The present disclosure relates to a formwork system and, more specifically, but not exclusively, to a formwork system for forming concrete panels of a floor, a road, a pathway, a footpath, a sidewalk, or the like.
It is known to use a plastic concrete shuttering system for forming concrete slabs or panels, such as in a floor, a road, a pathway, a footpath, a sidewalk, or the like. In particular, there is a concrete formwork system available under the trademark “K-Form” that provides screed rails having a cross-sectional shape generally of an inverted T. However, the applicant has identified that such existing formwork systems often use metallic dowels that are sometimes prone to corrosion. The corrosion can sometimes lead to failure of the dowels resulting in adjacent panels no longer being kept level, or at least in deterioration of appearance where the corrosion becomes visible. Furthermore, the applicant has identified that it would be desirable for there to be provided a formwork system with improved cost-effectiveness.
Examples of the present disclosure seek to avoid or at least ameliorate one or more disadvantages of existing concrete formwork systems.
In accordance with the present disclosure, there is provided a formwork panel for forming adjacent concrete panels of a floor, a road, a pathway, a footpath, a sidewalk, or the like (individually or collectively referred to herein as a pathway), and a support bracket for supporting the system relative to a ground surface, wherein the formwork panel has a pair of vertically opposed longitudinal rails, and the support bracket has an engagement formation that has an unlocked orientation for inserting the formation between the opposed rails to abut against the formwork panel and a rotated, locked orientation wherein the formation is locked by the rails against lateral withdrawal from the formwork panel.
In various embodiments, the formation is unlocked from the opposed rails by rotation of the formation about a lateral axis of the system from the locked orientation to the unlocked orientation.
In various embodiments, the bracket is supported relative to the ground surface by a stake, and the bracket has an aperture for receiving a stake.
In various embodiments, the stake is threaded. In various such embodiments, the threaded stake has opposed faces and the bracket is formed with rotationally spaced engagement portions such that the stake is able to be freely slid through the bracket and locked by rotating the stake about its longitudinal axis relative to the bracket.
In various embodiments, the bracket terminates above a lower edge of the formwork panel.
In various embodiments, the formwork panel is formed as a unitary part.
In various embodiments, the formwork panel has a pair of opposed sidewalls formed integrally with at least one rib, the opposed sidewalls defining a void therebetween.
In various embodiments, the bracket is formed as a unitary part.
In various embodiments, the bracket has a central rib extending along the length of the bracket.
There is also disclosed a dowel for controlling relative level between adjacent panels, wherein the dowel is formed of corrosion-free material to avoid corrosion of the dowel.
In various embodiments, the adjacent panels are concrete panels.
In various embodiments, the dowel is formed of material which is non-metallic.
In various embodiments, the dowel is formed of a polymer material.
In various embodiments, wherein the dowel is formed of a plastic material.
In various embodiments, the dowel is formed of a metal material portion covered in a polymer material portion. In various such embodiments, the polymer material portion seals within itself the metal material portion in an air-tight seal.
In various embodiments, the dowel is formed from material to avoid corrosion from oxidation of the dowel.
In various embodiments, the dowel is substantially planar. In various embodiments, the dowel is in the form of a plate.
In various embodiments, opposed edges of the dowel are tapered inwardly toward a central axis of the dowel, the central axis lying within a plane of the dowel. In various such embodiments, tapering of the opposed edges of the plate dowel is configured to allow, in situ, lateral movement between the adjacent concrete panels once the panels contract during drying of the concrete.
In various embodiments, the dowel has a cross-ribbed structure on an upper surface and on a lower surface to increase structural rigidity.
In various embodiments, the dowel has rounded corners. In various such embodiments, the rounded corners are radiused.
In various embodiments, the dowel has rounded edges. In various embodiments, the rounded edges are radiused.
In various embodiments, the dowel has a flange arranged to abut against a sideform through which the dowel is inserted. In various such embodiments, the flange extends in a plane perpendicular to the plane of the plate dowel. In various such embodiments, the flange is adapted to seal against the sideform to prevent ingress of concrete to a joint between adjacent concrete panels.
