Showing papers on "Screed published in 2012"

Integrated paving process control for a paving operation

Abstract: Process control for a paving operation is facilitated by obtaining paving material conveyance information for a time period during which paving material is delivered to a screed of a paver by a material conveyance system and distributed over a surface to be paved. The paving material conveyance information includes data indicating incremental advance of the paving material to the screed of the paver during the period of time and data indicating incremental quantity of the paving material at one or more points of the material conveyance system, both of which are correlated to points in time during the time period at which the data is acquired. Incremental quantity of paving material delivered to the screed is determined to facilitate process control in the paving operation.

Systems and methods for aiming asphalt material feed sensors

Abstract: A system for measuring the height of paving material distributed by an auger of a paving machine in front of a grading implement, such as a screed, is disclosed. The system includes a sonic sensor and a laser pointer. The sonic sensor generates a sonic signal which is directed at the paving material distributed by the auger. The laser pointer generates a laser beam which is similarly directed at the paving material that has been distributed by the auger. The laser beam and the sonic signal meet at a common position on the paving material.

Road paver with measuring device

Abstract: Road paver having a towing machine that is movable on a plane along a work area, and a screed provided to lay a road pavement, and having at least one measuring device configured to generate a point cloud that depicts a three-dimensional condition of the surface of the plane.

Low-cost, energy-efficient building panel assemblies comprised of load and non-load bearing substituent panels

Abstract: This invention relates to building materials and methods. A building assembly for constructing a building includes load bearing structural panels joined and finished with a non-load bearing panels. The load bearing panels comprise a structural concrete insulating panel (SCIP) comprising a pair of wire mesh members sandwiching a middle member comprising polystyrene, wherein each of said wire mesh members defines two outwardly projecting screed ridges. The non-load bearing panels comprise a pair of fiber cement boards sandwiching a polystyrene core. The load bearing SCIP panel is placed in position and then the non-load bearing panel is positioned in a desirous location abutting the SCIP. The SCIP then receives a layer of cementitious material that is cut flat using the screed ridges. The assembled SCIP and non-load bearing composite is then finished with a final finishing layer so that the entire assembly has the same outer appearance.

Road finishing machine

Abstract: The invention relates to a road finishing machine having a screed extending transverse to the working direction of the finishing machine, comprising a base plate that can be heated by means of an electrical heater clamped to the base plate, comprising at least one bar-shaped heating element, wherein the bar-shaped heating element comprises a round tube heating element comprising at least one heating bar fixably supported on individual bolts that can be attached to the base plate and forming heat transfer bridges.

System and method for laying down and compacting an asphalt layer

Abstract: In a system for laying down an asphalt layer made of asphalt material, and having a road paver having a screed with compacting tools, a compacting device and a mixer, an electronic material density module is provided in or for the road paver. The electronic material density module obtains data during the laying process regarding at least the actual degree of compaction of the asphalt layer produced in the area of at least one compacting tool and evaluates and/or documents these data at least for operational optimisation and/or operational monitoring of the road paver and/or compacting device and/or mixer. The data obtained is communicated to the compacting device that produces the final degree of compaction of the asphalt layer based on the data and on the actual degree of compaction determined at the screed.

Automatic Material Height Sensor For Asphalt Pavers

Abstract: A method and apparatus is disclosed for controlling material feed for asphalt pavers. The material feed system includes a screed, feeder conveyor and a spreader auger. A sensor measures a material volume and transmits this information to an electronic control module (ECM). This information may be used as the target material volume, which the ECM may use to calculate a corresponding conveyor speed and auger speed. The sensor monitors the material volume as paving commences, and the ECM maintains the initial calibrated target size by adjusting the auger and conveyor rotational speeds.

Fly-Ash Usage in New Cement-Based Material for Concrete Waterproofing

Abstract: Concrete is the most widely used building material and due to its use, water tightness is one of the factors essential for many constructions. Materials applied on concrete surface as secondary protection can have various forms. One of the material group with waterproofing ability, are materials on so called "crystalline technology base". As this material is cement-based its wide world production brings significant effect on environment. To bring on building materials market new materials should be considered its environmental friendlier production. One of the ways for this group of materials with crystalline abilities is replacing cement by other substituent, at best by secondary raw material. This would bring double advantage, lowering usage of cement and on the other hand use of already produced secondary raw material. This article deals with new developed materials based on "crystalline technology" with cement partly replaced by fly-ash substituent. At this article are presented results of new developed screed and coating modifications and its effectiveness on concrete waterproofing.

