Device and method for improving adhesive anchor performance
AssigneeUWM Research Foundation, Inc.
InventorJian Zhao
Life of this patent
Estimating the term…
Abstract
A cured concrete and stone bore working tool and method of forming radially oriented discontinuities in a bore or perforation Ruined in a cured concrete or stone material such that, after use or application of the tool, the perforation formed in the cured concrete or stone material is configured to provide a non-planar adhesive interface and isolate a properly sized anchor or fastener from direct contact with the wall of the bore. Fasteners or anchors adhesively secured in bores previously treated with the bore treating tool exhibit improved creep failure performance as compared to fasteners adhesively secured to untreated bores.
Claims21
A cured concrete or stone working tool comprising:
- an elongate body defined by a work facing end, a tool facing end, and a radially outward directed surface between the work facing end and the tool facing end;
- and
- at least one projection that extends in an outward radial direction from the radially outward directed surface of the elongate body proximate the work facing end, the at least one projection being constructed to remove cured concrete from a wall defined by a perforation previously formed in a cured concrete surface during introduction of the elongate body in an axial direction relative to the perforation to define a non-planar shape of the wall of the perforation upon extraction of the elongate body and prior to placement of an adhesive and an anchor relative to the perforation and such that the anchor is maintained in a spaced relationship from the wall of the perforation.
A method of providing an adhesive cured concrete or stone anchor system, the method comprising:
- forming a perforation in a cured concrete or stone material;
- forming at least one channel in a radially inward directed surface of the perforation formed in the cured concrete or stone material that faces the perforation and such that a majority of the at least one channel has a radius that is greater than a smallest radius associated with an exterior surface of the cured concrete or stone material about the perforation;
- disposing an amount of an adhesive in the perforation;
- and
- placing an anchor in the perforation such that the anchor is offset in a radially inward direction from the radially inward directed surface of the cured concrete or stone material along a length of the anchor that is inboard of the exterior surface of the cured concrete or stone material.
A method of forming a cured concrete or stone bore treatment tool comprising:
- providing an elongate body having a tip disposed at one end and a drive tool engagement formed at an opposing end of the elongate body, wherein the tip is ill-suited to bore into a cured concrete or stone material and the drive tool engagement is constructed to cooperate with a drive tool configured to rotate the elongate body;
- forming at least one projection on the elongate body between the tip and the drive tool engagement such that the at least one projection extends in an outward radial direction from an exterior surface of the elongate body;
- and
- wherein the elongate body is sized to fit snuggly within a bore formed in a cured concrete or stone material and the at least one projection removes cured concrete or stone material during rotation and axial translation of the elongate body relative to the bore in an inward axial direction.
Dependencies are inferred from the claim text.