Showing papers on "Screed published in 2011"

Electric screed heat control system and method of heating screed plates

Abstract: In electrically heated screed assemblies, elements that are prone to failure are the temperature sensors (88) Typically, each screed plate (36) has a single temperature sensor (88) When one temperature sensor (88) fails, the controller (70) will look for a working temperature sensor (88) amongst the other screed plates (36) and if more than one temperature sensor (88) is working, the controller (70) will choose the most relevant temperature sensor (88) and use the data from the working temperature sensor (88) to operate the resistive heating elements (51) on the screed plate (36) with the non-functional temperature sensor (88) If the temperature sensor (88) on an outer screed plate (36) fails, the controller (70) will look to the other outer screed plate (36) temperature sensor (88) for data for purposes of operating the resistive heating elements (51) on the outer screed plate (36) with a broken temperature sensor (88) Similarly, if the temperature sensor (88) on an inner or central screed plate (36) fails, the controller (70) will look to a neighboring screed plate (46) with a working temperature sensor (88) for data for purposes of operating the inner or center screed plate (36) with the broken temperature sensor (88) The controller (70) will generate signals for the operator to replace the failed temperature sensor (88)

Road finisher with coating measuring device

Abstract: The paver (100) has a towing machine (50), a movable screed (4) and a measuring device (60) with an inclination sensor for determining a layer thickness of a road pavement (6) that is newly laid by the screed. The measuring device determines the layer thickness at an intended location relative to a direction of travel behind a rear edge (10) of the screed. The measuring device is mounted on the paver to enable determination of the thickness of the layer independently of a geometric shape and/or a movement of the screed. The measuring device is detachably mounted to the towing machine.

Hot in-place recycling ultrathin overlaying machine of bituminous pavement and construction method thereof

Abstract: The invention provides a hot in-place recycling ultrathin overlaying machine of a bituminous pavement and a construction method thereof The hot in-place recycling ultrathin overlaying machine of the bituminous pavement comprises an automobile chassis, an integral power device, an electric control system, a diesel tank, a receiving and transporting device, a material transfer hopper, a horizontal transporting device, a heating device, a hydraulic system, a recycling agent spraying system, a harrowing device, a distributing spiral device, a paving screed device, a cab, and an electric control operating floor, wherein the automobile chassis is a special automobile chassis The hot in-place recycling ultrathin overlaying machine of the bituminous pavement finishes the continuous overlay repair work of the pavement through a series of processes such as receiving the materials, feeding the materials quantitatively, transporting the materials horizontally, spraying the recycling agent, harrowing, heating, distributing and paving the materials, ironing, and grinding and the like, and has the advantage of carrying out one-time maintenance on the defects such as loose, shallow vertical and horizontal cracks, track, slight crack, bituminous aging, pavement seepage and the like of a functional layer of the pavement By adopting the invention, the antiskid resistance of the pavement is restored, the profile of the pavement is corrected, the appearance and the evenness of the pavement are improved, the pavement strength of the pavement is increased, the traffic noise is reduced, and the service life of the pavement is prolonged

Roller screed with dual-drive power unit

Abstract: A powered roller screed ( 366 ) is disclosed, that uses a dual-drive power unit ( 370 ) and a screed roller ( 368 ). A power source ( 372 ) of the dual-drive power unit ( 370 ) includes a first drive output ( 374 ) and a second drive output ( 376 ), which rotate in the same direction and at the same rate. Each of the first drive output ( 374 ) and the second drive output ( 376 ) may be used to rotate the screed roller ( 368 ). For instance, the first drive output ( 374 ) could be attached to a first end of the screed roller ( 368 ), or the second drive output ( 376 ) could be attached to the second end of the screed roller ( 368 ), all to rotate the screed roller ( 368 ) in the same direction as the screed roller ( 368 ) is being pulled over wet concrete ( 364 ).

Screed plate arrangement and method of attaching a screed plate

Abstract: Asphalt paving machine includes screed assembly, plurality of lower and upper plate fasteners, and upper and lower screed plates, each having openings, and an electric heater at least partially disposed between the plates. Upper and lower plate fasteners extend into openings of the respective upper and lower screed plates and bores of a frame portion of the screed assembly to couple the plates to the frame portion. The upper plate fasteners couple the upper screed plate to the frame portion independently of the lower screed plate, so the lower plate is displaceable from the upper plate and the frame portion.