In various embodiments, the dowel is adapted for use in a non-industrial application.
In various embodiments, the dowel is adapted for being cast into a concrete pathway to transfer load between adjacent concrete panels of the pathway.
There is also disclosed a concrete pathway formwork system including a dowel for transferring load between adjacent concrete panels, wherein the dowel is a dowel as described above.
There is also disclosed a concrete pathway formwork system including a sideform for forming adjacent concrete panels of a pathway and a dowel adapted to extend through the sideform for transferring load between the adjacent concrete panels, wherein the dowel is a dowel as described above.
In various embodiments, the sideform is formed as a unitary panel having one or more ribs between opposed faces to facilitate crushing of the sideform in response to expansion of the concrete panels.
In various such embodiments, the sideform panel is substantially planar and arranged to extend perpendicular to a surface of the pathway.
There is also disclosed a sleeve for a dowel, wherein the sleeve is adapted to clip on to formwork through which the dowel is inserted.
In various embodiments, the sleeve includes a flange for abutting against the formwork, a sleeve portion extending from the flange, an upper rib supporting the sleeve portion relative to the flange and a lower rib supporting the sleeve portion relative to the flange. In various such embodiments, the flange includes an upper flange portion for engagement with an upper rail of the formwork and a lower flange portion having resilient clips for clipping behind a lower rail of the formwork.
In various such embodiments, the sleeve includes surrounds around the resilient clips preventing dislodgement of the upper flange portion from the upper rail of the formwork.
In various embodiments, the sleeve includes crushable internal lateral movement voids located at opposed sides of a cavity for receiving the dowel.
In various embodiments, the sleeve includes an expansion void.
In various embodiments, the sleeve portion includes internal ribs which provide interference on insertion of the dowel.
In various embodiments, the sleeve includes centering ribs which, when the sleeve is clipped on to the formwork, protrude into a dowel slot of the formwork to prevent lateral misalignment of the sleeve and the slot.
There is also disclosed a concrete pathway formwork system including a sideform for forming adjacent concrete panels of a pathway, a dowel adapted to extend through the sideform for transferring load between the adjacent concrete panels, and a sleeve for receiving the dowel, wherein the sleeve is adapted to clip on to the sideform.
There is also disclosed an articulating dowel system, including a dowel and a dowel sleeve, wherein the dowel includes a cam portion located within the sleeve to allow the dowel to pivot relative to the dowel sleeve.
In various embodiments, the cam portion has a forward rounded part to facilitate pivoting of the dowel relative to the dowel sleeve, and a rearward tapered part extending rearwardly and tapering inwardly from the rounded part to limit pivotal movement of the dowel relative to the dowel sleeve. In various such embodiments, the rounded part and the tapered part define a pivot with upper and lower stops to allow limited upward and downward pivoting of the dowel relative to the dowel sleeve.
In various embodiments, the dowel is formed from corrosion-free material.
In various embodiments, the sleeve is adapted to clip on to a sideform for forming adjacent concrete panels.
There is also disclosed a concrete pathway formwork system including a sideform for forming adjacent concrete panels of a pathway, a dowel adapted to extend through the sideform for transferring load between the adjacent concrete panels, and a sleeve for receiving the dowel, wherein the dowel is arranged to pivot upwardly and/or downwardly relative to the sleeve.
In various embodiments, the concrete pathway formwork system includes a seal fitted to the sideform, wherein the seal has an aperture through which a tongue of the dowel in inserted such that the seal operates to seal between the dowel and the sideform against concrete ingress.
There is also disclosed a formwork panel for forming adjacent concrete bodies, wherein the formwork panel is adapted to be compressible on expansion of the concrete bodies.
In various embodiments, the formwork panel is substantially planar. In various such embodiments, the formwork panel is substantially planar to be in a plane substantially perpendicular to a travel surface formed by upper surfaces of the concrete bodies.
In various embodiments, the formwork panel is extruded.
