Method and apparatus for concrete removal

Abstract

Embodiments relate generally to methods and apparatus for wet concrete extraction. An example apparatus includes: an elongated cylindrical housing having a closed first end and an open second end and defining a first bore in fluid communication with the second end; an auger disposed to rotate in the first bore of the housing; a drive mechanism in the first end to drive the auger; an attachment mechanism coupled to the first end to enable attachment of the apparatus to a vehicle; and a drainage conduit defining a second bore and extending from the housing at a position adjacent an upper end of a blade of the auger. In operation of the drive mechanism to drive the auger while the second end is submerged in wet concrete, the apparatus is configured to extract wet concrete into the second end, along the first bore and out of the second bore of the drainage conduit.

Description

"Method and apparatus for concrete removal"Technical Field

[0001] The present disclosure generally relates to methods and apparatuses for remediating concrete. The present disclosure more specifically relates to methods and apparatuses for removing poured concrete before it has fully set.Background

[0002] Concrete is widely used as a building material. Wet concrete is poured into formwork corresponding to the shapes of the desired structure, which may be a slab, panel, or footing for a foundation. Some projects require the use of piers or piles as part of the foundation to transfer the structural loads to the bedrock. Piles may be particularly required for highly loaded structures such as tall buildings or bridges.

[0003] When pouring concrete, an excess amount may be poured (“overpoured”). For example, the overpour may account for shrinkage during evaporation of the water in the water-cement mix. This excess concrete must then be removed once the wet concrete has set so that the cured concrete structure has the required size and / or shape. Some methods of removing the concrete involve using a jackhammer or other power tools to break up the concrete for subsequent removal. These methods are typically labour intensive, adding to the cost and time of the project. There may also be health risks associated with these methods, such as silicosis from workers inhaling the fine dust produced when breaking up the concrete.

[0004] It is desired to reduce or ameliorate one or more shortcomings of prior methods and apparatus for removing overpoured concrete, or to at least provide a useful alternative thereto.

[0005] Any discussion of documents, acts, materials, devices, articles or the like which has been included in the present specification is not to be taken as an admissionthat any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present disclosure as it existed before the priority date of each of the appended claims.

[0006] Throughout this specification the word "comprise", or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element, integer or step, or group of elements, integers or steps, but not the exclusion of any other element, integer or step, or group of elements, integers or steps.Summary

[0007] Some embodiments relate to an apparatus for wet concrete extraction, the apparatus including: an elongated cylindrical housing having a closed first end and an open second end and defining a first bore in fluid communication with the second end; an auger disposed to rotate in the first bore of the housing; a drive mechanism in the first end to drive the auger; an attachment mechanism coupled to the first end to enable attachment of the apparatus to a vehicle; and a drainage conduit defining a second bore and extending from the housing at a position adjacent an upper end of a blade of the auger; wherein, in operation of the drive mechanism to drive the auger while the second end is submerged in wet concrete, the apparatus is configured to extract wet concrete into the second end, along the first bore and out of the second bore of the drainage conduit.

[0008] The attachment mechanism may be configured for coupling to an excavator arm. The apparatus may further include a flexible hose couplable to the drainage conduit to allow drainage of extracted wet concrete to a location away from the second end.

[0009] The drive mechanism may be pneumatically operated. The drive mechanism may be configured to drive the auger at between about 30 revolutions per minute (RPM) and about 80 RPM.

[0010] The housing may include an access aperture at a position between the drainage conduit and the first end. The auger may be coupled to the drive mechanism by a release mechanism, and wherein the release mechanism is accessible through the access aperture.

[0011] The first bore may be defined by an inner cylindrical wall of the housing and separation between an outer edge of a blade of the auger and the inner cylindrical wall is between about 5mm to about 10mm.

[0012] A length of the housing from the first end to the second end may be between about Im to about 2.5m. A length of the housing from the first end to the drainage conduit may be about 0.4m to about 0.6m.

