Topic
Screed
About: Screed is a research topic. Over the lifetime, 1899 publications have been published within this topic receiving 11118 citations.
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Patent•
26 Aug 1987
TL;DR: In this article, self-leveling slurry screeds which, in addition to binder, usually cement, aggregate, usually sand, and water, also include fibers, preferably polypropylene fibers, were described.
Abstract: The invention relates to self-leveling slurry screeds which, in addition to binder, usually cement, aggregate, usually sand, and water, as well as other conventional slurry screed ingredients, also include fibers, preferably polypropylene fibers The invention also relates to dry product for use in the preparation of such self-leveling slurry screeds
12 citations
Patent•
15 Mar 2011
TL;DR: In this article, 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 paving thickness to a predetermined target value and for the optimization of the operating point of the precompaction 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 rolling rate.
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.
12 citations
Patent•
28 May 1974
TL;DR: In this paper, a highway barrier wall is constructed where a concrete receiving hopper is located forwardly of a slip form and the front wall is provided with a hinged gate pivotal between open and closed positions.
Abstract: A slip form or screed for forming elongated concrete formations, such as a highway barrier wall wherein a concrete receiving hopper is located forwardly of the slip form, and the front wall of the hopper is provided with a hinged gate pivotal between open and closed positions. The gate structure permits stationary objects to enter the hopper and slip form as to become a part of the formed concrete formation, and the gate structure includes concrete retaining means to confine the concrete when the gate is opened, and control the flow of concrete forwardly through the opening when stationary objects are received within the form.
12 citations
Patent•
08 Dec 1995
TL;DR: In this paper, a triple roller tube concrete finisher is described, which uses rotating tubes to strike-off, screed and finish concrete, and includes a box-like parallelepiped, frame supported by a plurality of rotary rollers.
Abstract: A triple roller tube concrete finisher that uses rotating tubes to strike-off, screed and finish concrete. The machine rides upon concrete forms and comprises a box-like, generally parallelepiped, frame supported by a plurality of rotary rollers. The frame houses an engine, cleaning system and a hydraulic system. The engine powers the hydraulic system that rotates the rollers. Two of the rollers provide locomotion to the machine while simultaneously screeding and finishing concrete the machine moves over. Preferably, these drive rollers are bidirectional to facilitate forward and rearward movement of the finishing machine. One of the rollers functions like a strike-off to prevent ride up. This roller rotates counter to the drive rollers to grade and displace excess unlevel concrete away from the leading edge of the machine. Preferably, the vertical height of the strike-off roller and its axis of rotation may be adjusted to vary the resulting depth of the concrete passing thereunder. A pivoting housing attaches the strike-off roller to the frame and permits the vertical displacement of the roller. The strike-off roller moves the excess concrete away from the frame, forming an intermediate zone. The drive rollers then compress and screed the intermediate zone to yield a finished slab of compacted concrete. A hydraulically displaceable leg depends from the frame and may be selectively actuated to lift the drive rollers off the forms. An operator controls the rollers and a steering system from a central location.
12 citations
Patent•
16 Nov 1989
TL;DR: In this article, an apparatus for drying layers, in particular insulating materials beneath screed floors, was described, having a blower which extracts the moist air beneath the screed and forces said moist air to a drier, and a blowtorch which forces the dry air under the scree, the two blowers being fastened in the same sound-insulated housing.
Abstract: The invention relates to an apparatus for drying layers, in particular insulating materials beneath screed floors, having a blower which extracts the moist air beneath the screed and forces said moist air to a drier, and a blower which forces the dry air under the screed, the two blowers (6, 7) being fastened in the same sound-insulated housing (1).
12 citations