Screed extender speed control

Abstract: A control system for an extendable screed includes a first input device configured to set a speed limit for the extendable screed, a second input device configured to vary a speed of the extendable screed within the speed limit The controller further includes, a third input device configured to govern a relationship between a speed of the extendable screed and a relative position of the second input device The control system further includes a controller configured to receive inputs from the first, the second, and the third input devices and output a command signal to move the extendable screed relative to the main screed

Mechanical properties of no-fines bloated slate aggregate concrete for construction application, experimental study

Abstract: The paper presents investigation on the mechanical characteristics of no-fines bloated slate aggregate concrete (BSAC) through laboratory testing. The BSAC concrete employ locally available coarser aggregates formed of slate (clay rock), with no fine aggregates, where aggregate-to-aggregate bond is achieved through water-cement paste resulting in significantly lightweight concrete. Laboratory tests were conducted on cubes and cylinders to estimate the basic mechanical properties i.e. compressive strength, density, stress-strain behavior, Young modulus, etc., of BSAC concrete required in the design and analysis of concrete construction works using engineering tools. The effect of water-cement ratio and aggregate-cement ratio is also investigated for essential optimization. It was found that the strength of no-fines BSAC is lower than that of normal weight concrete, but appears to be sufficiently enough for specialized construction works where compressive stress demand is not very high. Its application in the construction industry may include core work in concrete like sandwich panels, drainage layers under reservoir and basement floors, paving and lightweight screed for leveling of floors and roofs, as a damp-proofing material, etc.

Paver and levelling control device thereof

Abstract: The invention provides a levelling control device of a paver. The device is used for realizing automatic levelling control of the paver and comprises a first sensor and a second sensor, a first levelling controller and a second levelling controller, a first electric part and a second electric part, a screed, and a first tow arm and a second tow arm connecting the first electric part and the second electric part with the screed. The invention also provides the paver comprising the levelling control device. The levelling control device and the paver have the following beneficial effects: the first levelling controller and the second levelling controller respectively send out command signals to the first electric part and the second electric part according to the deviation signals detected by the first sensor and the second sensor thus driving the towing points of the tow arms to rise or fall to realize adjustment of the elevation of the screed of the paver so as to achieve the aim of levelling in the paving process. The levelling control device has the advantages of simple structure, fast dynamic response, high control precision, good maintainability and the like.

Mortar for floating screed during building plastering construction and construction method thereof

Abstract: The invention relates to a mortar for floating screed during building plastering construction, which is mixed from the following components in parts by weight: 25-35 parts of high strength gypsum, 10-15 parts of light-weight aggregate, 54-64 parts of heavy-weight parts and 1.0 part of composite assistant, wherein the light-weight aggregate is an inorganic vitrified hollow microporous material of which the degree of fineness is lower than 100 meshes; the heavy-weight aggregate is common river sand; and each kilogram of composite assistant is mixed from the following components in parts by weight: 0.1 part of redispersible latex powder, 0.3 part of cellulose ether, 0.5 part of water reducing agent and 0.1 part of coagulant. The mortar is diluted by water in the weight proportion of 100:30-50, the mixture is mixed uniformly to achieve the viscosity for mechanical spraying or manual construction, and thus, the mortar can be used for mechanical spraying or manual operation. The mortar has the advantages of light weight, favorable cohesive property with base masonry, quick drying, and simple and practical technique, can quickly form by one time, and can be matched with dies and mechanical construction. The invention has low manufacturing cost per unit area, is suitable for indoor floating screed engineering for all buildings, and has high popularization value. The invention also relates to a construction method of mortar for floating screed during building plastering construction.

Extension mounting system and method for attaching screed extension to screed

Abstract: A screed has an extendible frame portion that includes a catch engaging surface of an extension mounting system. The extendible frame portion is expandable along a lateral extension axis and pivotable about a pivot axis perpendicular to the lateral extension axis. A screed extension has a screed extension frame supporting a mounting catch of the extension mounting system. In a mounting configuration, the extendible frame portion is pivoted to a lowered mounting position, and the extendible frame portion is axially expanded to an extended mounting position in which the catch engaging surface and the mounting catch are vertically aligned. In a lifted configuration, the extendible frame portion is pivoted to a raised lifting position, the catch engaging surface and the mounting catch are in mating engagement, and the screed extension is supported on the extendible frame portion using the extension mounting system.

Road finishing machine

Abstract: A road finishing machine having an extendable screed and including an actuation instrument manually movable by the operator for adjusting the speed of a hydraulic movement actuator of the extendable screed.