In various embodiments, the formwork panel has at least one internal void to facilitate sacrificial compression of the formwork panel on expansion of the concrete bodies.
In various embodiments, the formwork panel has a pair of opposed sideform walls connected by at least one sacrificial rib defining an internal void between the opposed sideform walls.
In various embodiments, the formwork panel has a pair of opposed rails along at least one side of the formwork panel, the opposed rails defining a channel for slidable mounting of an accessory to the formwork panel. In various such embodiments, the channel enables the formwork panel to be connected to another like formwork panel by inserting one end of a joiner plate in the channel the formwork panel and an opposite end of the joiner plate in the channel of the like formwork panel.
In various embodiments, the formwork panel has a constant cross-sectional shape along its length and can be cut to length accordingly.
In various embodiments, the formwork panel has an upper capping, the capping having sidewalls and a top surface arranged to be level with upper surfaces of the concrete bodies.
There is also disclosed a formwork panel for forming adjacent concrete bodies, the formwork panel having a formwork panel body and a formwork panel capping arranged to be selectively moved from a coupled condition in which the formwork panel capping is coupled to the formwork panel body to form a surface level with upper surfaces of the concrete bodies and a decoupled condition in which at least part of the formwork panel capping is decoupled from the formwork panel body so as to form a well between the concrete bodies.
In various embodiments, the well has a predetermined depth.
In various embodiments, the formwork capping is formed with a frangible part which is torn to move the formwork panel capping from the coupled condition to the decoupled condition. In various such embodiments, the frangible part is located between an upper portion of the capping and a lower portion of the capping such that tearing the frangible part separates the upper portion of the capping from the lower portion of the capping.
In various embodiments, the capping includes opposed arms extending laterally outwardly from opposite sides of the capping such that distal ends of the arms are embedded in the concrete bodies. In various such embodiments, each of the distal ends has an enlarged portion to facilitate retainment in the concrete.
In various embodiments, the opposed arms extend outwardly from the lower portion of the capping.
In various embodiments, the arms can be stretched to accommodate relative outward movement/retraction of the concrete bodies.
Various embodiments of the present disclosure will be described, by way of non-limiting example only, with reference to the accompanying drawings in which:
With reference to
The adjacent panels being kept level by the dowel 10 are formed of concrete, however it is possible that the dowel 10 and associated formwork system may be used for maintaining a level between panels cast from a different material. As shown in
As can be seen in
As shown in
The dowel 10 may have a flange 18 arranged to abut against a sideform 20 (as seen in
The dowel may be adapted for use in a non-industrial application and may be adapted for being cast into a concrete pathway to transfer load between adjacent concrete panels of the pathway.
Accordingly, there is disclosed a corrosion-free tapered plate dowel load transfer system. The tapered plate dowel provides lateral movement once the joint contracts. The double-sided cross-ribbed structure provides increased structural rigidity (providing increased bending strength) by breaking up un-reinforced horizontal surfaces. Corners and edges are radiused to prevent point loads giving even distributed forces at the dowel perimeter. The flange 18 on the dowel 0 acts as a seal preventing concrete ingress into the joint. The flange 18 may optionally incorporate a rubber seal (not shown) to facilitate the sealing effect.
With reference to
With reference to
The sleeve 28 may include surrounds around the resilient clips 44 preventing dislodgement of the upper flange portion 38 from the upper rail 40 of the formwork 20. The sleeve 28 may include crushable internal lateral movement voids 48 located at opposed sides of a cavity 50 for receiving the dowel 10. The sleeve 28 may include an expansion void and the sleeve portion 32 may include internal ribs 52 that provide interference on insertion of the dowel 10. The sleeve 28 includes centering ribs 54 which, when the sleeve 28 is clipped on to the formwork 20, protrude into a dowel slot defined by the formwork 20 to prevent lateral misalignment of the sleeve 28 from the slot.