[0013] An outside diameter of the housing may be between about 0.25m to about 0.35m. An outside diameter of the housing may be about 0.3m. An inside diameter of the drainage conduit may be between about 0.15m to about 0.20m.

[0014] A pitch of the auger blade may be between about 0.2m and about 0.3m.

[0015] The housing may be separable into first and second housing parts by release of one or more couplings, wherein the first housing part includes the first end and the drive mechanism and the second housing part includes the second end and the drainage conduit.

[0016] Some embodiments relate to a vehicle having coupled thereto the apparatus as described above and configured to provide power and control to operate the apparatus.

[0017] Some embodiments relate to a method of remediation of over-poured concrete, including:positioning an open end of a cylindrical housing containing an auger to be submerged in wet concrete; operating the auger to draw the wet concrete up the cylindrical housing to a drainage conduit that is in fluid communication with a bore of the cylindrical housing to cause the wet concrete to flow away from the auger along the drainage conduit to a drainage location.

[0018] The positioning may include orienting the cylindrical housing at between about 0° to about 20° relative to vertical. The method may further include, prior to the positioning, coupling an apparatus to a vehicle, the apparatus including the cylindrical housing, the auger, the drainage conduit and a drive mechanism. The positioning may include moving the vehicle having the apparatus coupled thereto.

[0019] The coupling may include coupling the drive mechanism to a control system of the vehicle, and the operating may include operating controls of the control system of the vehicle to drive rotation of the auger in the cylindrical housing. Operating the controls may include driving rotation of the auger at between about 30 RPM and about 80 RPM.

[0020] Some embodiments relate to a method of wet concrete extraction, including: positioning an open end of the cylindrical housing of the apparatus as described above to be submerged in wet concrete; operating the auger to draw the wet concrete up the cylindrical housing to the drainage conduit to cause the wet concrete to flow away from the auger along the drainage conduit to a drainage location.Brief Description of Drawings

[0021] Fig. 1 is a schematic diagram of an apparatus for wet concrete extraction, according to some embodiments of the present disclosure;

[0022] Fig. 2 is a schematic diagram of the apparatus of Fig. 1, showing selected components thereof, according to some embodiments of the present disclosure;

[0023] Fig. 3 is a process flow diagram for a method of wet concrete extraction using the apparatus of Fig. 1, according to some embodiments of the present disclosure; and

[0024] Fig. 4 is a schematic illustration of a vehicle or machine with the apparatus coupled thereto.Detailed Description

[0025] The present disclosure generally relates to methods and apparatuses for remediating concrete. The present disclosure more specifically relates to methods and apparatuses for removing poured concrete before it has fully set.

[0026] Fig. 1 is a schematic diagram of an apparatus 100 for remediation or removal of over-poured concrete, according to some embodiments of the present disclosure. Apparatus 100 may be used for wet concrete extraction.

[0027] The apparatus 100 may include a housing 200. The housing 200 may be elongated. A longitudinal length of the housing is multiple times greater than a lateral width of the housing 200. The housing 200 may be cylindrical. The housing 200 may be tubular. The housing 200 may be made of steel or other suitable strong and durable metal and / or plastic material. The apparatus 100 may comprise an inlet 102 and an outlet 104.

[0028] The apparatus 100 may comprise an auger 110 disposed within the housing 200. The apparatus 100 may further comprise a drive mechanism 120 to drive the auger 110. The auger 110 may be connected to the drive mechanism 120 by a release mechanism 130. The release mechanism 130 may be a pin to enable removal of the auger 110, for example. The apparatus 100 may further comprise an attachment mechanism 140 to enable attachment of the apparatus 100 to a vehicle (not shown).The vehicle may be configured to provide power and control to operate the apparatus 100. The apparatus 100 may be attached to an earthmoving or other suitable vehicle having hydraulics and a motor to drive the auger 110, thereby allowing convenient manoeuvrability of the apparatus 100 during its operation, and / or transportation of the apparatus 100 before and after operation. The attachment mechanism 120 may be configured for coupling to an excavator arm of an excavator.

