: BA ME (30) Priority: 22.03.2013 IT MI20130443 (71) Applicant: Mapei S.p.A. I-20158 Milano (IT)	(72) Inventors: NOBILI, Angelo I-20158 Milano (IT) REBOSIO, Piera I-20158 Milano (IT) PRESOTTO, Alessandro I-20158 Milano (IT) (74) Representative: Bianchetti Bracco Minoja S.r.l.  Via Plinio, 63 20129 Milano 20129 Milano (IT)