Abstract: A display unit for a road machine includes a display and processing circuitry. The road machine includes a tractor, a hopper installed in front of the tractor to receive a paving material, a conveyor configured to feed the paving material in the hopper to the back side of the tractor, a screw configured to lay and spread the paving material fed by the conveyor behind the tractor, a screed configured to lay and level the paving material laid and spread by the screw behind the screw, and an information obtaining device configured to obtain information on road pavement. The processing circuitry of the display unit is configured to predict a future event based on the information on the road pavement obtained by the information obtaining device, and to display information on the event on a road map on the display.

Abstract: A method can include removing material from surface material to regrade the surface material to include a declining elevation between a first point and a second point to eliminate ponding on the surface material between the first point and the second point.

Abstract: An adjustable stroke mechanism has a housing with a central axis and a wall defining a cavity. At least one counterweight is movably disposed, at least partially, within the cavity. A mounting assembly is disposed, at least partially, within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjustor couples the at least one counterweight with the mounting assembly. The stroke adjustor enables the counterweight and mounting assembly to move with respect to one another such that a distance between the counterweight and the mounting assembly may be variably adjusted which, in turn, variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing.

Abstract: A screw jack assembly includes a first body defining a longitudinal axis and a screw drive disposed within the first body. The screw jack assembly also includes a second body movable relative to the first body and coupled to the screw drive, and a first gear coupled to the screw drive. The screw jack assembly further includes a handle assembly having a tube member coupled to the first body. The handle assembly also includes a second gear coupled to the first gear. The handle assembly further includes a handle member coupled to the second gear and adapted to rotate about a rotational axis substantially perpendicular to the longitudinal axis. The handle member is adapted to selectively rotate between an operating position and a stowed position about the longitudinal axis based, at least in part, on rotation of the tube member relative to the first body along the longitudinal axis.

Abstract: A paving machine is disclosed. The paving machine may have a screed assembly having a left screed section and a right screed section. The paving machine may also have a crown actuator configured to pivot the left and right screed sections about the centerline. The paving machine may have a crown profile sensor configured to detect the crown profile (DP), and a cross slope sensor configured to detect a cross slope (QNL*, QNR*) of the screed assembly. Further, the paving machine may have a controller configured to determine the crown profile (DP) and a cross slope (QNL*, QNR*) of the screed assembly. The controller may calculate a left cross slope (QNL) of the left screed section and a right cross slope (QNR) of the right screed section based on the determined crown profile (DP) and the determined cross slope (QNL*, QNR*), and display the crown profile on the display device.

Abstract: In a slipform paver with a tractor including a machine frame with longitudinal members and telescopable cross members, the machine frame comprises a central frame module in which the cross members are supported in a telescopable fashion. A mold adjustable to the working width comprises at least one permanent central mold element fixed relative to the central frame module and at least one permanent outer mold element movable relative to the central frame module. The permanent outer mold element is permanently attached to one of the cross members and/or one of the longitudinal members and the outer mold element is movable together with the cross member and/or the longitudinal member during the adjustment of the working width of the machine frame.

Abstract: An edge forming apparatus for a paving machine forms margins of road paving materials concomitantly with a paving operation. A tube member having a slidably engaged elongated member is included. Lock plates, having lock-plate openings, are positionably engaged with the elongated member. A shaping plate is adjustably coupled with the lock plates and includes offset strips, with apertures, fixedly attached thereto. An offset pin is selectively positioned in the lock plates and extends through the lock-plate openings and the apertures. The lock plates are positionably movable with the elongated member, positioning the shaping plate in one of a retracted position and an angled position. The shaping plate is restricted from substantial rotation through an engagement of the shaping plate with the tube member through a non-rotatable fit between the tube member and the elongated member in response to contact between the shaping plate and the road paving materials.

Abstract: A surface preparation system, such as for surface milling, may comprise a degradation drum comprising a plurality of picks disposed on a vehicle to degrade a surface. A jet system may clean the surface with fluid after degradation. A roller comprising an absorbent material may then absorb fluid left on the surface.

Abstract: An angled endgate assembly adapted to produce an edge on an asphalt mat. The preferred angled endgate assembly comprises a frame that is adapted to be attached to an item of asphalt paving equipment. The preferred angled endgate assembly also comprises an edger assembly that is attached to the frame and has an asphalt contacting surface. The preferred asphalt contacting surface tapers from a minimal compaction portion to a maximum compaction portion. The preferred angled endgate further comprises a means for moving the edger assembly relative to the frame. The method of the invention comprises providing an angled endgate assembly adapted to produce an edge on an asphalt mat. The method also comprises compacting the edge of the asphalt mat.