[0029] The auger 110 may comprise a shaft 112 having a tip 114 and a shank 116 at opposite ends of the shaft 112. The shank 116 may be configured to attach to the drive mechanism 120 and / or the release mechanism 130. The auger 110 may further comprise a blade 118 extending helically along the shaft 112, wherein the blade 118 is configured to draw material from the tip 114 towards the shank 116 during rotation of the auger 110, such as shown by arrow 106.

[0030] An example of a commercially available auger 110 may be the “S4 Auger - 300mm” supplied by Attachment Warehouse of Bells Creek in Queensland, Australia (attachmentwarehouse.com.au). The S4 Auger has the following features:• Auger Size: outer diameter 300mm• Rock Pilot and Teeth or Tungsten Pilot and Teeth• Overall Length: 1200mm Long• Flight Length: 700mm

[0031] The S4 Auger - 300mm is designed for Mini Loaders, Skid Steer Loaders, and Excavators up to 5T. Other sizes of the S4 auger are available at Attachment Warehouse, and may be used in combination with a larger or smaller one of housing 200 having the appropriate inner diameter that provides the appropriate separation X.

[0032] The inlet 102 of the housing 200 and the tip 114 of the auger 110 are configured to be inserted into a pit or borehole 150 containing wet concrete, such as is shown in Fig. 1. The wet concrete may enter the inlet 102 of the housing 200 and at least partially submerge the tip 114. Rotation of the auger 110 may draw wet concrete further into the housing 200 until the wet concrete reaches the outlet 104, such asshown by arrow 107. Further rotation of the auger 110 may cause most, if not all, of the wet concrete to exit the housing 200 through the outlet 104.

[0033] The outlet 104 of the apparatus 100 may be defined by a drainage conduit 240 of the housing 200. The drainage conduit 240 may comprise a flange 242. The apparatus 100 may further include a flexible hose 250 couplable to the drainage conduit 240. The flexible hose 250 may comprise a flange 252. The flanges 242, 252 may be configured to be connected, such as by a clamp (not shown), to allow wet concrete to flow from the drainage conduit 240 to the flexible hose 250, such as shown by arrow 108. The wet concrete may then flow through the flexible hose 250 and exit at a distal end of the flexible hose 250, such as shown by arrow 109.

[0034] When connected, the flexible hose 250 extends from the drainage conduit 240 to allow drainage of extracted wet concrete to a location away from the housing 200. This may be a location distal to the second end 204. The drainage conduit 240 may extend perpendicularly from the housing 200. The drainage conduit 240 may be rigid in comparison to the flexible hose 250 to encourage wet concrete to flow from the first bore 206 into the flexible hose 250.

[0035] An example of a commercially available flexible hose 250 may be the “Eaton EHK007 Marauder HD 1250 PSI Wire Concrete Pumping Hose” supplied by Abbott Rubber Company (cementhose.com) in Illinois, USA.

[0036] The auger 110 may be rotated until a desired amount 152 of wet concrete has been removed from the pit 150. In some embodiments, the apparatus 100 is used in the production of foundation piles on site. A borehole is drilled and filled with steel reinforcement and wet concrete. In Victoria, the VicRoads standard applicable for bored cast in-piles (without permanent casing) prescribes pouring an extra amount of concrete on top of the pile concrete, for example to account for contamination as the wet concrete cures. This extra concrete acts as a protective buffer or sacrificial layer for the pile concrete to remain uncontaminated. For dry piles, the VicRoads standard prescribes a minimum of 300mm above the pile cut-off level (top of the pile). For wetpiles, the VicRoads standard prescribes a minimum of 400mm above the pile cut-off level (top of the pile). In some usage scenarios, the auger 110 may be rotated until approximately 100mm to 150mm of wet concrete has been removed from the pit 150. The remaining amount of concrete 154 may be left in the borehole 150 to cure and form a pile.