Method for controlling the process when producing a paving mat and road finisher

Abstract: A method for controlling the process laying a layer in a selectable paving thickness with a road finisher in which the laying process is automatically controlled in that a target value for the paving thickness is entered into an automatic closed-loop control system and communicates the actuating signals to such members and the signals. A road finisher has a computerized, either fully automatic or operator aided closed-loop control system for the direct control of the laying process with control of the paving thickness to a predetermined target value and for the optimization of the operating point of the pre-compaction system, which is connected to sensors at least for the acquisition of the setting angle of the screed, of the paving thickness and of the laying rate.

Method and road finisher for laying a compacted finishing layer

Abstract: A method of laying a finishing layer with a road finisher F having a screed B, whereby the screed, equipped with a tamper device T and a smoothing plate, at least compacts and superficially smoothes the finishing layer, and the stroke and/or the frequency of the tamper device T are remotely varied for laying a finishing layer with a paving thickness and/or laying rate V which vary over the pave width and transversely to the working direction R within the pave width. A road finisher having a screed suitable for implementing the method set forth above wherein the road finisher or screed has an adjustment device for the remotely actuated local variation of at least the stroke of the tamper device within the pave width.

Screed heating control

Abstract: A system and method to control heating of a screed assembly in a paving machine is disclosed. The system and method includes providing a plurality of screed elements in communication with a respective one of a plurality of circuit breakers through a respective one of a plurality of relays. The system and method additionally includes providing a control system in communication with the plurality of screed elements and the plurality of relays and, receiving inputs by the control system to generate an output signal based upon the inputs. Heating of each of the plurality of screed elements is accomplished in response to the output signal.

Paving machine with a storage container

Abstract: The invention relates to a self-propelled paving machine for floor coverings respectively cover layers, particularly for synthetic floor coverings respectively resilient base layers, for synthetic coverings for sports surfaces, such as jogging tracks, small playing fields, runways for long jump installations, playgrounds, screed, particularly synthetic resin screed or the like, wherein the material is distributed uniformly over a fill-in width on a prepared under-floor, and pulled off or flattened there by at least one flattening plank, wherein a storage container is provided which is connected with a fill-up area of the paving machine, and the paving machine presents a carriage, and wherein the fill-up area is provided between a rear closing-off of the carriage, viewed in the travel direction, and the flattening plank, wherein a direct delivery of the material from the storage container into the fill-up area is provided.

Light mortar inside and outside combined exterior wall heat-preserving system

Abstract: An external wall insulation system of a lightweight screed inside and outside combination is formed by smearing plaster lightweight screed and cement lightweight screed on the external wall of a building; wherein, the inner side of the external wall is coated with the plaster lightweight screed and the outer side of the external wall is coated with the cement lightweight screed, and both the plaster lightweight screed and the cement lightweight screed comprise lightweight aggregate which contains organosilicone modified expanded perlite. The external wall insulation system has the advantages that: aiming at the different requirements of the inner side and the outer side of the external wall of the building, the inner side of the external wall adopts the plaster lightweight screed and the outer side adopts the cement lightweight screed so as to form the novel insulation structure, thus exerting the function of the two insulation sand pulps and being beneficial to humidity control and fire prevention in the building; the external wall insulation system has the advantages of low coefficient of heat conductivity, excellent intensity index of each item, ensuing safe use, effectively reducing the deadweight of the building and the burden of basis load, extremely simple construction technique, stable physical property, existing no hollowing and crazing after construction, extremely low radioactivity, ensuring the inhabited environment to be healthy and safe as well as wide application scope.

