Screed

About: Screed is a research topic. Over the lifetime, 1899 publications have been published within this topic receiving 11118 citations.

Edge-forming device for a screed assembly

Abstract: An edge-forming device is used with a screed assembly having lateral ends and a screed plate extending between the lateral ends, the screed plate having a generally horizontal working surface, and a generally horizontal centerline. The edge-forming device includes a frame connected with a lateral end of the screed assembly and a plate disposed below the frame. The plate has a horizontal working surface and extends outwardly beyond the screed assembly lateral end. An adjustment mechanism is connected with the frame and with the edge-forming plate and displaces the plate with respect to the frame to adjust a vertical position of the edge-forming plate with respect to the screed plate such that the plate forms a vertical step in a mat of material paved by the screed assembly proximal to an edge of the mat. The adjustment mechanism also pivots the plate to adjust the taper angle of the vertical step in the mat and also to adjust the angle of attack of the plate. The adjustment mechanism includes a bracket attached to the frame and a pair of movable supports connected with the bracket and displaceable vertically with respect to the frame. Four connective members, preferably turnbuckles, each have a first end connected with one of the supports and a second end connected with the edge-forming plate. The second ends are displaceable vertically with respect to the supports to displace to the attached portions of the plate.

Compact asphalt laying machine for sidewalks and the like

Abstract: A self-propelled paving machine has a pivotable steering assembly, a gravity-fed hopper, and is relatively small, thereby specifically adapting it to applications in which high degrees of maneuverability are required, such as for paving sidewalks, golf cartways, and the like The hopper is designed to permit loading from either side using a wheelbarrow, thus contributing to the suitability of the machine for small paving jobs, and the screed assembly is readily and conveniently adjusted to vary the thickness, width, and configuration of the deposited mat

Prefabricated composite wall panel and method and apparatus for manufacture and installation thereof

Abstract: A prefabricated composite wall panel has a desired exterior finish defined by thin finish elements of brick, stone or any other suitable material and is adapted for mounting to the wall structure of a building framework by screws or other suitable fasteners. During panel manufacture thin wall finish elements are positioned at predetermined sites within the mold and aligned by alignment members in a pattern defining grout spaces. A grout placement screed having multiple holes arranged in a desired mortar pattern is positioned on the thin finish elements and pulverulent grout is deposited through the holes of the screed and into spaces between the finish elements. After removal of the screed the pulverulent grout is compacted and a liquid uncured polymeric mixture is applied as a contiguous substrate to the back surface of the panel and serves to retain the masonry elements and grout in place and to provide a moisture and air barrier that minimizes the potential for leakage or wicking of water or air infiltration through assembled panels of a wall structure. Finished panels having empty filler element spaces at side edges thereof are fixed to a wall or wall framework of a building with straight edges in abutment and filler elements are positioned to cover joints between the panels.

Method for laying down a pavement, a screed and a road paver

Abstract: In a method for laying down a pavement consisting of paving material with a screed of a road paver, in which a compaction unit, particularly a tamper, pre-compacts the paving material at cyclical work cycles with selectable stroke and selectable frequency while the pavement having a selectable pavement thickness) is in the process of being laid down at a selectable paving speed, at least the stroke is automatically adjustable in response to paving parameters, such as at least the paving speed and/or the pavement thickness, along a characteristic curve or in a characteristic map. In the screed the compaction unit comprises an adjusting mechanism which is operable during the ongoing paving work for adjusting the stroke of the compaction unit.