[0037] While the inventors have designed the apparatus 100 for use with wet concrete, use of the apparatus 100 with other slurry or slurry-like substances is expected to be viable, particularly if the viscosities, moisture content, and / or densities are similar.

[0038] Fig. 2 is a simplified view of the apparatus 100 of Fig. 1, showing only the housing 200, the auger 110, the drive mechanism 120, the release mechanism 130, and the attachment mechanism 140.

[0039] The housing 200 may comprise a closed first end 202 and an open second end 204. A length Z of the housing 200 from the first end 202 to the second end 204 may be between about Im to about 2.5m. A length R of the housing 200 from the first end 202 to the drainage conduit 240 may be about 0.4m to about 0.6m. A length Q of the housing 200 from the second end 204 to the drainage conduit 240 may be about 0.5m to about 2.0m. An outside diameter of the housing 200 may be between about 0.25m to about 0.35m. An inner diameter of the housing, S, may be between about 0.22m to about 0.32m. The housing 200 may have a wall thickness of 10mm to 15mm. For example, in an embodiment, the housing 200 is 2.5m (2500mm) long as measured from the first end 202 to the second end 204, and has an inner diameter of 0.3 Im (310mm) to accommodate an auger having an outer diameter of 0.3m (300mm). The housing 200 may have a wall thickness of 15mm in this embodiment. An outer diameter of the housing 200 may be approximately 0.34m (340mm), in this embodiment. The housing 200 is 2m (2000mm) long as measured from the drainage conduit 240 to the second end 204 in this embodiment.

[0040] The housing 200 may define a first bore or lumen 206 in fluid communication with the second end 204. The housing 200 may be a tubular body. The first bore 206 of the housing 200 is configured to receive the auger 110 and allow rotation of the auger 110 within the bore 206.

[0041] The housing 200 may include an access aperture 208. The access aperture 208 may be disposed at a position between the drainage conduit 240 and the first end 202. The access aperture 208 may permit access to the drive mechanism 120. The access aperture 208 may permit access to the release mechanism 130.

[0042] The drive mechanism 120 may be located in the first end 202 of the housing 200 to connect to and drive the auger 110. The attachment mechanism 140 may be coupled to the first end 202 to enable attachment of the apparatus 100 to a vehicle.

[0043] In some embodiments, the housing 200 is an elongate body formed from a single tube. In some embodiments, the housing 200 is an elongate body formed from multiple tubes which may be separable or permanently connected to each other. The housing 200 may comprise a first housing part 210 and a second housing part 220. The first and second housing parts 210, 220 may be connected by one or more couplings 230. The access aperture 208 may be defined in part by the first and second housing parts 210, 220, and may accordingly be formed when the first and second housing parts 210, 220 are connected. In some embodiments, the access aperture 208 is wholly defined by the first housing part 210 or the second housing part 220. The access aperture 208 may assist with inspection of the auger 110 and / or the drive mechanism 120 without having to separate the first and second housing parts 210, 220. The first housing part 210 may include the first end 202. The second housing part 220 may include the second end 204. The second end 204 may define the inlet 102.

[0044] The access aperture 208 is preferably sized to allow a human hand to comfortably reach through the access aperture 208. The access aperture 208 is preferably sized to be large enough to allow a person to see around the person’s arm to the inside of the housing 200 while the person’s arm is in the access aperture 208. Thisallows a person to manipulate the release mechanism 130 for attachment and detachment of the auger 110 to the drive mechanism 120, clean the inside of the housing 200 where necessary and / or fix or inspect couplings or components when necessary. The (longitudinal) length of the access aperture 208 may be between 12cm and 30cm, for example. The (lateral / circumferential) width of the access aperture 208 may be between 12cm and 30cm, for example.