Studio dell'isolamento acustico in laboratorio di materiali provenienti da riciclo applicati alle strutture edilizie

Abstract: The acoustic insulation of elements and materials for building construction is becoming more and more important in Italy due to the recent evolutions in the Italian national regulation. This work concerns the experimental studies on sound insulation and reduction of floors and walls, principally using materials made of recycled rubber and synthetic fibrous panels. In particular, impact noise of floors was investigated, taking also into account the mechanical properties of tested materials. The tests were carried out in a new laboratory, built especially for the evaluation of acoustic properties of building elements. The laboratory has an opening, for testing the transmission loss of walls, and two floors: one is a reference concrete slab and the other is a beam and clay block floor with flanking transmission suppression. The steps of the laboratory construction and the procedure adopted for the qualication of sound fields in the rooms are described in this work. The qualication was carried out for transmission loss and impact noise measurements, with some limitations for the airborne sound insulation of floors. The impact noise of floors was studied considering different issues. The two bare floors acoustic behaviour has been analyzed, pointing out the different sound emission, that is due to the technical characteristics of the building elements. The correlation between impact noise reduction and dynamic stiffness of materials used in floating floors has been studied, in particular as regarding the influence of sample preparation and the choice of the predictive formulas. For some materials, repeated measurements have been carried out, to analyze the influence of the screed aging during impact noise reduction laboratory tests, with the aim of reducing the test waiting time. Impact noise reduction of resilient underfloor heating systems has been investigated: the products have been tested on both laboratory floors to check the influence of the base structure and the evaluation methods; different floor finishings have also been tested. Furthermore, airborne sound reduction of walls was studied to improve the knowledge of the influence of recycled materials (in particular rubber and synthetic fibrous panels) on the acoustic performance of gypsum and covered brick walls. For some of the samples, the influence of electric equipments was also studied.

Plastering screed strip template

Abstract: The utility model provides a plastering screed strip template (10) consisting of a template body (1), a plurality of threaded rods (2) and a plurality of screw nuts (3). The threaded rods (2) are respectively and perpendicularly arranged at a place which is distant from two end surfaces of the template body at 30-50 mm in a penetrating way, one end of each threaded rod is respectively provided with a cusp (21) which can be tightly nailed into a wall body, and the screw nuts (3) capable of adjusting the distance between the template body (1) and each cusp (21) during screwing are adapted on the template body opposite to the other-side threaded rod of each cusp. The threaded rods are nailed into the wall body, and the screw nuts are screwed, so that the contact surface between the template body and the screw nuts is as same as the despooling height, the height of a screed strip can be conveniently adjusted, and the screed strip template is simple in technology, very convenient and quick to set, and lower in requirement of a worker, so that the problem that the plastering height is influenced caused by the deformation of a plaster cake and the screed strip due to the technical problem of the worker or the collision can be avoided. The plastering screed strip template not only can be manually operated, but also can be mechanically operated, so that the levelness and the perpendicularity of a plastered wall surface can be greatly improved, the screed strip is good in rigidity and levelness, and the construction efficiency is improved exponentially.

Paver and screed plate heating system thereof

Abstract: The utility model provides a paver and a screed plate heating system of the paver. The screed plate heating system of the paver comprises a temperature sensor (11), an ignition temperature controller (12), an ignition box (13), an igniter plug (14) and an air valve (15), wherein the ignition temperature controller (12) is connected with the temperature sensor (11) and is used for comparing and judging whether the temperature of a screed plate is lower than a preset ignition temperature or higher than a preset flameout temperature so as to control on-off of a power supply of the ignition box (13), the ignition box (13) is connected with the ignition temperature controller (12) and is used for sending an ignition command or a flameout command, the igniter plug (14) is connected with a first output end of the ignition box (13) and is used for realizing high-pressure ignition of the screed plate according to the ignition or flameout command, and the air valve (15) is connected with a second output end of the ignition box (13). With the adoption of the screed plate heating system, the problems are solved that in the prior art, the heating temperature and the ignition time of the screed plate heating system are difficult to control and that the heating system has poor reliability.

Screed arrangement for a road finisher

Abstract: The invention relates to a screed arrangement for a road finisher with a basic screed and two extending screeds arranged in front of the basic screed in the laying direction of travel of the road finisher and movable transversely to the laying direction of travel relative to the basic screed. A deflection member is fitted to the basic screed and/or to at least one of the extending screeds and is movable relative to it.

Combustion chamber of paver

Abstract: The invention provides a combustion chamber of a paver, which comprises a screed box having a bottom screed, a combustion chamber, a linear heater having a linear heating pipe and a heat-insulating plate which is arranged in the combustion chamber and positioned between the linear heating pipe and the bottom screed. The combustion chamber is capable of solving the problem that the quality of roadpaving is lowered due to the deformation of the bottom screed caused by the local overheat of the bottom screed.