Abstract: A paving machine includes a screed. The screed further includes an endgate, a mount, a platform, and a pavement edge forming member. The pavement edge forming member has a longitudinal member and a shaping plate coupled to the longitudinal member and is inclined at an angle to a non-paved surface. The shaping plate is configured to form a ramped surface between a mat and the non-paved surface.

Abstract: An apparatus for shaping pavement, the apparatus comprising a pavement-shaping member for receiving a flow of shapeless pavement material and generating a flow of shaped pavement material and a paving machine mount, mechanically coupled to the pavement-shaping member, for coupling the pavement-shaping member to a paving machine, the pavement-shaping member comprising a detachable forming shoe for producing the shaped pavement material.

Abstract: A self propelled slipform paver apparatus includes a chassis, a plurality of ground engaging supports, and a plurality of lifting columns extending between the chassis and the ground engaging supports. A chassis mounting unit is connected to the chassis. A mold for flowable material is also included. A mold mounting unit is connected to the mold. One of the chassis mounting unit and the mold mounting unit includes at least one front claw-like fastening member and at least one rear claw-like fastening member. The claw-like fastening members are open in the same direction either in the direction of operation or opposite to the direction of operation. The other of the chassis mounting unit and the mold mounting unit includes at least one front mating member and at least one rear mating member. The mating members are shaped and arranged to be received in the claw-like fastening members.

Abstract: A screed extension is selectively connected to opposing sides of a paving screed used to lay a blacktop over large surfaces to create a wedge notch joint for merging with an adjacent swath of blacktop. The screed extension includes a positionable base plate that can be oriented at a selective depth relative to the screed. The base plate is connected to linear actuators through a gear box corresponding to opposing sides of the base plate to position the corresponding side of the base plate at a selected height to orient the base plate in a sloped configuration to form the wedge notch joint along a side of a course of blacktop. The base plate supports a vibration unit providing compaction to the wedge notch joint as the course of blacktop is being deposited, thus providing a dense joint between adjacent swaths of a course of blacktop.

Abstract: In a road construction machine (1) for the treatment of road surfaces with a milling drum (3) height-adjustable with regard to the milling depth, with a leveling device (4) with at least one controller (6a, 6c) which receives set values for the milling depth and/or the slope of the milling drum (3), and with at least one exchangeable sensor (A, B, C) or with several switchable sensors for registering the current actual value of the milling depth and/or the slope of the milling drum (3) relative to a reference surface, where the controller (6a, 6c) effects a milling depth control and/or a slope control for the milling drum (3) conditional on pre-determined set values and the currently measured actual values of the at least one sensor (A, B, C) by returning an adjustment value for achieving or maintaining the set value during the milling operation, where the leveling device (4) is provided with an indication and setting device (2) for indicating and setting operating parameters for the at least one sensor (A, B

Abstract: A machine for paving concrete paths, of the type in which a concrete mix, in a plastic condition, is spread over a certain width, and is then levelled to a certain height. The machine includes a tractor and a levelling section connected to it, wherein the working width of the tractor and levelling section are adjustable and wherein the adjustment of the working width of the tractor is independent of the adjustment of the working width of the levelling section. The tractor is provided with an element whose width is adjustable and which distributes the concrete mix over a certain width and to a certain height.

Abstract: A hand-controlled, curb forming machine that is transformable between different widths and geometries, and between different wheel configurations, to accommodate different concrete curbing. A downwardly projecting, rotating head that rotates about an axis perpendicular to the slab shapes raw concrete into appropriately styled and contoured curbs. A machine frame slidably receives an adjustable, wheeled subframe. A roller on the opposite frame side rides on an opposite curb form. A pivoted handle is reversible. The electric motor is adjustably secured to the frame by a mounting plate movable within follower slots in the frame. A removable adaptor plate disposed on an opposite frame end supports the machine when not in use, but can be removed for normal curb work exposing a form riding roller. When the machine is deployed with monolithic curbs without rebar, the adaptor plate can mount to the subframe to raise the machine by lowering the wheels.

