Abstract: Methods for the construction and repair of concrete pavements. The methods comprise forming, along each joint between adjacent slabs, parallel to the vertical plane thereof, a plurality of surface recesses (23, 43) in adjacent slabs (41, 21), alternately on either side of the joint (11), the maximum height of the recesses being smaller than the thickness of the pavement, and a plurality of holes (27, 27?; 47, 47?) at the edges of adjacent slabs (21, 41) with, at least, one part shared with said surface recesses (23, 43), and filling said plurality of surface recesses (23, 43) and said plurality of holes (27, 27?; 47, 47?) with concrete so as to form a plurality of connectors (22, 42) in the form of teeth (25, 45) for transferring loads between adjacent slabs (21, 41) and columns (29, 29?; 49, 49?)for supporting said teeth (25, 45).

Abstract: A junction between successive flat pre-fabricated elements which comprises an elastic transverse insert (9), an approaching mechanism (10) in the form of tie beams (23) and tensioning mechanisms (19). The flat pre-fabricated elements (2) to be assembled each have a transverse channel (3) adapted so as to receive the insert along the end transverse edges (4, 5) thereof, which must face each other after assembly on the ground, and conduits (7) of the tie beams. Each pre-fabricated element is successively arranged, one after the other, and the transverse insert is introduced into the transverse housing (6) formed by transverse channels facing each other. The tie beams are introduced into the conduits, the ends thereof projecting outside the pre-fabricated elements. The tie beams are then tensioned by a tensioning mechanism, at each of the ends thereof, in order to immobilize the flat pre-fabricated elements and thereby connected by the tie beams.

Abstract: A pre-fabricated concrete slab system and method have matching rectangular male and female type slabs which fit adjacent to each other in a checkerboard fashion. The male slabs include spaced reinforcing rods extending longitudinally and transversely through the male slabs with the rods' distal ends protruding outwardly away from one or more side edges of the male slabs to form a plurality of male connectors. The female slabs include a plurality of corresponding female sockets on one or more sides of the female slab, each female socket receiving a corresponding male connector when dropped therein. Corresponding female sockets positioned on opposite side edges of the female slabs are interconnected by steel reinforcing bars in both the longitudinal and transverse directions in a configuration similar to the male slabs so that, when connected, a continuous tension reinforcement is established between male and female slabs in both the longitudinal and transverse directions.

Abstract: A pre-fabricated pavement slab having a binder distribution system and an interconnection system formed for attachment of the bottom surface of the slab, wherein both the binder distribution system and the interconnection system are accessible from the top surface of the slab, such that the binder material may be injected into the binder distribution and interconnection systems from the top surface of the slab.

Abstract: A paving stone (1) has a linkage securing against displacement. This is achieved by overengaging interlocking elements (6) and underengaging interlocking elements (5) being respectively provided on each side (3, 4) of the paving stone (1).

Abstract: Deckings include an upward hook and a receptacle. The upward hook is inserted into the receptacle. The receptacle has an opening immediately below a sidewall upper end portion that is continuous with the upper surface of the decking. The space between the deckings is restrained by engaging a tip of the upward hook behind the sidewall upper end. A fixture is mounted on the connection of the deckings. A base plate of the fixture extends from the portion of the deckings below the upward hook to the portion of the deckings below the receptacle. The base plate is fixed to the decking by a male screw, whereby downward movement of the upward hook is restricted.

Abstract: A control joint for forming and controlling concrete structures such as floors and tilt-up walls. The joint has a base and an upstanding web with an off-set section and is preferably extruded from plastic. In alternate embodiments, the joint has a base and a web with a removable top cap for forming a chamber or recess in the completed product. A reusable, reinforced form for structures such as stem walls is also disclosed which form can be cut at spaced-apart locations to the desired length.

Abstract: A formwork comprising a metal panel 11 having an upper portion 12, a lower portion 13 and a intermediate portion 14 displaced laterally out of the line of the panel 11, the portions 12 and 13 have spaced holes 15 through which reinforcing rods 16 project so that the ends of the reinforcing rods can be tied to similar rods in an adjacent slab to be poured in order to occupy the space at 17. A slab poured upon a timber deck 18 and the metal form provided by the panel 11 is retained in place by upright bracing rods 19 located at spaced intervals along the form 11 and passing through pairs of holes 20 and 21 in the intermediate section 14.

