Waterproofing membrane with mineral binder component

Abstract

A membrane used in waterproofing, roofing and tunneling applications, the membrane includes a barrier layer including thermoplastic polymer component and a contact layer bonded directly to at least portion of the barrier layer, the contact layer includes a mixture of mineral binder component, thermoplastic polymer component, and surfactant component. Also includes a method for producing the membrane, a method for waterproofing a substrate, to a waterproofed construction, to a method for sealing a substrate against water penetration and to a sealed construction for sealing a substrate against water penetration.

1 . A membrane comprising a barrier layer having a first and a second opposing surface and a contact layer having a first and a second opposing surface, wherein at least a portion of the first surface of the barrier layer and the second surface of the contact layer are directly bonded to each other, and wherein the barrier layer comprises a thermoplastic polymer component and the contact layer comprises a mixture of a mineral binder component, a thermoplastic polymer component, and a surfactant component, and wherein the amount of the mineral binder component is 10.0-90.0 wt.-%, based on the total weight of the contact layer. 
     
     
         2 . The membrane according to  claim 1 , wherein the contact layer comprises not more than 3.0 wt. % of hydrated mineral binders, based on the total weight of the contact layer. 
     
     
         3 . The membrane according to  claim 1 , wherein the amount of the mineral binder component is 20.0-85.0 wt. % based on the total weight of the contact layer. 
     
     
         4 . The membrane according to  claim 1 , wherein the membrane has a concrete adhesion strength, determined by means of the method cited in the description, of at least 5 N/50 mm. 
     
     
         5 . The membrane according to  claim 1 , wherein the mineral binder component comprises at least one mineral binder selected from the group consisting of hydraulic binders, non-hydraulic binders, latent hydraulic binders, puzzolanic binders, and mixtures thereof. 
     
     
         6 . The membrane according to  claim 1 , wherein the surfactant component comprises at least one surfactant selected from the group consisting of anionic, cationic, non-ionic, amphoteric, and polymeric surfactants, and mixtures thereof. 
     
     
         7 . The membrane according to  claim 6 , wherein the at least one surfactant is selected from the group consisting of glycerol monostearates, polycarboxylate ethers, polyether-modified polysiloxanes, polyalkylene oxide siloxanes, hydroxyethyl amines, erucamides, stearyl stearamides, alkali metal alkanesulfonates, alkyl aryl sulfonates, and mixtures thereof. 
     
     
         8 . The membrane according to  claim 1 , wherein the amount of the surfactant component is 0.1-15.0 wt. % based on the total weight of the contact layer. 
     
     
         9 . The membrane according to  claim 1 , wherein the amount of the thermoplastic polymer component is 20.0-85.0 wt. % based on the total weight of the contact layer, and wherein the thermoplastic polymer component comprises at least one polymer selected from the group consisting of ethylene-vinyl acetate copolymers (EVA), ethylene-acrylic ester copolymers, ethylene-α-olefin co-polymers, ethylene-propylene co-polymers, polypropylene (PP), polyethylene (PE), polyvinylchloride (PVC), polyethylene terephthalate (PET), polystyrene (PS), polyamides (PA), chlorosulfonated polyethylene (CSPE), ethylene propylene diene rubber (EPDM), polyisobutylene (PIB) and mixtures thereof. 
     
     
         10 . The membrane according to  claim 1 , wherein the thermoplastic polymer component is miscible. 
     
     
         11 . The membrane according to  claim 1 , wherein the contact layer has a thickness of 0.1-50.0 mm. 
     
     
         12 . The membrane according to  claim 1 , wherein the membrane further comprises a second contact layer having a first surface and a second opposing surface, and wherein at least a portion of the second surface of the barrier layer and the first surface of the contact layer are directly bonded to each other, and wherein the second contact layer comprises a mixture of a mineral binder component, a thermoplastic polymer component, and a surfactant component. 
     
     
         13 . A method for producing a membrane according to  claim 1  comprising extruding and/or calendering and/or co-extruding a homogenized melt comprising the components of the barrier layer, a homogenized melt comprising the components of the contact layer, and optionally a homogenized melt comprising the components of a second contact layer. 
     
     
         14 . A method for waterproofing a substrate, the method comprising the steps of
 applying a membrane according to  claim 1  to a surface of a substrate such that the second surface of the barrier layer is directed against the surface of the substrate,   casting a fresh cementitious composition on the first surface of the contact layer, and   hardening the fresh cementitious composition.   
     
     
         15 . A waterproofed construction comprising a layer of concrete and a membrane according to  claim 1  arranged between a surface of a substrate and the layer of concrete such that the second surface of the barrier layer is directed against the surface of the substrate and the first surface of the contact layer is fully bonded to the layer of concrete. 
     
     
         16 . A method for sealing a substrate against water penetration, the method comprising the steps of
 applying a layer of adhesive on the surface of the substrate,   covering the layer of the adhesive with a membrane according to  claim 1  such that first surface of the first contact layer or the second surface of the second contact layer is brought in contact with the layer of adhesive, and   hardening the layer of adhesive.   
     
     
         17 . The method according to  claim 16 , wherein the adhesive is a fresh cementitious composition or a synthetic resin composition. 
     
     
         18 . A sealed construction comprising a membrane according to  claim 1  and a layer of adhesive arranged between a surface of a substrate and the membrane such that the first surface of the first contact layer or the second surface of the second contact layer is bonded to the surface of the substrate with the layer of adhesive.