[0045] The housing 200 may be separable into the first and second housing parts 210, 220 by release of the one or more couplings or fasteners 230, such as bolts, clamps, clips, connectors, coupling flanges or threaded connections (not shown), for example. This may allow for easy cleaning of the first bore 206; for example, after the target amount of wet concrete has been extracted, some wet concrete may remain in the auger 110 and / or housing 200. The remaining wet concrete may be removed via a pressure washer or other cleaning method, for example. The separable housing 200 may allow for easy access to the auger 110, for example to access the release mechanism 130 to remove the auger 110 from the drive mechanism 120. Separability may also allow for easier transportation and storage of the apparatus 100.

[0046] The first housing part 210 may be configured to receive the drive mechanism 120 and the shank 116. The second housing part 220 may be configured to receive the shaft 112 and blade 118 of the auger 110. The second housing part 220 may define the outlet 104 of the apparatus 100. In embodiments where the housing 200 is a single tube, the outlet 104 is defined by a wall of the housing 200.

[0047] The housing 200 may comprise a wall 222 comprising an inner surface 224. The wall 222 may be cylindrical. In embodiments where the housing 200 comprises the first and second housing parts 210, 220, the wall 222 is part of the second housing part 220.

[0048] The first bore 206 may be defined by the wall 222 of the housing 200. The inner surface 224 of the wall 222 and an outer edge of the auger blade 118 may define a separation X therebetween. Fig. 2 contains a magnified view to show the position ofseparation X more clearly. The separation X may be between about 3mm to about 10mm. In some embodiments, the separation X is between about 5mm to 10mm. In some embodiments, the separation X is between about 5mm to 7mm. In some embodiments, the separation X is 5mm. The separation X is important to allow sufficient clearance between the inner surface 224 and the outer edge of the auger blade 118 while assisting the blade 118 to draw wet concrete along the bore 206. Reducing the size of the separation X generally facilitates the blade 118 to draw wet concrete. If the size of the separation X is too large, the wet concrete may slide off the outer edge of the auger blade 118 and fall back towards the inlet 102. If the size of the separation X is too small, the wet concrete may become stuck between the outer edge of the auger blade 118 and the inner surface 224.

[0049] A pitch Y of the auger blade 118 may be between about 0.2m and about 0.3m.

[0050] The drainage conduit 240 may define a second bore 244 in fluid communication with the first bore 206. The drainage conduit 240 may extend from the housing 200 at a position adjacent to the blade 118 of the auger 110. In some embodiments, the drainage conduit 240 extends from the housing 200 at a position adjacent an upper end 119 of the blade 118. During operation of the drive mechanism 120 to drive the auger 110 while the second end 204 is submerged in wet concrete, the apparatus 100 is configured to extract wet concrete into the second end 110. The wet concrete may travel along the first bore 206 and through the second bore 244 of the drainage conduit 240. An inside diameter of the second bore 244 of the drainage conduit 240 may be between about 0.15m to about 0.20m.

[0051] The drive mechanism 120 may be pneumatically operated. The drive mechanism may be configured to drive the auger at between about 30 revolutions per minute (RPM) and about 80 RPM. The drive mechanism may be configured to drive the auger 110 at a torque in the range of around 1600 to 7000 Newton-metres (Nm), for example in the range of about 1685 - 6931 Nm.

[0052] Fig. 4 is a schematic illustration of a vehicle or machine 410, in the example form of an excavator, with the apparatus 100 coupled thereto. The vehicle or machine 410 has a movable arm 420 to which the apparatus can be coupled, for example using standard excavator coupling mechanisms. The arm 420 is connected at a proximal end to a main body of the vehicle or machine 410 and has a distal end with an end coupling 145 to which the attachment mechanism 140 is coupleable. The attachment mechanism 140 is preferably configured to be suitable for coupling to end coupling 145 using standard mechanical couplings, as well as hydraulic and / or electric couplings. The vehicle or machine 410 may have a control system 430 that is operable by user- manipulable controls 440 to allow an operator to control operation of the apparatus 100 via the attachment mechanism 140 and end coupling 145. The control system 430 preferably includes suitable hydraulic controls extending along the arm 420 to drive the drive mechanism 120, for example such as by starting or stopping rotation of the auger 110 or varying the speed of rotation of the auger 110. Alternatively or in addition, the control system 430 includes suitable electric controls extending along the arm 420 to drive the drive mechanism 120.