Abstract: In a paving screed E for a road paver F, the paving screed E comprises a base screed G and extension screeds A at the front side of the base screed, the extension screeds A being extendable and retractable and pivotable relative to the base screed G, a base guiding structure 18 pivotable relative to the base screed G, a guiding sub-structure 17 slidably guided in the base guiding structure 16, an extension guiding structure 16 slidably guided in the guiding sub-structure 17, and a sole plate frame structure 14 mounted to the extension guiding structure 16 and carrying an extension screed sole plate 11, substantially vertical guidances 20 and elevation adjustment assemblies 21 between the sole plate frame structure 14 and the extension guiding structure 16, the vertical guidances 20 and the elevation adjustment assemblies 21 facilitating to adjust the elevation of the sole plate frame structure 14 and the extension screed sole plate 11 parallel to itself and relative to the extension guiding structure 16.

Abstract: The invention relates to a slipform paver having a chassis 2 able to be adjusted in the heightwise direction and having a mounting unit 10 arranged on the chassis for fastening on an arrangement 8 for molding flowable material. The slipform paver according to the invention is characterised in that the mounting unit 10 for fastening on the concrete mold 8 is mounted on the chassis 2 of the paver to be pivotable on an axis 14 extending in the direction of operation of the slipform paver. To produce parts of a structure whose orientation varies along their length, the concrete mold fastened 8 to the mounting unit is pivoted on the axis of pivot 14 by means of a pivoter unit 15 whereas the chassis of the paver maintains its orientation.

Abstract: A method for designing a haul road based on machine performance comprises receiving one or more haul road parameters and identifying at least one type of machine to be operated on the haul road. The method also includes selecting at least one target operating parameter associated with the at least one type of machine and simulating performance of the at least one type of machine to predict an operating value corresponding with the at least one target operating parameter. If the predicted operating value is not within a threshold range of the corresponding target operating parameter, one or more haul road parameters are adjusted.

Abstract: A system and method are provided for increasing the width of an existing roadway. The system incorporates a reverse-oriented retaining wall and soil nail supports. The retaining wall is formed by a first set of soil nails, wire mesh material, and one or more geotextile material layers. An alternate embodiment forms the retaining wall with a plurality of concrete blocks stacked and spaced to form a block wall. The blocks are mounted over the first set of nails and can be filled with mortar. Backfill material fills a gap between the existing sloping surface and the retaining wall. A second set of soil nails can be provided for additional subsurface support. An upper surface of the backfill material can be paved to form the extended roadway width. The cantilevered configuration of the reverse-oriented retaining wall provides a solution for a less costly retaining wall structure.

Abstract: A multipurpose asphalt processor and method for repairing damaged asphalt. The asphalt processor may be used to both till and screed asphalt surfaces. The asphalt processor may include a powered shaft having a plurality of tines extending therefrom. The outermost tines on the shaft may be angled to thereby form a beveled surface along the edges of tilled area of asphalt. The asphalt processor may further include a screed for leveling tilled asphalt. The asphalt processor may take the form of an attachment for use with existing machinery, such as a tractor.

Abstract: A ballast retaining structure according to the present invention is a ballast retaining structure in which ballast laid on the roadbed is tamped to thereby retain a track bed extended in an extending direction of the roadbed from a transverse direction thereof, and includes a layered body formed by a plurality of bag-like objects, each being formed in a bag shape and containing the ballast, which are stacked from a toe of slope to a top of slope of the track bed such that each of the bag-like objects is tilted to decline from an outer end portion to an inner end portion thereof.

Abstract: In a road construction machine (1) for the treatment of road surfaces with a milling drum (3) height-adjustable with regard to the milling depth, with a leveling device (4) with at least one controller (6a, 6c) which receives set values for the milling depth and/or the slope of the milling drum (3), and with at least one exchangeable sensor (A, B, C) or with several switchable sensors for registering the current actual value of the milling depth and/or the slope of the milling drum (3) relative to a reference surface, where the controller (6a, 6c) effects a milling depth control and/or a slope control for the milling drum (3) conditional on pre-determined set values and the currently measured actual values of the at least one sensor (A, B, C) by returning an adjustment value for achieving or maintaining the set value during the milling operation, where the leveling device (4) is provided with an indication and setting device (2) for indicating and setting operating parameters for the at least one sensor (A, B

Abstract: An apparatus for shaping pavement, the apparatus comprising: a pavement-shaping member for receiving a flow of shapeless pavement material and generating a flow of shaped pavement material; and a paving machine mount, operably coupled to the pavement-shaping member, for coupling the pavement-shaping member to a paving machine, the pavement-shaping member comprising a concave pavement-shaping surface being disposed at a pavement ramp angle less than about 45 degrees and having a single radius of curvature less than about 60 inches.

