Unreinforced shrinkage compensating concrete floor slabs

• US 20060275077A1
• Filed: 03/21/2006
• Published: 12/07/2006
• Est. Priority Date: 03/21/2005
• Status: Abandoned Application

• Current Assignee: Kalman Floor Company
• Original Assignee: Kalman Floor Company
• Inventors: Ytterberg, Carl N.
• Application Number:
  US11/384,830
• Publication Number:
  US 20060275077A1
• Time in Patent Office: Days
• US Class Current: 404/40
• CPC Class Codes: E01C 5/08 Reinforced units with steel frames with metal upper or under layers E01C5/22
• CPC Class Codes: E01C 9/001 Paving elements formed in situ; Permanent shutterings therefor removable shutterings E01C19/502; moulding machines therefor E01C19/508; Inlays or reinforcements which divide the cast material in a great number of individual units reinforcement girders which do not break the cohesion of the covering material E01C11/16, E01C11/185
• CPC Class Codes: E04B 5/04 with beams or slabs of concrete or other stone-like material, e.g. asbestos cement E04B5/08, E04B5/14 take precedence
• CPC Class Codes: E04C 5/01 Reinforcing elements of metal, e.g. with non-structural coatings E04C5/08 takes precedence
• CPC Class Codes: E04F 15/02 Flooring or floor layers composed of a number of similar elements of webs E04F15/16
• CPC Class Codes: E04F 15/08 only of stone or stone-like material, e.g. ceramics, concrete; of glass or with a top layer of stone or stone-like material, e.g. ceramics, concrete or glass E04F15/02005 takes precedence

Abstract

A shrinkage-compensated concrete slab is formed with no reinforcing structural bars therein, but with plates around its periphery so as to restrain expansive and shrinkage forces. The plates can be made of steel and welded together at their ends, and can include studs extending inwardly from inner surfaces thereof for attachment to the slab.

Claims

1. A shrinkage-compensated concrete structure which comprises a concrete slab having no reinforcing structural bars embedded therein and a plurality of connected plates positioned around a periphery of the concrete slab to elastically restrain expansive and shrinkage forces developed by the concrete slab during setting.

2. The structure as defined in claim 1, wherein the plates are made of steel.

3. The structure as defined in claim 2, wherein the steel plates include attachment studs which extend from inner surfaces thereof into the concrete slab.

4. The structure as defined in claim 2, wherein said steel plates are connected end-to-end by welds.

5. The structure as defined in claim 1, wherein the plates are made of plastic.

6. The structure as defined in claim 1, wherein the concrete slab is square in shape.

7. The structure as defined in claim 1, wherein the concrete slab is rectangular in shape.

8. The structure as defined in claim 1, including a plastic sheeting beneath the concrete slab.

9. A method of providing a shrinkage-compensated concrete structure which comprises forming a concrete slab which has no reinforcing structural bars embedded therein, and encasing a periphery of said concrete slab with a plurality of plates to elastically restrain expansive and shrinkage forces developed by the concrete slab during setting.

10. A method as defined in claim 9, including connecting said plurality of plates end-to-end.

11. A method as defined in claim 10, where said plates are made of steel and are welded end-to-end.

12. A method as defined in claim 9, wherein the coarse aggregate size and shape in the concrete are adjusted to increase internal compression.