[0053] Fig. 3 shows a method 300 of wet concrete extraction. The method 300 may be used for remediation or removal of over-poured concrete. The method 300 may comprise coupling an apparatus to a vehicle or machine 410, such as the apparatus 100 including the cylindrical housing 200, the auger 110, the drainage conduit 240 and a drive mechanism 120.

[0054] The method 300 may comprise coupling the attachment mechanism 140 of the apparatus 100 to the arm 420 of the vehicle or machine 410, at 310. The method 300 may comprise coupling hydraulic controls of the apparatus 100 to the vehicle’s hydraulic control system 430, at 320. Alternatively or in addition, 320 may include coupling electric controls of the apparatus 100 to the vehicle’s electric control system 430. The method 300 may comprise coupling the drive mechanism 120 to a control system 430 of the vehicle or machine 410.

[0055] The method 300 may comprise positioning the apparatus 100 by moving the vehicle or machine 410 and / or arm 420 having the apparatus 100 coupled thereto. The method 300 may comprise positioning the apparatus 100 by orienting the cylindrical housing 200 at between about 0° to about 20° relative to vertical, for example. In another example, the housing may be oriented at a greater range of angles, such as between about 0° to about 45° relative to vertical.

[0056] The method 300 may comprise positioning the apparatus 100 so that the lower end is submerged in wet concrete 152, such as at 330. The lower end may include the inlet 102 or the second end 204. In some embodiments, operation 330 comprises positioning an open end of the cylindrical housing 200 of the apparatus 100 and submerging the open end in wet concrete 152. The cylindrical housing 200 may contain an auger configured to be submerged in wet concrete, such as the auger 110.

[0057] The method 300 may comprise operating the auger 110, for example by driving the drive mechanism 120, to draw the wet concrete 152 up the cylindrical housing 200 to the drainage conduit 240 that is in fluid communication with a bore of the cylindrical housing 200. The wet concrete 152 drawn out of pit 150 may flow out of the drainage conduit 240, at 340. The wet concrete 152 may flow away from the auger 110 along the drainage conduit 240 to a drainage location 460, for example via the flexible hose 250. Wet concrete 409, having been drawn from the pit 150 and transported to the drainage location 460, can then be disposed of appropriately.

[0058] Operation of the auger 110 may include operating use-manipulable controls 440 of the control system 430 of the vehicle or machine 410 to drive rotation of the auger 110 in the cylindrical housing 200. Operation of the auger 110 may comprise operating the controls of the vehicle or machine 410 to drive rotation of the auger at between about 30 RPM and about 80 RPM.

[0059] In some circumstances, the apparatus 100 housing 200 may be lowered until the amount of wet concrete in the pit 150 decreases to the desired or target level. For example, the housing may only be inserted partly into the wet concrete to avoid anexcessive amount entering the housing 200 before the auger 110 is rotating to siphon the wet concrete towards the outlet 104. This may reduce clogging of the housing 200. As the wet concrete level falls, the housing 200 may be inserted (e.g. by operation of the user-manipulable controls 440 to move the arm 420) further into the wet concrete, with this gradual lowering and siphoning process repeated until the target level is reached.

[0060] Once a target amount of wet concrete has been extracted, the method 300 may comprise ceasing operation of the auger 110 and withdrawing the lower end from the wet concrete, at 350.

[0061] It will be appreciated by persons skilled in the art that numerous variations and / or modifications may be made to the above-described embodiments, without departing from the broad general scope of the present disclosure. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive.