Abstract: Joint forms for use in concrete slab formation. Such joint forms may be locked vertically and, if desired, laterally onto joint forms stakes by virtue of a number of aligned stake ear slots 26 and locking slots 28 which cooperate with corresponding ears and locking tabs on the stakes. The joint forms may include a number of stake retention slots aligned with the stake ear slots and locking slots, so that the stakes may be passed through portions of the joint forms in order to lock the forms laterally to the stakes as well as vertically so as not to separate from the stakes during concrete pouring.

Abstract: A concrete keyed joint is formed using a joint plate which has coplanar top and bottom sections interconnected to a parallel rearwardly spaced central section by rearwardly convergent upper and lower inclined sections and spaced pair of holes in the inclined section. Pegs or stakes support the joint plate vertically and are locked by wedges which allow vertical adjustment of the joint plate and then lock it in position. A resilient filler strip is fitted to the top of the plate to accommodate thermal expansion and contraction of the concrete slabs separated by the joint plate.

Abstract: This invention discloses an adjustable support securable to metal decking to support a metal keyway form. The adjustable support can be used to establish keyway in concrete poured above ground level, particularly on metal decking. This method of producing a keyway in concrete on metal decking is a vast improvement over previous art and provides a secure, easy, inexpensive method of producing the keyway.

Abstract: There is provided a sealing profile formed of rubber or rubber-like material for tunnel segments having a recess therefor extending therearound, the profile having a base side facing the segment and a back side facing away from the segment, a plurality of longitudinally extending parallel flutes in the base side, lateral flanks extending angularly from the base side, a plurality of longitudinally extending parallel ducts, and at least one centrally disposed bridge through extending from the base side to the back side without impairment in its supporting effort by a longitudinal duct.

Abstract: A system of forms for facilitating the pouring of concrete into slabs, including a single "universal" screed stake with four vertically spaced pairs of fingers for selective use with screeds of four different vertical dimensions, each of the pairs of fingers receiving the lower edge of one of the screeds with the top of the stakes being received in a downwardly opening pocket formed by a hem on the upper edge of the screed. A novel stake configuration including the shape and location of the fingers and the curvature of the stake at the upper end thereof is dislcosed as is a novel screed construction including the pocket formed at the upper edge thereof and the skirt at the bottom edge thereof. Together, the screed and stakes cooperate to retain the screed on the stakes.

Abstract: A partially separable attachment device for sheet metal screed and stake assemblies of the type used in forming concrete ground slabs serves to hold top portions of the sheet metal screed and its supporting screed stakes in interassembled relation for use in the screed-forming of concrete slabs of large area in smaller slab sections. The attachment device has a head portion projecting upwardly of the assemblage which serves as the screeding upper edge. This head portion is torn away after setting of the adjacent slab sections to provide recesses for the placement of caulking material protecting against the entrance of moisture.

Abstract: A key joint forming strip and supporting stake therefor wherein the upper portion of the strip includes a hook segment engageable with a supporting ledge on the upper end of the stake and the intermediate portion of the stake includes a downwardly facing hook engageable with a protrusion on a lower portion of the strip. In use, the hook segment is first engaged with the ledge and then the lower portion of the strip is forced against the stake to engage the protrusion beneath the downwardly facing hook. Once so engaged, the strip is held in place between the ledge and the hook.

Abstract: A metal concrete joint form is shown supported on a plurality of interlocking metal stakes for providing a positive, vertically-adjustable, strong locking action between these members. The top end of each stake is flattened and it has a plurality of closely-spaced vertically arranged serrations or ratchet formed on one side thereof. The concrete joint form is an elongated sheet metal member having an inverted hook portion at the top edge of the form with a downturned flange that has its lower edge hemmed on the inside and then folded outwardly to create an upwardly-inclined raw edge of the hem of the flange to serve as a locking pawl for cooperating with the vertical row of serrations or ratchet.

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.

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.

Abstract: A distribution block, which comprises a body having a trapezoidal longitudinal section and toothing bars projecting on the said body and extending from an inclined face to the upper face thereof.