Abstract: A method and apparatus for screeding post tensioned concrete slabs includes providing a screeding device having a wheeled support having a frame portion and spaced apart wheels rotatably mounted to the frame portion. The screeding device has a screed head mounted to the wheeled support. The screed head includes a vibrating member and a grade setting device adjustably mounted to the vibrating member. The vibrating member is at least partially supportable on the uncured concrete surface, and the grade setting device is adjustable relative to the vibrating member to strike off excess uncured concrete in front of the vibrating member to establish the desired grade or level of the uncured concrete. The screed head may be pivotable relative to the wheeled support about a longitudinal pivot axis extending along the screeding device and in the direction of travel of the screeding device.

Abstract: A road repair tractor adapted for smoothing asphalt that has been laid into a work-trench, dug in a roadway. The tractor includes a body supporting an engine and defining a cockpit. Also, laterally spaced first and second support and motive force assemblies are operatively driven by the engine and support the body. A smoothing device is supported by the body and has a width that is adjustable from a most narrow width of between 10 cm and 30 cm to a widest width of between 1 meter and 2.5 meters. The smoothing device also includes a smoothing blade assembly, having a bottom edge, deployed between a pair of asphalt side-spill guards. Finally, a power actuating system includes controls located in the cockpit that permit a user seated in the cockpit to change the adjustable width of the smoothing device and to raise and lower the smoothing device relative to the body.

Abstract: A road shoulder working, grooming and compacting apparatus is configured to demountably cooperate with self-propelled operator-controlled machines. The apparatus comprises a first component for controllably working an outer portion of a road shoulder region to urge granular aggregate materials therefrom toward and onto a road surface, a second component positioned posterior to the first component and vertically movable between disengaged and engaged positions for controllably transferring granular aggregate material from a road surface to a road shoulder region, and a third component positioned posterior the second component for controllably distributing, grooming and compacting granular aggregate materials contained within the road shoulder region. The first and third components are movable between raised retracted positions and laterally-deployed lowered positions for engaging and working road shoulder regions while the self-propelled operator-controllable machine travels along a road surface.

Abstract: A permeable paver having water permeability of on average about 1 inch per hour and compressive strength of an average of about 8000 psi, the paver manufactured by forming the mixture into predetermined sizes, shapes and colors as desired, utilizing a hydraulic-type or equivalent compacting block forming machine.

Abstract: A road grader comprising an elongated grader blade adapted to be pushed by a vehicle such as a bulldozer and having mutually parallel side members attached to the lateral ends of the blade perpendicularly to the blade's longitudinal axis, each of said side members comprising a pair of spaced apart walls that house a slidable mounting plate on the lower end of which is attached a ground contacting skid. Each slidable mounting plate is separately actuated to move upwardly or downwardly with respect to the side member in which it is housed. Relative upward or downward movement of the side member, with respect to the ground contacting skid, results in lowering or elevating the respective ends of the grader blade with respect to the level of the respective ground contacting skid. Separately adjusting the height of the lateral ends of the grader blade and driving the blade by a pushing vehicle permits the precision depth application of a layer of road material at any desired angle or tilt.

Abstract: In one aspect of the invention a method includes the steps of providing a channel attached to a vehicle adapted to transverse an area, the channel being in communication with at least one supply of pavement rejuvenation material, and the area having a layer of pavement aggregate; positioning the channel so that at least a portion of the channel is disposed within the layer; and adding the pavement rejuvenation material into the layer from an opening in the channel positioned below the surface of the layer.

Abstract: A screed attachment is provided for an industrial vehicle, such as a skid steer vehicle. The attachment includes a pair of extendable beam assemblies and a mounting structure configured to support the beam assemblies on the forward attachment point of the vehicle. The beam assemblies are set apart sufficient for the skid steer to drive between the assemblies to engage the mounting structure. Legs are provided to support the beam assemblies when the screed attachment is in use. The screed attachment includes a screed plate supported by the extendable beam of the beam assemblies so that the screed plate can be extended over a concrete pour and retracted along the pour to perform the screeding operation. The screed plate is vertically adjustable and may be under the control of a laser leveling system.

