Monolithic pour joint

a monolithic, pour joint technology, applied in the direction of roads, constructions, paving details, etc., can solve the problems of small decrease in the overall volume of concrete, cracks may occur, large cracks may develop in concrete, etc., to prevent buckling or relative angular or vertical displacement of slabs, prevent unevenness or steps

US20050036834A1Inactive Publication Date: 2005-02-17SHAW LEE A +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Publication Date
2005-02-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

There is provided a monolithic pour joint interposed between adjacent concrete slabs disposed on a substrate. The pour joint comprises a plurality of elongate forms interconnected with splices. Each one of the forms has a substantially planar, vertical panel with upper and lower edges and opposing ends respectively defining a form width and a form length. The forms are arranged such that the form lengths are generally aligned end to end. The lower edge of the vertical panel has a base flange extending generally laterally therefrom. A plurality of stakes are disposed in transverse relation to the form width and are secured to a side of the vertical panel at spaced intervals to fixedly maintain the forms in relation to the substrate. The pour joint may include a plurality of dowel holes extending through the vertical panel such that a dowel placement system may be installed in the pour joint.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] (Not Applicable) STATEMENT RE: FEDERALLY SPONSORED RESEARCH / DEVELOPMENT

[0002] (Not Applicable) BACKGROUND OF THE INVENTION

[0003] The present invention relates generally to concrete forming equipment and, more particularly, to a uniquely configured monolithic pour joint specifically adapted to prevent shear cracking of adjacently disposed concrete slabs. The pour joints are configured to facilitate the placement of dowel rods within adjacent concrete slabs.

[0004] During construction of concrete pavement such as for sidewalks, driveways, roads and flooring in buildings, cracks may occur due to uncontrolled shrinkage or contraction of the concrete. Such cracks are the result of a slight decrease in the overall volume of the concrete as water is lost from the concrete mixture during curing. Typical contraction rates for concrete are about one-sixteenth of an inch for every ten feet of length. Thus, large cracks may develop in concrete wh...

Examples

Embodiment Construction

[0028] Referring now to the drawings wherein the showings are for purposes of illustrating preferred embodiments of the present invention and not for purposes of limiting the same, FIG. 1 illustrates a monolithic pour joint 10 of the present invention wherein the pour joint 10 may be interposed between concrete slabs 12 that are disposed above a subgrade or a substrate 14. The substrate 14 may be soil underlying the slab. Alternatively, the substrate 14 may be a metal decking or other underlying surface adapted to support concrete slabs 12. The pour joint 10 is comprised of at least one elongate form 16 or a plurality of forms 16 arranged in end-to-end alignment with a splice 60 interconnecting the forms 16 and a plurality of elongate stakes 48 secured to a side of the forms 16 to fixedly maintain or support the forms 16 above the substrate 14.

[0029] Each of the forms 16 includes a substantially planar, vertical panel 18 having an upper edge 20 and a lower edge 22 to define a form ...