Flexible protective membrane particularly useful for waterproofing and protecting reinforced concrete bodies and metal pipes
OwnerMoshe Te'eniinventor
Life of this patent
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Abstract
A flexible, protective and waterproofing membrane for application onto a body to conform to a surface of the body and to be bonded thereto is provided. The membrane includes a flexible polymeric sheet which has an open-textured surface on each of its opposite faces. The textured surfaces are impregnated with a dry, cementitious material and define interconnected internal voids open to the atmosphere. The dry cementitious material includes a water-hardenable cement which is substantially non-hydrated.
Claims26
A flexible, protective and waterproofing membrane for application onto a body to conform to a surface of the body and to be bonded thereto, comprising:
- a flexible polymeric sheet for providing protection against the penetration of water and having on each of its opposite faces an open-textured surface defining interconnected internal voids open to the atmosphere;
- said open-textured surface on each face of the polymeric sheet being impregnated with a dry cementitious material bonded to the respective surface;
- said dry cementitious material including a water-hardenable cement which is substantially in a non-hydrated condition, wherein the membrane is capable of being applied to assume the contour of a body and upon wetting said membrane by a cementitious water slurry including non-hydrated cement for applying between the membrane and the body, the membrane becomes bonded to said body by hydration of the non-hydrated cement in said membrane together with the non-hydrated cement in said slurry.
A combination comprising:
- a body;
- a flexible, protective and waterproofing membrane bonded to a surface thereof, said membrane comprising a flexible, polymeric sheet for providing protection against the penetration of water and having on each of its opposite faces an open-textured surface defining interconnected internal voids open to the atmosphere, said open-textured surface on each face of the polymeric sheet being impregnated with a cementitious material bonded to the respective surface and including a water-hardenable cement which is substantially in a non-hydrated condition;
- and
- a layer of cementitious material including water-hardenable cement applied between said membrane and said body, such that hydration of the non-hydrated cement in the membrane together with that in said cementitious material bonds said membrane to said body.
A method of making a flexible, protective and waterproofing membrane for application onto a body to conform to the surface thereof and to be bonded thereto, comprising;
- providing a flexible polymeric sheet having on each of its opposite faces an open-textured surface defining interconnected internal voids open to the atmosphere;
- impregnating said open-textured surfaces of each face with a cementitious water slurry having a water-hardenable cement therein;
- and
- drying said cementitious slurry before said water-hardenable cement significantly hydrates.
A method of protecting a body against corrosion or water penetration, comprising:
- bonding fibrous layers to the opposite faces of a polymeric sheet, each fibrous layer having interconnected internal voids open to the atmosphere;
- impregnating said fibrous layers with a liquid cementitious impregnant comprising water-hardenable cement;
- applying said polymeric sheet and a wet cementitious material also comprising non-hydrated cement to the body before said cement of the impregnant hydrates to a significant extent, such that the cement in said wet cementitious material hydrates together with the cement in said impregnant to bond said polymeric sheet to said body.
Dependencies are inferred from the claim text.