Claims

CLAIMS:

1. Apparatus for wet concrete extraction, the apparatus including: an elongated cylindrical housing having a closed first end and an open second end and defining a first bore in fluid communication with the second end; an auger disposed to rotate in the first bore of the housing; a drive mechanism in the first end to drive the auger; an attachment mechanism coupled to the first end to enable attachment of the apparatus to a vehicle; and a drainage conduit defining a second bore and extending from the housing at a position adjacent an upper end of a blade of the auger; wherein, in operation of the drive mechanism to drive the auger while the second end is submerged in wet concrete, the apparatus is configured to extract wet concrete into the second end, along the first bore and out of the second bore of the drainage conduit.

2. The apparatus of claim 1, further including a flexible hose couplable to the drainage conduit to allow drainage of extracted wet concrete to a location away from the second end.

3. The apparatus of claim 1 or claim 2, wherein the drive mechanism is pneumatically operated.

4. The apparatus of any one of claims 1 to 3, wherein the housing includes an access aperture at a position between the drainage conduit and the first end.

5. The apparatus of claim 4, wherein the auger is coupled to the drive mechanism by a release mechanism, and wherein the release mechanism is accessible through the access aperture.

6. The apparatus of any one of claims 1 to 5, wherein the attachment mechanism is configured for coupling to an excavator arm.

7. The apparatus of any one of claims 1 to 6, wherein the first bore is defined by a cylindrical wall of the housing and separation between an outer edge of a blade of the auger and an inner surface of the cylindrical wall is between about 5mm to about 10mm.

8. The apparatus of any one of claims 1 to 7, wherein a length of the housing from the first end to the second end is between about Im to about 2.5m.

9. The apparatus of any one of claims 1 to 8, wherein a length of the housing from the first end to the drainage conduit is about 0.4m to about 0.6m.

10. The apparatus of any one of claims 1 to 9, wherein an outside diameter of the housing is between about 0.25m to about 0.35m.

11. The apparatus of any one of claims 1 to 10, wherein an inside diameter of the drainage conduit is between about 0.15m to about 0.20m.

12. The apparatus of any one of claims 1 to 11, wherein a pitch of the auger blade is between about 0.2m and about 0.3m.

13. The apparatus of any one of claims 1 to 12, wherein the drive mechanism is configured to drive the auger at between about 30 revolutions per minute (RPM) and about 80 RPM.

14. The apparatus of any one of claims 1 to 13, wherein the housing is separable into first and second housing parts by release of one or more couplings, wherein the first housing part includes the first end and the drive mechanism and the second housing part includes the second end and the drainage conduit.

15. A vehicle having coupled thereto the apparatus of any one of claims 1 to 14 and configured to provide power and control to operate the apparatus.

16. A method of remediation of over-poured concrete, including:positioning an open end of a cylindrical housing containing an auger to be submerged in wet concrete; operating the auger to draw the wet concrete up the cylindrical housing to a drainage conduit that is in fluid communication with a bore of the cylindrical housing to cause the wet concrete to flow away from the auger along the drainage conduit to a drainage location.

17. The method of claim 16, wherein the positioning includes orienting the cylindrical housing at between about 0° to about 20° relative to vertical.

18. The method of claim 16 or claim 17, further including, prior to the positioning, coupling an apparatus to a vehicle, the apparatus including the cylindrical housing, the auger, the drainage conduit and a drive mechanism.

19. The method of claim 18, wherein the positioning includes moving the vehicle having the apparatus coupled thereto.

20. The method of claim 18 or claim 19, wherein the coupling includes coupling the drive mechanism to a control system of the vehicle, and the operating includes operating controls of the control system of the vehicle to drive rotation of the auger in the cylindrical housing.

21. The method of claim 20, wherein operating the controls includes driving rotation of the auger at between about 30 RPM and about 80 RPM.

22. A method of wet concrete extraction, including: positioning an open end of the cylindrical housing of the apparatus of any one of claims 1 to 14 to be submerged in wet concrete; operating the auger to draw the wet concrete up the cylindrical housing to the drainage conduit to cause the wet concrete to flow away from the auger along the drainage conduit to a drainage location.

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