Concrete cure blanket having integral heat reflective means

• US 5,855,978 A
• Filed: 05/16/1997
• Issued: 01/05/1999
• Est. Priority Date: 05/16/1997
• Status: Expired due to Term

• Current Assignee: Midwest Canvas Corporation
• Original Assignee: Midwest Canvas Corporation
• Inventors: Handwerker, Gary
• Primary Examiner(s): Richter, Johann
• Assistant Examiner(s): MURRAY, JOSEPH H
• Application Number:
  US08/857,660
• Time in Patent Office: 599 Days
• Field of Search: 428/57, 428/73
• US Class Current: 428/57
• CPC Class Codes: B32B 15/14 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2262/0253 Polyolefin fibres vinyl or acrylic copolymers B32B2262/0223 or B32B2262/0246
• CPC Class Codes: B32B 2307/304 Insulating
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 3/28 characterised by a layer comprising a deformed thin sheet , i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled B32B29/08 takes precedence
• CPC Class Codes: B32B 5/18 characterised by features of a layer of foamed material
• CPC Class Codes: B32B 5/26 another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: C04B 40/04 Preventing evaporation of the mixing water permanent coverings C04B41/00
• CPC Class Codes: Y10T 428/19 Sheets or webs edge spliced or joined
• CPC Class Codes: Y10T 428/238 Metal cover or casing

Abstract

A lightweight multilayer heat reflective concrete cure blanket having a moisture-impervious top outer layer, a moisture impervious bottom outer layer, and the top and bottom layers sealingly connected to each other at the boundaries of the layers to form a moisture impervious chamber between the first and second layers. The chamber includes at least one insulative layer therein, and a heat reflective material is applied to an outer surface of the bottom layer to reflect heat emanating from the concrete when the blanket is placed over the concrete. A protective heat permeable layer is applied over the heat reflective material to protect the heat reflective material from chemicals and dirt in the concrete. In a further embodiment, a second heat reflective material is applied to an inner surface of the upper layer to reflect additional heat which radiates from the concrete through the insulative layer and back towards the concrete.

Claims

1. A lightweight multilayer heat reflective concrete cure blanket comprising:

a moisture impervious first top outer layer;

a moisture impervious second bottom outer layer disposed in spaced relation to said first top layer, said first and second layers sealingly connected to each other at the boundaries of said layers to form a moisture-impervious chamber between said first and second layers;

at least one heat insulative layer disposed in said chamber between said first and second layers; and

said second bottom layer comprising a woven material having an upper and lower surface, a heat reflective material applied to the lower surface of said woven material to reflect heat emanating from the concrete when the blanket is placed over concrete, and a protective heat permeable layer over said heat reflective material to protect the heat reflective material from chemicals and dirt in the concrete.

2. The concrete cure blanket of claim 1, including:

a second heat reflective material applied to a surface of the first top outer layer, said second heat reflective coat reflecting additional heat emanating from the concrete and back towards the concrete, which additional heat has passed through the at least one heat insulative layer in the chamber of the concrete cure blanket.

3. The concrete cure blanket of claim 1 wherein said first top outer layer comprises a layer of woven polyethylene and a coat of polyethylene in sealing contact with the woven polyethylene layer.

4. The concrete cure blanket of claim 1 wherein said at least one heat insulative layer comprises a plurality of insulative elements disposed in spaced relation to each other on at least one surface of said insulative layer, with spaces defined in said at least one insulative layer between said insulative elements, said insulative elements adapted to substantially retain heat and said spaces adapted to substantially form a heat transfer path through a portion of said insulative layer.

5. The concrete cure blanket of claim 4 including:

a second heat reflective material applied to a surface of the first top outer layer which surface faces said chamber, said second heat reflective material reflecting heat passing through said at least one insulative layer back through said spaces in said at least one insulative layer in a direction towards said concrete.

6. The concrete cure blanket of claim 1 wherein said heat reflective material comprises an aluminum coating.

7. The concrete cure blanket of claim 2 wherein said first and second heat reflective materials are disposed to reflect heat in the same direction.

8. The concrete cure blanket of claim 4 including a second heat reflective material applied to a surface of said first top outer layer, said surface facing said chamber;

a portion of the heat radiating from said concrete passing through the spaces defined in said at least one insulative layer and reflecting off of said second heat reflective material, said reflected heat from said second heat reflecting material passing through said spaces in a direction toward said concrete.

9. The concrete cure blanket of claim 4 wherein said at least one heat insulative layer comprises a plurality of heat insulative layers disposed in said chamber, each of said heat insulative layers comprising a plurality of insulative elements disposed in spaced relation to each other on at least one surface of said insulative layer, with spaces defined in each of said insulative layers between said insulative elements, said insulative elements adapted to substantially retain heat and said spaces adapted to substantially form a heat transfer path through a portion of each said insulative layer.

10. The concrete cure blanket of claim 1 wherein said heat insulative layer comprises foam insulating material.

11. The concrete cure blanket of claim 1 wherein said heat insulative layer comprises a plurality of foam insulating elements.

12. The concrete cure blanket of claim 1 wherein said heat insulative layer comprises at least one insulative layer having a plurality of insulative elements disposed in spaced relation to each other on at least one surface of said insulative layer, with spaces defined in each of said insulative layers between said insulative elements;

and

at least one insulative layer composed of foam material.

13. The concrete cure blanket of claim 1 wherein said woven material is comprised of polyethylene.