Paver screed plate device and paver

Abstract: The utility model provides a paver screed plate device and a paver, wherein the paver screed plate device comprises a basic screed plate, a first lengthening screed plate and a second lengthening screed plate which are spliced in sequence, and also comprises a support rod bracket, a first strengthening support rod and a second strengthening support rod, wherein the support rod bracket is pivoted with the first lengthening screed plate, the first strengthening support rod comprises a first end and a second end, the first end of the first strengthening support rod is pivoted with the basic screed plate, the second end of the first strengthening support rod is pivoted with the support rod bracket, the second strengthening support rod comprises a first end and a second end, the first end of the second strengthening support rod is pivoted to the support rod bracket, and the second end of the second strengthening support rod is pivoted with the second lengthening screed plate. According to the paver, the paver screed plate device is arranged. In the utility model, adopting the technical scheme, the effect of improving the whole rigidity of paver screed plates is achieved.

Parameter optimization for compacting system of asphalt paver based on response surface method

Abstract: An experimental research on a paver prototype shows that the maximal vibration amplitude along the screed length is almost two times greater than the minimal.In order to decrease the amplitude difference in screed,the screed was thought as a flexible body and a coupled rigid and flexible model for compacting system of asphalt concrete paver was established.The mass of tampers and the product of mass and eccentric distance of the eccentric shaft were selected as optimization parameters,and the minimal amplitude difference in screed was taken as the target.A functional expression with respect to the target and the optimization parameters was built through response surface method based on orthogonal design and numerical calculation.The optimization results show that the amplitude difference in screed decreases by 83% after optimization and the nonuniformity of amplitude in asphalt paver screed is improved effectively.

Screed heating device, screed and spreading machine

Abstract: The utility model provides a screed heating device which comprises at least one infrared heating device which is arranged above a bottom plate of a screen and at least one electric heating device which is in contact with a vibration blade to heat the vibration blade The utility mode further provides the screed and a spreading machine By means of the technical scheme, heating speed on the screed is quick, heat loss is low, the screed can be heated evenly, and construction quality can be improved

Mineral composition for producing electric heating layers

Abstract: The invention relates to a composition, comprising 5 to 90 wt.% of at least one inorganic binding agent, 0.1 to 10 wt.% soot and 0.1 to 15 wt.% carbon fibres, based on the total weight of the composition. The invention also relates to filler, screed or floor leveling compounds containing said composition, and to the use of said composition and/or the filler, screed or floor leveling compounds obtained from said composition for producing a flat heating element, in particular for electrically heating floor, wall or ceiling surfaces.

Powered roller screed with riser wheel

Abstract: A rotating cylinder cement screeding system having a drive assembly and handle at one end for powering and controlling the screeding system. The rotating cylinder may be defined by one or more tubular screed roller sections of varying lengths, thereby allowing a user to customize the length of the system to match a specific cement pour. Further, each tubular screed roller section may be supplied with a male and female end for interlocking with each other and for receiving a variety of add-on attachments. At least one riser assembly may be interconnected to a drive assembly end and/or a non-driven end of the rotating cylinder cement screeding system. The riser assembly may elevate the rotating cylinder a distance above a finished slab to prevent the rotating cylinder from contacting the finished slab during a screeding operation.

Pavement construction method, rotating drum, asphalt finisher, and alerting pavement

Abstract: PROBLEM TO BE SOLVED: To reduce a construction cost of an alerting pavement and shortening a construction period thereof, as compared with the case of conventional techniques.SOLUTION: A lateral groove 20 is formed simultaneously with laying and leveling. An asphalt mixture is laid on by an expansion screed 8. Meanwhile, a rotating drum 11 is driven in a direction of travel while rotating according to travel of an asphalt finisher. A part of a self-weight of the asphalt finisher and the self-weight of the rotating drum 11 act on the rotating drum 11. As a result, a protrusion 15 is pressed to a surface of a laid and leveled asphalt pavement. Moreover, when the rotating drum rotates and the protrusion 15 is detached from the surface of the asphalt pavement, the lateral groove 20 corresponding to the shape of the protrusion 15 is formed. Laying and leveling, rotation of the rotating drum, pressing of the protrusion, and detachment of the protrusion are continuously repeated to form a large number of lateral grooves 20 continuously in the travel direction.

Road paver with layer thickness measurement apparatus

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 (9) of a road pavement (6) that is newly laid by the screed. The measuring device (60) determines the layer thickness (9) at an intended location (8) relative to a direction (V) of travel behind a rear edge (10) of the screed (4). The measuring device (60) is mounted on the paver (100) to enable determination of the thickness (9) of the layer independently of a geometric shape and/or a movement of the screed (4).