Compacting screed extension for paving

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.

Control device for drawing cylinder of screed plate on paver as well as paver

Abstract: The utility model discloses a control device for a drawing cylinder of a screed plate on a paver, and the paver. The control device comprises a strain transducer (1), a controller (2) and a drawing cylinder pressure control valve (3) positioned on an oil line between a drawing cylinder (6) and a working oil source (8); the strain transducer (1) is connected with the input end of the controller (2) and transmits the deformation quantity of the end part of the screed plate (7) detected in a real-time manner to the controller (2); the output end of the controller (2) is connected with a control end of the drawing cylinder pressure control valve (3); and the paver comprises a paver body, the screed plate (7) and a screed plate drawing mechanism; and the screed plate drawing mechanism comprises the drawing cylinder (6) positioned at the end part of the screed plate (7) and the control device for the drawing cylinder for the screed plate on the paver. The utility model can improve the longitudinal paving flatness and the paving quality, and has the advantages of good pressure regulation real-time performance and simple structure.

Combustor spray nozzle for heating system of screed of paver

Abstract: The utility model discloses a combustor spray nozzle for a heating system of a screed of a paver, which comprises an air inlet pipe (1), a fire-spouting horizontal pipe (2) and a corrugated plate (3), wherein the gas inlet pipe (1) is arranged at the middle part of the fire-spouting horizontal pipe (2) and is communicated with the fire-spouting horizontal pipe (2), the fire-spouting horizontal pipe (2) is provided with a corrugated plate clamping part (2a), a gap is retained between the two clamping side plates of the corrugated plate clamping part (2a), and the corrugated plate (3) is fixed between the two clamping side plates The combustor spray nozzle for the heating system of the screed of the paver has the advantages that the structure is simple, the heating uniformity is improved, the combustion efficiency is improved, the fire is not easy to put out, the reliability is good, and the like

Step ladder device and paver

Abstract: The utility model discloses a step ladder device, which comprises a support assembly and a step ladder assembly, wherein the step ladder assembly is arranged on the support assembly in a sliding way by a sliding pin arranged at the front end of the step ladder assembly, and when the sliding pin slides to the back end of the support assembly, the back end of the step ladder assembly overturns downwards and is supported by the lower part of the support assembly; and when the sliding pin slides to the front end of the support assembly, the back end of the step ladder assembly overturns upwards and is fixed at the upper part of the support assembly. The step ladder device has simple and compact structure, low cost, convenient disassembly and assembly and free folding. The utility model also discloses a paver, which comprises a screed, wherein a pedal is arranged at the back of the screed, and the step ladder device is arranged below the pedal. The paver facilitates operating personnel to go up and down when the screed is hung, and the step ladder device does not affect the normal work of the screed.

Simulation and experimental study on compacting mechanism of asphalt paver

Abstract: In order to study the influence of tamping mechanisms and position of vibrator on screed dynamic characteristic,Multi DOF(degree of freedom) dynamic model for double tamper-single screed system of asphalt concrete paver was established;differential equations of motion was solved via Wilson-θ methods;relationship between vibration parameters and variety of tamping frequency and vibrating frequency and position of vibrator were simulated and analyzed.A paver prototype was tested to verify the results of the theoretical analysis.The results show that treating screed as double DOF rigid body accords with the actual vibration data;Screed gains better service performance when the vibrating frequency is higher than 30Hz and the tamping frequency is lower than 25Hz;Position of vibrator should make composition of forces of vibrator and vibratory exciting force act on the centroid of screed to get higher paving quality.

Road paving machine

Abstract: The invention relates to a paver for the paving of ground courses for roads or the like, having a chassis and a trailed floating screed which is articulated on the latter via tow arms and of which the angle of attack relative to the ground is capable of being adjusted via actuating cylinders and which comprises a basic screed and extendable screeds and/or attached screed parts, there being arranged between the rear region, as seen in the paving direction, of the chassis and the extendable screeds and/or the attached screed parts of each side at least one hydraulic supporting cylinder which, at the moment of start-up of the paver, is subjected to an adjustable hydraulic pressure.