Accordingly, there is shown a concrete pathway formwork system 22 including a sideform 20 for forming adjacent concrete panels of a pathway, a dowel 10 adapted to extend through the sideform 20 for transferring loads between the adjacent concrete panels, and a sleeve 28 for receiving the dowel 10, wherein the sleeve 28 is adapted to clip on to the sideform 20.
It should be appreciated that various such embodiments of the present disclosure provide one or more of the following features or advantages: (1) a fastener-less pivoting clip on function for extruded formwork (2) resisting sleeve pull down by bracing itself above sleeve body with locked in cantilevered ribs; (3) ribs below the sleeve brace sleeve in compression; (4) surrounds around the clips that prevent sleeve dislodgement from top pivoting point; (4) incorporating 5 mm crushable internal lateral movement voids and a 10 mm expansion void; (6) corners and edges radiused to prevent point loads giving even distributed forces at the sleeve perimeter; (7) internal ribs providing interference to the plate dowel upon insertion to prevent accidental pull-out during concrete pouring; and (8) centring ribs protruding into the slot on formwork preventing lateral misalignment of the sleeve with the slot.
With reference to
The cam portion 62 has a forward rounded part 64 (as seen in
It should be appreciated that various embodiments of the present disclosure provide one or more of the following features or advantages: (1)corrosion-free articulating dowel system that allows for deflection control on light duty concrete pavements when joint articulates due to tree roots or reactive soil; (2) allowing up to 50 mm of simultaneous vertical lift on slabs while maintaining deflection control, load transfer, lateral dowel movement and expansion capabilities; (3) CAM component of dowel allowing dowel rotation while carrying load horizontally across joint; (4) a fastener-less pivoting clip on function of system to extruded formwork; (5) resisting sleeve pull down by bracing itself above sleeve body with locked in cantilevered ribs; (6) ribs below the sleeve brace sleeve in compression; (7) surrounds around the clips prevent sleeve dislodgement from top pivoting point; (8) incorporating 5 mm crushable internal lateral movement voids and a 10mm expansion void; (9) centring ribs protruding into the slot on formwork preventing lateral misalignment of the sleeve with the slot; (10) dowel is kept horizontal during concrete pour by crushable positioning ribs located internally in the sleeve; and (11) system is sealed off from concrete ingress with an additional seal.
With reference to
The formwork panel 76 may be substantially planar to be in a plane substantially perpendicular to a travel surface formed by upper surfaces of the concrete bodies. For example, as shown in
The formwork panel 76 may be extruded with a constant cross-sectional shape along its length such that the formwork panel 76 is able to be cut to length to suit a particular application. The formwork panel 76 has at least one internal void 80 to facilitate sacrificial compression of the formwork panel 76 on expansion of the concrete bodies 68. The formwork panel 76 has a pair of opposed sideform walls 82 connected by at least one sacrificial rib 84 defining an internal void 80 between the opposed sideform walls 82. The formwork panel 76 has a pair of opposed rails 86 along at least one side of the formwork panel 76, the opposed rails 86 defining a channel for slidable mounting of an accessory to the formwork panel 76. The channel enables the formwork panel 76 to be connected to another like formwork panel 76 (such as seen in
It should be appreciated that various embodiments of the present disclosure provide one or more of the following features or advantages: (1) compressible extruded sacrificial formwork panel and capping; (2) crushable up to 10mm to allow for thermal expansion at joint; (3) multi-functional utility channel that allows for components to be attached continuously along the length; (4) retaining function as an expansion joint and functionally of components when cut; and (5) panels can be joined with joiner plate at any point when cut.
The formwork panel 76 may also have an upper capping 90, the capping 90 having side walls 92 and a top surface 94 arranged to be level with the upper surfaces 78 of the concrete bodies 68, as shown in
With reference to
The formwork capping 90 may be formed with a frangible part 100 which is torn to move the formwork panel capping 90 from the coupled condition to the decoupled condition. The frangible part 100 may be located between an upper portion of the capping 90 and a lower portion of the capping 90 such that tearing the frangible part 100 separates the upper portion of the capping 90 from the lower portion of the capping 90.