Road finisher has main spring joint that is provided with floating bearing and fixed bearing, and main unit that is arranged in conveyer unit to facilitate instrumentation acquisition of mass, volumetric flow and bulk material density

Abstract: The road finisher (1) has a screed (2) and a conveyor unit that are provided for transporting mixed material The main unit is arranged in the region of conveyer unit to facilitate instrumentation acquisition of mass, volumetric flow and bulk material density A main spring joint made of strip steel is provided with floating bearing and fixed bearing A wear plate and force measuring sensors (9a,9b) are formed in a weighing device (8) An independent claim is included for a method for determining mixed material volume

Monolithic roof-protective coating of operational purpose

Abstract: FIELD: construction. ^ SUBSTANCE: in a monolithic roof - a protective coating of operational purpose made as multilayer and consisting of a slope-forming screed 2, laid on a base 1 of a power floor slab, a priming layer 3, filled with quartz sand 4 during application, which serves function of a steam insulation layer, a hydraulic insulation layer 5 is made as a hydraulic insulation membrane by pouring polymer materials of higher elasticity, for instance, methyl methacrylate, types of matacryl, polyurethane and other polymers that withstand tension (elongation) in case of rupture of at least 200%. The bearing high-strength layer 6 is made of a polymer binder of similar origin, but with lower deformation characteristics and is filled with quartz sand by at least 100% of the binder's mass. In the finishing top layer 7, made as polymer, thickness, colour, chemical resistance, extent of roughness and other characteristics are determined by conditions of operations of a specific roof. At the same time all polymer layer are made in a seamless monolithic version. ^ EFFECT: increased operational reliability of the roof. ^ 6 cl, 4 dwg

Screeding machine and method for leveling floor bases

Abstract: A screeding machine for leveling floor bases comprising a frame or chassis (BB), to which means (AA) for supporting and moving the machine frame (BB) in at least two directions and means (CC) for supporting and moving a milling device (DD) are associated; the milling device (DD) has, as a terminal element, a rotary tool (EE) for leveling and smoothing a substrate screed to obtain a finished surface on which to lay the floor. In particular, the milling device (DD) includes means for controlling the elevation of the rotary tool (EE), with respect to the surface of the screed and with reference to a plane generated by a known-type laser source.

Screed heating device for paver

Abstract: The utility model relates to a screed heating device for a paver, which comprises a base board, two heating bodies, two pressing plates and a heat conducting plate. The base board is provided with a bearing face, the heat conducting plate is attached to the bearing face, the two heating bodies are of an L-shaped structure, arranged on the heat conducting plate evenly in symmetrical mode and connected end to end to form an annular structure, and the two pressing plates are pressed on the two heating bodies respectively. Due to the fact that the heat conducting plate is arranged on the base board and the L-shaped heating bodies are symmetrically arranged on the heat conducting plate, the two heating bodies form an annular structure on the base board. Therefore, two ends hard to be heated of the heating bodies are arranged in an area easy to be heated on the base board, and the heat conducting plate can deliver heat produced by the heating bodies to the base board fast. The screed heating device improves heating uniformity of the base board, shortens heating time, and is high in heat efficiency, simple in structure and convenient in installing.

Mobile applicator lid with seal arrangement

Abstract: A screed die box includes a screed die bucket, a screed die box gate, a screed die box lever, a screed plate, and a positioning member. The screed die box gas is slidably connected at the bottom of the screed die bucket. The screed die box lever is rotatably connected to the screed die bucket and the screed die box gate for sliding the screed die box gate between an open position and a closed position. The screed plate is slidably connected along an aft side of the screed die bucket and includes a positioning aperture. The positioning member is located in the screed die bucket and engages the screed plate, the positioning member sliding the screed plate as the positioning member is rotated.

Device for heating screed plate, screed apparatus using the same and road paving machine

Abstract: PROBLEM TO BE SOLVED: To provide a device for heating a screed plate, which has superior transmission efficiency of heating energy and heating uniformity without losing abrasion resistance, a screed apparatus using the same, and a road paving machine.SOLUTION: The device for heating the screed plate is used for heating a screed plate 3 of a screed apparatus 7 for laying and leveling an asphalt mixture laid on a road surface, and comprises: sheathed heaters 14a, 14b and 14c; and steel members 15a, 15b and 15c which have the sheathed heaters 14a, 14b and 14c brazed thereto respectively. The steel members 15a, 15b nd 15c are joined to the screed plate 3 with spot welding or with the intermittent welding of fillet welding.

Road paving machine with layer thickness measuring device

Abstract: PROBLEM TO BE SOLVED: To provide a road paving machine which can accurately determine a layer thickness during traveling on a pavement and which is suitable for flexibly recording the layer thickness.SOLUTION: A road paving machine 100 has: a tractor 50; a screed 4; a measuring device 60 provided for determining a layer thickness 9 of a road pavement 6 newly laid down by the screed 4. The measuring device 60 is configured to determine the layer thickness 9 at an intended position behind a rear edge part 10 of the screed 4 when viewed in a travelling direction V, and is provided in the road paving machine 100 so that the layer thickness 9 can be determined independently of a geometrical shape of the screed 4 and/or its movement.