Painting device for a waterproof agent

Abstract: PURPOSE: The pressurizing apparatus of a water repellent agent coater is provided to improve water repellent performance by preventing the damage and the lifting phenomenon of a water repellent layer. CONSTITUTION: A water repellent agent coater(40) includes a main frame(10), a storing tank(20), and a screed blade(30). The main frame includes a handle(11) and a moving wheel(12). The storing tank includes an opening and closing valve(21) and is combined with the upper side of the main frame. The screed blade contained in the main frame is arranged at the rear side of the valve of the storing tank. A protrusion(22) is formed at the external side of the storing tank. A supporter(51) is protruded from a compressive plate(50) which is arranged in the storing tank.

Assembly for leveling new concrete and sub-grade

Abstract: The assembly for leveling new concrete includes a driver that has a guide that is placed in a mounting structure so that the driver may be used to drive the mounting structure into the ground. The driver has both a removable rebar marker and conduit marker so that depending on whether an individual wants to use a screed pipe conduit or rebar as a support structure in their concrete the support structures are properly aligned.

Vertical vibrating screed

Abstract: This invention discloses a method of building concrete walls, columns and other vertical or sloped structures using a vertically oriented vibrating screed and utilization of the thixotropic properties of wet concrete. The vertical screed is a simple, inexpensive and highly flexible apparatus that may be used for a wide variety of applications that involve the applying of cementicious material in the construction of a vertical structure. By using highly thixotropic concrete, the vertical screed is able to place concrete and other cementicious materials in a vertical plane much like concrete is placed with vibrating screeds in the horizontal plane. The vertical screed's applications range from applying a thin cementicious coating to placing concrete in a vertical plane to construct a wall or column. The various configurations of the vertical screed range from a small hand held device to a much larger mechanically controlled apparatus.

Time-temperature double control heating control system for screed of paver

Abstract: The utility model relates to a time-temperature double control heating control system for screed of paver, comprising an igniting control system (1), an air valve (2), a time switch (3), a temperature controller (4) and a temperature sensor (5), wherein the igniting control system (1) is connected with the air valve (2), the time switch (3) and the temperature controller (4) are serially connected on the power supply circuit of the igniting control system (1) sequentially, the temperature sensor (5) is mounted on the screed of a paver, and the temperature sensor (5) is connected with the temperature controller (4). The time-temperature double control heating control system for screed of paver is capable of controlling the heating time and heating temperature with high safety performance.

Portable concrete striking device with auger

Abstract: The portable concrete striking device comprises an elongated portable screed, a handle mounted to the screed for allowing a worker to manually pull the screed towards an upstream direction and an auger rotatably mounted to the screed and located upstream of the screed. A motor is linked to the auger for rotating the auger. The auger is capable of directing excess concrete upstream of the screed towards an excess concrete discharge location which is located at a determined position along the elongated screed.

White screed having high light reflection, spot resistance and easy cleanability

Abstract: The use of a binder system comprising Compounds containing aluminium oxide, Silicon oxide and titanium oxide for producing a screed, in particular a white screed having high light reflection, spot resistance and easy cleanability, characterized in that the sum of the oxides calculated as AI2O3, SiO2 and TiO2 in the binder system is ≥ 41 % by weight, based on the water-free binder system, is proposed.

Stator of an eccentric screw pump

Abstract: Stator of an eccentric screw pump for conveying plaster, mortar, screed, and other media required in the construction technology with a two - or multiply coiled elastomer liner, wherein the ratio of the thickest parts (S1) to the thinnest points (S2) of the elastomeric liner (3) in the region is 3 to 8

Screed and method for constructing concrete build using thereof

Abstract: PURPOSE: A vibrating screed for constructing a road and a gardening structure including a boundary stone pedestal and a side ditch, and a construction method of a structure using the same are provided to form a side ditch and a boundary stone pedestal integrated structure, a boundary stone pedestal, a side ditch connected to one side of a boundary stone, etc. with one process, and to form a structure in the same shape in all sections. CONSTITUTION: A vibrating screed(100) for constructing a road and a gardening structure including a boundary stone pedestal and a side ditch contains: a molding plate(10) forming concrete, which is placed between a pair of forms(1) or a boundary stone and a form, in the shape of a side ditch and a boundary stone pedestal; a handle(20) connected to the molding plate to let a worker move the molding plate; and an aligner(30) supporting the molding plate to the form and aligning to move the molding plate regularly along the form.