Abstract: Disclosed herein is a system and method for computer assisted driving of vehicles. The system disclosed herein provides an array of sensors positioned in the vehicles at strategic points for capturing vibrations and sound induced, when the vehicles move over pavement surfaces marked with predefined patterns of peaks and troughs. The sensors further measure frequencies of these vibrations. An onboard computer on the vehicle matches the captured frequencies and sound against pre-specified frequencies to obtain unique frequency signatures for the segment of the pavement traversed by the vehicle. Navigational data and geographical data associated with the unique frequency signature are used to provide assistance in driving of vehicles.

Abstract: A road shoulder working, grooming and compacting apparatus is configured to demountably cooperate with self-propelled operator-controlled machines. The apparatus comprises a first component for controllably working an outer portion of a road shoulder region to urge granular aggregate materials therefrom toward and onto a road surface, a second component positioned posterior to the first component and vertically movable between disengaged and engaged positions for controllably transferring granular aggregate material from a road surface to a road shoulder region, and a third component positioned posterior the second component for controllably distributing, grooming and compacting granular aggregate materials contained within the road shoulder region. The first and third components are movable between raised retracted positions and laterally-deployed lowered positions for engaging and working road shoulder regions while the self-propelled operator-controllable machine travels along a road surface.

Abstract: An apparatus (10) for creating a sloped surface comprising at least one leveling member (12) and at least one guide member (36) for guiding the at least one leveling member (12). The at least one leveling member (12) changes the slope of the surface depending on a distance between a point of low elevation (54) to a point of higher elevation as the at least one leveling member (12) travels across the at least one guide member (36).

Abstract: A slipform sled for paving street curbs and gutters has a hopper and a curb and gutter mold. A pivoting mold assembly having a standard curb elevation mold and a driveway curb elevation mold is mounted on the slipform sled. The pivoting mold assembly pivots on a shaft oriented parallel to the direction of motion of the slipform sled. Paving material is flowed into the hopper and is extruded through the standard curb mold or the driveway curb mold while the sled is moving providing a smooth uniform finish. Only the relatively small transition section between the standard curb and driveway curb needs hand finishing. The elevation of a vibrator in the hopper is changed to correspond to the elevation of the curb extruded.

Abstract: A comminution machine included in an earth working machine which can be moved over a terrestrial area to be worked in a direction of working comprises a rotating roller comminution device. A grader blade is mounted on the comminution machine down stream from the comminution device in the direction of working.

Abstract: A segmented concrete screed for screeding concrete on a concrete casting bed includes a plurality of individual screed units each of which may be raised and lowered independently of the others such that screeding operations may selectively bypass obstructions in the concrete to be screeded.

Abstract: The dropped curb finisher is for use with a slip form paving machines for forming continuous curbs and gutters. The dropped curb finisher has a vertical mounting plate, a finishing plate, an end plate and a vibrator for imparting vibration to the end plate and the finishing plate. The finishing plate extends rearwardly from the bottom edge of the mounting plate and the end plate inclines upwardly from the end of the finishing plate remote from the mounting plate. In another embodiment the present invention comprises a method of forming a dropped curb with a slip form paving machine for forming continuous curbs and gutters.

Abstract: An apparatus for applying a traffic stripe to a surface comprising a comb gate for permitting compound to be released from a tractive box through a comb for a contoured or profiled traffic stripe and a base gate for compound to be released for a standard or flat traffic stripe.

Abstract: A pavement ramp edge maker, paving machine and related method are provided for generating a pavement edge ramp that is equal to or less than approximately 45° relative to a surface upon which the ramp is formed. The edge maker generates a ramp that is partially compacted using a compaction member that is independently vertically movable against a bias during operation. When the pavement mat is compacted, the resulting ramp has an angle that is equal to or less than approximately 45° relative to a surface upon which the ramp is formed.

Abstract: A side plate system for a slip-form paver apparatus includes a side plate in contact with a finishing pan, a vertically extendable and retractable tube assembly between the side plate and the frame of the paver apparatus, a set screw device for setting a batter angle of the side plate by pivoting the tube assembly and a thumbscrew device for maintaining a seal between the side plate and the finishing pan by closing any gap therebetween.

