Showing papers on "Screed published in 1985"

User-mounted concrete screed

Abstract: A portable screed for working concrete and which is mounted on the user. The screed includes a variable length screed plate, a vibrator for the screed plate, a frame attached to the screed plate, a body harness connected intermediate the ends of the frame, and a balancing weight positioned so that the center of gravity of the screed is essentially coextensive with the center of gravity of the operator. The body harness is adjustable along the frame, and the frame may be adjustable as required to ensure that the center of gravity of the frame is positioned coextensively with the center of gravity of the operator so that the operator is not unbalanced by the screed.

Paved road surface reproducing apparatus

Abstract: The paved road surface reproducing apparatus consists of first and second self-propelled, steerable working trucks. The first truck is equipped with: a road surface heater; a pair of gas cylinder tables mounted on both sides of the truck which can be raised or lowered by lifts; a hopper for receiving a bituminous mixture from outside; and a conveyor for transporting the mixture form the hopper to the rear part of the truck. The second truck is equipped with: a hopper for receiving the bituminous mixture transferred from the first truck; a conveyor for transporting the mixture received from the hopper to the rear part of the truck; a powdery oil-absorber scattering device to minimize rutting; a small size road surface heater; a scarifier; a softening agent scattering device; and a rotor; and also equipped with a first screw spreader; a first screed; a second screw spreader; and a second screed in tandem at the rear part of the truck. The first screw spreader and the first screed are mounted on the truck to have its lower end faces to be submergible under the surface of the road.

Device for controlling the pressure upon the ground of a screed unit of vibrating finishing machine for road paving

Abstract: A device for controlling the pressure of the extensible screed of a road paver on the material to be laid down, comprising hydraulic actuators capable of lifting the screed unit and structure for regulating the pressure of the hydraulic fluid without varying the vertical position of said screed, including distributors, non-return valves, maximum pressure valves and, at least one accumulating chamber, wherein an electric circuit for transmitting signals acts upon the hydraulic circuit to adjust the pressure of the fluid in the actuators.

Screed for plastering

Abstract: The subject of the invention is a screed for plastering for the frames of windows, doors and gates, an L-shaped angle strip 1 being provided, the shorter leg 3 of which bears on the wooden frame 7 when in use and the longer leg of which can be fastened on the masonry structure 11. At the end of the shorter leg 3, a groove 4 for receiving a seal 6 or 5 is provided and, for receiving the adhesive material 10 applied between the masonry structure 11 and the longer leg 8, holes 9 are present in said leg 8. During machining, a filling line 6 is introduced into the groove 4 and, after completion, a rubber seal 5 provided with two tabs is introduced, one of these tabs bearing on the frame 7 and the other on the surface of the plastering mortar 2.

Device for testing the firmness of screed floors

Abstract: A vertically arranged bearing bolt (16) is mounted rotatably in a frame (11). Attached to the free end of the bearing bolt (16) is a pivotal arm (19; 32), which bears a scratching element (21; 34) at its free end. The scratching element (21; 34) is loaded by means of a weight (23), so that it penetrates by a certain amount into the surface of the screed when the bearing bolt (16) rotates over a predetermined distance on a path in the form of an arc of a circle. The depth of penetration of the scratching element (21; 34) is measured by means of a measuring instrument (26) attached to the frame (11) and represents a measure of the firmness of the respective screed.

Plastering-screed hook

Abstract: The invention relates to a plastering-screed hook and is characterised by its configuration as a T-shaped element comprising a pin-shaped first section, tapering at one end, and a second section provided at the other end of this first section The second section is located with its longitudinal extent perpendicular to the longitudinal extent of the first section and, between its two ends, it merges into the first section

For screed rail equipped rails of concrete for pouring in a concrete floor structure when building houses

Abstract: For screed rail equipped rails (5) of concrete for pouring in a concrete floor structure when building houses. The rail (5) is prefabricated of extremely strong concrete and stiffened with a reinforced element (8) that overhangs the outside of the rail and forms an anchor element for anchoring the rail in the floor structure. The rail has transverse holes (11) designed in part for going through the reinforcements in the upper edge, partly for wires (13) such as for anchoring the rail. The rail is equipped with a height adjustment device (9, 10) for adjustment of the rail's height position.

Underwater screed device

Abstract: PURPOSE:To enhance the efficiency of operations by concurrently performing the charging and levelling works of rubble by a method in which the charging hopper of an underwater bottom screed device is horizontally moved by a fixed distance while being kept at a fixed level. CONSTITUTION:An underwater screed device consits of an anchor 2, a working ship 1, a rubble hopper 4, a belt conveyer 5, a tripper 6, a traveling truck 8, an expandible ladder 9, and a charging hopper 15. When moving the truck 8, since the hopper 15 is horizontally moved by the distance of L while being kept at the height of H, a rubble layer C3 is formed with a given width of as much as moved distance L, and at the same time leveing work is concurrently made. When the ladder 9 is inclined, an oil-pressure cylinder 16 is reciprocally operated, and the hopper 15 is moved and held at vertical position. The mooring winch 18 of the ship 1 is operated to move the ship 1 by the distance of L, and the same operations are repeated thereafter.

Shear reinforcement for structural parts, in particular for screeds, concrete floors and concrete surfaces

Abstract: A shear reinforcement for, in particular, screeds and the like comprises a round bar (1) which is encompassed by a separating layer (2), subdivided a number of times, and embedded in the screed (3) by means of spacers (4). The shear reinforcement effectively prevents the screed from bulging out at the expansion joints.

Method of restoring hard tennis courts and courts restored according to this method.

Abstract: The restoration consists in laying a layer of concrete 5 having slopes 6, 7 inclined in opposite directions over the original materials of the court, in then laying a layer of insulation 11 over the concrete and finally an asphalt floating floor screed 12 over the insulation layer 11 The rainwater can run off down the slopes 6, 7 from the middle part 8 of the court