Showing papers on "Screed published in 1976"

Vibrating concrete screed

Abstract: A lightweight and portable vibrating screed is provided with an elongate open structure frame which may be made up of a plurality of interconnected frame units. A shaft is supported for rotation in spaced bearings along the frame and extends outwardly beyond the bearings at each end of the frame. Variable speed drive means is provided for rotating the shaft at a sufficient speed to cause deflection of the portions of the shaft between the bearings and the portions of the shaft extending outwardly beyond the bearings to impart uniform vibrations throughout the length of the screed.

Key-joint forming divider strip with upstanding screed adapted for use with concrete slabs

Abstract: A divider strip with an upstanding screed for use with a pouring of a pair of adjoining concrete slabs, such strip being designed to be supported by a horizontal series of laterally spaced stakes which are set below a predetermined grade level, and being adapted when in its operative position to have wet concrete poured on opposite sides thereof in order to form a pair of adjoining slabs with a key joint therebetween. A dual reentrant bend at the upper marginal portion of the strip establishes a downwardly facing locking channel for the upper ends of the stakes and also establishes an upstanding screed which extends upwardly to the grade level and is for the most part of single thickness.

Key-joint forming divider strip and screed for use with concrete slabs

Abstract: A divider strip with an upstanding screed for use in connection with the pouring of a pair of adjoining concrete slabs, such strip being designed to be supported by a horizontal series of laterally and substantially equidistantly spaced stakes which are set below a predetermined grade level, and, in addition, being adapted when in its operative position to have wet concrete poured on opposite sides thereof in order to form a pair of adjoining slabs with at least one key joint therebetween. A particular bend arrangement at the upper edge or marginal region of the divider strip establishes an upstanding, inverted U-shaped, screed section having inner and outer vertical walls which have the upper edge regions thereof cross-connected by an integral flat top wall and are spaced apart a distance of less magnitude than the thickness of the stakes to which the divider strip is applied, the outer vertical wall being provided with a laterally out-turned horizontal flange which establishes a downwardly facing seating and impact shelf or shoulder for the upper ends of the associated stakes. A spring apron depends from the distal or outer edge of the seating shelf and is inclined inwardly for frictional engagement with the adjacent portions of the upper ends of the stakes so as to maintain the main body of the strip in firm gripping relation with the upper ends of the stakes. The lower marginal portion of the spring apron is turned outwardly so that it extends downwards and outwards and establishes a cam surface whereby the divider strip may be manually and telescopically slipped over and "hung" so to speak upon the stakes in supporting relationship prior to concrete-pouring operations for slab-forming purposes.

Method and apparatus for providing a power screed board

Abstract: This invention relates generally to power screed boards or apparatus for leveling, settling and/or compacting material such as concrete. More particularly, it relates to a method and apparatus which can be easily and quickly removably secured to a length of board such as a 2×4 or the like to thereby adapt or convert the length of board to a power screed board.

Exterior corner tool

Abstract: A corner tool for applying mastic material to an external corner formed by two walls which come together at approximately 90°, said tool comprising a retainer for mastic material that defines a cavity open in two convergent and substantially perpendicular planes, including a pair of slotted screed plates that extend substantially perpendicular to each other and transverse relative to the external corner, and means for positioning the mastic retainer relative to the external corner to maintain the slotted plates in contact with the two walls forming the corner while positioning the cavity in open-spaced relationship to the walls.

Trough-like sound-and heat-insulating layer for cast screed - remaining water- repellent until screed has set

Abstract: Trough-like sound and heat-insulating layer for cast screed is water-repellent and consists of webs welded together at low temps. with hot air or an open flame, and is heat-deformable to provide tight seals at outside and inside corners and around pipes. The material used comprises a thermoplastically deformable plastics fleece produced from endless filaments in random orientation with controlled uniformity, in which the filaments are distributed densely to provide a water-repellent effect and/or which is rendered water-repellent on one side by applying heat. The webs pref. have a width of 2.5 m or more to prevent unnecessary welding together of narrow webs.

Laying Concrete Block Paving

Abstract: This description of the laying of purpose-made concrete blocks to form the surface of roads and other areas used by low-speed traffic or pedestrians, is intended to help the blocklaying team achieve a good rate of progress while maintaining a high standard of workmanship. The herringbone is identified as the most adaptable pattern, and the basic operations of paving are listed as the placing of the screed and laying course, placing the blocks, completing the edges, and vibrating the surface. The organization of paving (including the delivery of blocks and the size of the laying team) are outlined, and comments are made on edge restraint, subbase, laying course, surface course, edging and vibration.