Abstract: A pavement ramp edge maker, paving machine and related method are provided for generating a pavement edge ramp that is equal to or less than approximately 45° relative to a surface upon which the ramp is formed. The edge maker generates a ramp that is partially compacted using a compaction surface that extends upwardly from a bottom edge of an end gate of a paving machine. When the pavement mat is compacted, the resulting ramp has an angle that is equal to or less than approximately 45° relative to a surface upon which the ramp is formed.

Abstract: A paving machine arranged to spread and level concrete along a path. The paving machine has a frame assembly, and at least one concrete pressing device carried by the frame assembly. The processing device includes at least two mutually screed elements spanning the width of the frame assembly and are mutually adjustable in height relative to the frame assembly. The paving machine further includes a control device that positions the at least two screed elements relative to the frame assembly.

Abstract: A pavement ramp edge maker, paving machine and related method are provided for generating a pavement edge ramp that is equal to or less than approximately 45° relative to a surface upon which the ramp is formed. The ramp reduces safety problems relative to drop off edges adjacent a non-repaved area, and increases the life of the pavement by providing a compacted edge. The edge maker generates a ramp that is partially compacted. When the pavement mat is compacted, the resulting ramp has an angle that is equal to or less than approximately 45° relative to a surface upon which the ramp is formed. Alternative embodiments provide for vertical adjustment and adjustable spring bias for the compaction member.

Abstract: A chassis having a main member carries adjustable side members defining an area for the reception of berm forming particulate material conveyed by an air flow from a remote source. The discharged material forms a continuous berm of constant size and shape. Wheel assemblies are adjustably carried enabling the berm cross-sectional shape to best suit the job requirements. Forward travel to the apparatus may be imparted by a steerable tongue assembly.

Abstract: Apparatus for screeding concrete and other materials includes a primary support and a secondary support adjustably slidably movable on the primary support to raise or lower an elongated screed guide member. The secondary support includes a receptacle for holding the elongated screed guide member. Surface engaging support structure is provided at the lower end of the apparatus to disperse downwardly directed forces.

Abstract: An apparatus for paving a narrow gauge trench in a concrete roadway is adapted to be attached to a vehicle having a supply of pressurized hydraulic fluid and includes a frame having opposing ends and operable to be attached to the vehicle. The frame includes a hopper attached at a first end thereof, an auger disposed therein, and a concrete dispensing aperture extending through a lower wall thereof at a second end of the frame opposite the hopper. A strike-off member is hingedly attached to the frame and a roller is hingedly attached to the frame and extends rearwardly of the strike-off member. A hydraulic system is connected to the pressurized hydraulic fluid supply of the vehicle and is operable to control the auger, the roller, and the vertical orientation of the strike-off member and the roller.

Abstract: A subgrade preparation apparatus is operable to level, accurately grade and compact a subgrade surface for receiving a preformed concrete slab on the subgrade, in order to repair a concrete surface. The subgrade preparation apparatus includes a base unit, an extendable boom extending from the base unit, and a screed head assembly vertically adjustable on the extendable boom. The base unit is positionable on the concrete surface being repaired. The screed head assembly is vertically adjustable to be lowered into a cut out area defining the subgrade. Preferably, the screed head assembly includes a plow, auger and/or vibrator for grading, leveling and/or compacting the subgrade surface, and is further operable to grade, level, compact and/or smooth the subgrade surface close to the edges or walls of the cut out area.

Abstract: A chassis having a main member carries adjustable side members defining an area for the reception of berm forming particulate material conveyed by an air flow from a remote source. The discharged material forms a continuous berm of constant size and shape. Wheel assemblies are adjustably carried enabling the berm cross-sectional shape to best suit the job requirements. Forward travel to the apparatus may be imparted by a steerable tongue assembly.

Abstract: A molding device for placement of formed cementitious material such as concrete on a mounting surface. The device is used in combination with a supply of pressurized cementitious material communicated through a hose from a conventional cement pump or the like. It features a mold unit having an a compression chamber at a first end communicating with an extrusion chamber at a second end. Cement material is forced into the compression chambers from the cement pump and extruded from the exit orifice of the extrusion chamber. The device is propelled forward by the pressure from the injected cement against the front of the device and away from the formed material means control any upward travel of said mold unit caused by said internal pressure against said top wall. Weights may be added to the top of the device to limit upward travel and a steering mechanism may be added to the front of the device to steer it on a defined course.