Waterproofed concrete structure

Claim 2

IN COMBINATION (A) A STRUCTURE COMPRISING A FLEXIBLE SHEET-LIKE SUPPORT, ON ONE SIDE OF THE SUPPORT A LAYER OF BITUMINOUS COMPOSITION COMPRISING A MIXTURE OF A BITUMEN AND WAX, WHEREIN THE RATIO BY WEIGHT OF BITUMEN TO WAX IS FORM ABOUT 1 TO 10 PARTS BITUMEN PART OF WAX, AND ON THE OTHER SIDE OF THE SUPPORT A WATERPROOF PRESSURE-SENSITIVE ADHESIVE MEMBRANE FORMED OF A BITUMINOUS RUBBER COMPOSITION AT LEAST 0.025 CM THICK WHICH IS A BLEND OF A RUBBER SELECTED FROM THE GROUPING CONSISTING OF A NATURAL RUBBER, SYHTHETIC RUBBER, OR COMBINATIONS THEREOF, WITH A BITUMEN, THE RATIO BY WEIGHT OF SAID BITUMEN TO SAID RUBBER BEING GREATER THAN 80:20; (B) A CONCRETE SURFACE TO WHICH THE FACE OF SAID PRESSURE-SENSITIVE MEMBRANCE IS ADHERENT; AND (C) A LAYER OF LOAD BEARING, HOT POURED ASPHALTIC CONCRETE DEPOSITED OVER THE ADHERENT TO THE BITUMEN-WAX LAYER.

Claim 3

The combination of claim 1 wherein the support is a woven fabric of polypropylene fibers.

Claim 4

The combination of claim 1 wherein a layer of bituminous or neoprene-based primer composition is employed between said concrete and said membrane.

Claim 5

The combination of claim 3 wherein the melting point of the mixture of wax and bitumen is at least 115*F.

Claim 6

The combination of claim 1 wherein the melting point of the mixture of wax and bitumen is at least 175*F.

Claim 7

The combination of claim 1 wherein said wax is paraffin wax.

Claim 8

A waterproofing structure comprising a flexible sheet-like support, on one side of the support a layer of a bituminous composition which is not normally tacky but which becomes tacky at an elevated temperature comprised of normally tacky bitumen to which has been added sufficient wax to render the mixture non-tacky, and on the other side of the support a wateroroof pressure-sensitive adhesive membrane formed of a bituminous rubber composition at least 0.025 on thick which is a blend of a rubber selected from the group consisting of a natural rubber, synthetic rubber or combinations thereof and a bitumen, the ratio by weight of said bitumen to said rubber being greater than 80: 20.

Claim 9

A waterproofing structure comprising a flexible sheet-like support, on one side of the support a layer of a bituminous composition which is not normally tacky but which becomes tacky at an elevated temperature comprised of normally tacky bitumen to which has been added sufficient wax to render the mixture non-tacky, and on the other side of the support a wateroroof pressure-sensitive adhesive membrane formed of a bituminous rubber composition at least 0.025 on thick which is a blend of a rubber selected from the group consisting of a natural rubber, synthetic rubber or combinations thereof and a bitumen, the ratio by weight of said bitumen to said rubber being greater than 80: 20.

Claim 10

The structure of claim 7 wherein said support is a woven polypropylene mesh.

Claim 11

In combination (a) a structure comprising a flexible sheet-like support, on one side of the support a layer of a bituminous composition comprising a mixture of a bitumen and a wax wherein the ratio by weight of bitumen wax is from about 1 to 10 parts bitumen per part of wax, anD on the other side of the support a waterproof pressure-sensitive adhesive membrane formed of a bituminous rubber composition at least 0.025 cm thick which is a blend of a rubber selected from the group consisting of a natural rubber, synthetic rubber, or combinations thereof with a bitumen, the ratio by weight ofsaid bitumen to said rubber being greater than 80:20 and/less than 95:5; (b) a concrete surface to which the face of said pressure-sensitive adhesive membrane is adherent; and (c) a layer of load bearing, hot poured asphaltic concrete deposited over and adherent to the bitumen-wax layer.

Claim 12

In combination (a) a structure comprising a flexible sheet-like support, on one side of the support a layer of a bituminous composition comprising a mixture of a bitumen and a wax wherein the ratio by weight of bitumen wax is from about 1 to 10 parts bitumen per part of wax, anD on the other side of the support a waterproof pressure-sensitive adhesive membrane formed of a bituminous rubber composition at least 0.025 cm thick which is a blend of a rubber selected from the group consisting of a natural rubber, synthetic rubber, or combinations thereof with a bitumen, the ratio by weight ofsaid bitumen to said rubber being greater than 80:20 and/less than 95:5; (b) a concrete surface to which the face of said pressure-sensitive adhesive membrane is adherent; and (c) a layer of load bearing, hot poured asphaltic concrete deposited over and adherent to the bitumen-wax layer.

Claim 13

A waterproofing structure comprising a flexible sheet-like support on one side of the support a layer of a bituminous composition which is not normally tacky but which becomes tacky at an elevated temperature comprised of a normally tacky bitumen to which has been added sufficient wax to render the mixture non-tacky, and on the other side of the support a waterproof, pressure-sensitive adhesive membrane formed of a bituminous rubber composition at least 0.025 cm thick which is a blend of a rubber selected from the group consisting of a natural rubber, synthetic rubber, or combinations thereof with a bitumen, the ratio by weight of said bitumen to said rubber being greater than 80:20, the face of said membrane remote from said support being covered with a protective covering easily removable from the membrane without damage thereto.

Claim 14

A waterproofing structure comprising a flexible sheet-like support on one side of the support a layer of a bituminous composition which is not normally tacky but which becomes tacky at an elevated temperature comprised of a normally tacky bitumen to which has been added sufficient wax to render the mixture non-tacky, and on the other side of the support a waterproof, pressure-sensitive adhesive membrane formed of a bituminous rubber composition at least 0.025 cm thick which is a blend of a rubber selected from the group consisting of a natural rubber, synthetic rubber, or combinations thereof with a bitumen, the ratio by weight of said bitumen to said rubber being greater than 80:20, the face of said membrane remote from said support being covered with a protective covering easily removable from the membrane without damage thereto.

Claim 15

The structure of claim 10 wherein said protective covering is paper having a layer of release coating on its surface adjacent said membrane.