Method for restoring load transfer capability

• US 6,052,964 A
• Filed: 03/16/1998
• Issued: 04/25/2000
• Est. Priority Date: 03/16/1998
• Status: Expired due to Term

• Current Assignee: Uretek USA Incorporated (Ground Works Solutions, Inc.)
• Original Assignee: Uretek USA Incorporated (Ground Works Solutions, Inc.)
• Inventors: Wyman, Ransome J., Rogalla, Ernest Albert, Krauss, Paul Donald, Ferm, Carl A.
• Primary Examiner(s): Friedman, Carl D.
• Assistant Examiner(s): Wilkens, Kevin D.
• Application Number:
  US09/042,591
• Time in Patent Office: 771 Days
• Field of Search: 52/393, 52/396.02, 52/514.5, 52/742.15, 52/742.14, 404/47, 404/48, 404/51, 404/56, 404/64, 404/66, 404/67, 404/70, 404/74, 404/75, 404/78
• US Class Current: 52/742.14
• CPC Class Codes: E01C 11/14 Dowel assembly ; Design or construction of reinforcements in the area of joints coupling devices for prefabricated units E01C5/005; combined with characteristic packings E01C11/08 - E01C11/12; removable holders E01C23/045
• CPC Class Codes: E01C 7/147 Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering applying thin surface layers with other binder E01C7/35; repairing pavings in general E01C11/005; roughening by means of tools E01C11/24
• CPC Class Codes: E04B 1/215 comprising metallic plates or parts
• CPC Class Codes: E04G 23/0203 Arrangements for filling cracks or cavities in building constructions
• CPC Class Codes: E04G 23/0218 Increasing or restoring the load-bearing capacity of building construction elements E04G23/0203 and E04G23/0266 take precedence
• CPC Class Codes: F16L 13/10 Adhesive or cemented joints

Abstract

A method for restoring load transfer capability across a joint between two adjacent concrete slabs includes cutting a slot perpendicularly to the joint and extending into each of the adjoining slabs. The slot and joint are then integrally filled with polymer concrete to tie the slabs together. A joint tie may be placed in the slot and encased by the polymer concrete when restoring load transfer capability.

Claims

1. A method for improving the transference of a load from a first slab to a second slab across a joint between said first and second slabs, comprising the steps of:

cutting a slot into said first and said second slabs, said slot extending generally perpendicular to said joint;

integrally filling said slot and said joint with polymer concrete, thereby creating a single, integral structure having a length extending the length of said joint.

2. The method of claim 1, further comprising the step of placing aggregate into said slot and joint.

3. The method of claim 1, further comprising the steps of cutting a plurality of generally parallel slots into said first and second concrete slabs, whereby said slots extend generally perpendicular to said joint;

and integrally filling said plurality of slots and said joint with polymer concrete.

4. The method of claim 1, wherein said concrete slabs are roadway slabs, and said slot is cut in an area of normal tire travel on said first and second concrete slabs.

5. The method of claim 1 wherein said joint is a transverse joint, a horizontal joint, or a crack.

6. The method of claim 1, further comprising the steps of cutting a joint slot generally along said joint, removing excess material from said joint slot, and integrally filling said slot and said joint slot with polymer concrete.

7. The method of claim 1, further comprising the step of removing excess material from said slot and said joint after cutting said slot.

8. The method of claim 7, further comprising the step of drying said slot and said joint.

9. The method of claim 1, further comprising the step of placing a joint tie having a first and second end in said slot, whereby said first end extends into said first concrete slab and said second end extends into said second concrete slab.

10. The method of claim 9, wherein said joint tie comprises a fiberglass reinforced plastic tie.

11. The method of claim 9, wherein said joint tie has a hole extending through said joint tie.

12. The method of claim 1, further comprising the step of mixing components of said polymer concrete in a static mixture.

13. The method of claim 12, further comprising the step of adding surfactants with isocyanate reactive sites to said polymer concrete.

14. The method of claim 12, further comprising the step of adding low viscosity plasticizers to said polymer concrete.

15. The method of claim 12, further comprising the step of adding polymerization accelerating catalysts to said polymer concrete.