The opposed arms 102 may extend outwardly from the lower portion of the capping 90, and the arms 102 may be able to be stretched to accommodate relative outward movement/retraction of the concrete bodies (as seen in
It should be appreciated that various embodiments of the present disclosure provide one or more of the following features or advantages: (1) flexible permanent/removable capping; (2) a first option for the capping to remain permanently with joint; (3) a second option for the capping to be ripped off joint (once poured) at tear points to allow scrabbling of joint and to create a welled rebate for use of joint sealants; (4) wings on side anchor into concrete (either side); and (5) ribs stretch with joint opening covering the gap preventing epoxies from running down joint gap and act as a debris and weed deterrent.
Turning to
The formation 108 is unlocked from the opposed rails 86 by rotation of the formation 108 about a lateral axis of the system from the locked orientation to the unlocked orientation.
The bracket 106 is supported relative to the ground surface by a stake 110 and the bracket 106 has an aperture 112 (as seen in
As can be seen in
It should be appreciated that various embodiments of the present disclosure provide one or more of the following features or advantages: (1) formwork bracing and height adjustment system; (2) attached to any point of the formwork panel utility channel with a twist and lock CAM base; (3) inserted and turned 45 degrees to lock; (4) fastener-less attachment process is quick and intuitive; (5) central rib-based shape provides additional anchorage of the joint in one slab (pour through); (6) removable and reusable before second pour (stop pour); and (7) twist and lock stake lock off.
It should also be appreciated that various embodiments of the present disclosure provide one or more of the following features or advantages: (1) application: Concrete Pavements for pathways (such as but not limited to Footpaths, Bikeways, etc) such as for pedestrian and light vehicular traffic in urban residential areas, parklands, commercial (retail) public spaces and civil infrastructure; (2) the system has been configured to satisfy the requirements of Australian Standard: AS 3727.1:2016 Residential Pavements; (3) a modular solution, with the capability to cast a range of slab thicknesses 75 mm, 100 mm, 125 mm & 150 mm; (4) modular sections are joinable to cast pavements up to (and greater than) 4m in width; (5) a self-supporting configuration, that is economical to freight, and is easily assembled on site; (6) the solution is non-corrosive for use in bayside applications or decorative pavement streetscapes; (7) a system that provide for thermal expansion and contraction to a maximum joint gap thickness of 10 mm; (8) a joint system that minimizes the impact of pavement slab heaving caused by (i) Tree Roots or (ii) Reactive Soil; and (9) a joint system that controls deflection under the conditions slab heaving caused by: (i) Tree Roots or (ii) Reactive Soil.
While various embodiments of the present disclosure have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. It will be apparent to a person skilled in the relevant art that various changes in form and detail can be made therein without departing from the spirit and scope of the present disclosure. Thus, the present disclosure should not be limited by any of the above-described exemplary embodiments.
The reference in this specification to any prior publication (or information derived from it), or to any matter which is known, is not, and should not be taken as an acknowledgment or admission or any form of suggestion that that prior publication (or information derived from it) or known matter forms part of the common general knowledge in the field of endeavour to which this specification relates.
Throughout this specification and the claims which follow, unless the context requires otherwise, the word “comprise”, and variations such as “comprises” and “comprising”, will be understood to imply the inclusion of a stated integer or step or group of integers or steps but not the exclusion of any other integer or step or group of integers or steps.
Number | Date | Country | Kind |
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2018904425 | Nov 2018 | AU | national |
2019264633 | Nov 2019 | AU | national |
This application is a continuation of and claims priority to and the benefit of U.S. patent application Ser. No. 17/292,624, filed May 10, 2021, which is a national stage application of PCT/US2019/061749, filed on Nov. 15, 2019, which claims priority to and the benefit of Australian Application No. 2018904425, filed Nov. 19, 2018, and Australian Application No. 2019264633, filed Nov. 14, 2019, the entire contents of each of which are incorporated herein by reference.
Number | Date | Country | |
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Parent | 17292624 | May 2021 | US |
Child | 18178398 | US |