Abstract: In one aspect, a dowel is configured to join two adjacent concrete sections. The dowel includes a cylindrical rod having a length and a reflective marker disposed on the cylindrical rod at a midpoint of the length. The dowel is attached to a basket proximate one of the ends.

Abstract: Presented herein is a connector forming a joint between first and second surfaces. The connector includes a hollow male member embedded in a first surface. The male member has open ended protrusion extending therefrom. A hollow female member to be embedded in second surface. The female member has a mating opening for receiving the protrusion and a flexible sealing means for forming a fluid tight seal between the female and male members. When installed, a tendon forms part of the first surface and extends through protrusion into female member. Prior to grouting, movement of the tendon during settling of first surface is facilitated by the male and female member, without breaking the fluid tight seal formed by flexible sealing means. Also presented is a method of forming a joint between a vertical surface and a horizontal surface.

Abstract: A cement board made to rapidly and accurately match with a base body. The base body has at least one short and tapered projection extending outward. The cement board includes a concrete slab, a reinforcing frame, and at least one fixing member. The at least one fixing member has at least one positioning hole and at least fixing hole defined thereon. The reinforcing frame is positioned into the concrete slab. The at least one positioning hole is coupled to the at least one projection, to position the cement board onto the base body. The at least one fixing member is coupled to the at least one fixing hole, to fixing the cement board onto the base body. The positioning hole is a tapered hole, a diameter of the positioning hole gradually reduces from one end adjacent to the base body to the other end.

Abstract: Connector (10) forming a joint between first (20) and second (22) surfaces. Connector (10) comprises: (i) hollow male member (18) to be embedded in first surface (20), the male member (18) having open ended protrusion (102) extending therefrom; (ii) a hollow female member (12) to be embedded in second surface (22), female member (12) having mating opening (42a) for receiving protrusion (102); and (iii) flexible sealing means (16) for forming a fluid tight seal between the female (12) and male (18) members. When installed, tendon (34) forming part of the first surface (20) extends through protrusion (102) into female member (12). Prior to grouting, movement of tendon (34) during settling of first surface (20) is facilitated by the male and female member (12, 18) without breaking the fluid tight seal formed by flexible sealing means (16). Also claimed is forming a joint between a vertical surface and a horizontal surface.

Abstract: A concrete dowel device including a sleeve and plate in which the sleeve includes break-away alignment tabs at the opening of the sleeve to ensure proper alignment of the plate within the sleeve during field installation. The tabs are positioned at the sleeve opening, rather than along the length of the socket, to avoid misalignment of the plate in the sleeve, simplify use and reduce manufacturing costs of the product. The sleeve and plate may include additional alignment surfaces on the plate, at the rear corners, or along the rear side of the plate and sleeve. To facilitate manufacturing, the break-away alignment tabs may be formed as molded components rotated and snapped into position. Alternatively, the break-away alignment tabs may be formed as part of an insert plate manufactured apart from and attached to the flange of the sleeve.

Abstract: A plural-component, composite-material highway dowel bar and an associated fabrication methodology. The dowel bar includes an elongate, solid-cylindrical, high-shear-strength core bar, preferably steel, and an elongate, fiber-reinforced plastic-resin jacket, including an elongate, pultrusion-formed, tubular sleeve, and sleeve-received, opposite-end, end-well sleeve end plugs, fully surrounding and protectively covering the core bar.

Abstract: An expansion joint system of a concrete slab arrangement, comprising an expansion joint reinforcement to be arranged between a first and a second concrete slab, the expansion joint reinforcement comprising at least one lo-cal or continuous dowel which is arranged to transfer loads perpendicular to the slab plane. The expansion joint reinforcement comprises an additional reinforcement comprising at least one clenching pin and to be arranged in the vicinity of the dowel in concrete, the additional reinforcement being arranged to adhere to the concrete above and below the dowel by means of a widening forming the clench point.

Abstract: The invention relates to an expansion joint system of a concrete slab arrangement, comprising an expansion joint reinforcement to be arranged between a first and a second concrete slab, the expansion joint reinforcement comprising at least one local or continuous dowel arranged to transfer loads which are perpendicular to the slab plane. A shear reinforcement or a location for attaching the shear reinforcement has been arranged in advance in the expansion joint reinforcement.

Abstract: A plural-component, composite-material highway dowel bar and an associated fabrication methodology. The dowel bar includes an elongate, solid-cylindrical, high-shear-strength core bar, preferably steel, and an elongate, fibre-reinforced plastic-resin jacket, including an elongate, pultrusion-formed, tubular sleeve, and sleeve-received, opposite-end, end-well sleeve end plugs, fully surrounding and protectively covering the core bar.

Abstract: An embodiment configured according to principles of the invention includes a plate defining a hexagon having a base parallel with joint between concrete slabs. Another embodiment includes a hexagon-shaped plate having a first portion and a second portion, and a form having a slot configured to closely receive the second portion.

Abstract: A dowel includes a corrosion-resistant sleeve, and a rod positioned within the sleeve. A sealant connects the corrosion-resistant sleeve and the rod. A method for constructing a dowel includes positioning a rod within a corrosion-resistant sleeve, and sealing the rod with respect to the corrosion-resistant sleeve.

Abstract: An expansion or crack joint assembly (32) utilizes a coupler (20) with or without a bottom sheet (34) to join adjacent roadway concrete slabs (86, 90) formed separately initially or continuously cast and later separated by a saw cut, which induces cracking to form a crack joint. The coupler (20) includes a casing (22), an internal component (24,25,62,65), and outer sleeve (26), and end caps (28,30). The casing (22) defines an internal chamber (40) which receives the internal component (24,25,62,65) therein. The sleeve (26) and end caps (28,30) fit over the casing (22). The casing (22) and sleeve (26) transmit loads between the concrete slabs (86,90) while the sleeve (26) and end caps (86,90) operate to reduce stress concentrations. The bottom sheet (34) inhibits water from entering the expansion or crack joint assembly (32) from below, if used, and prevents pumping.

Abstract: Methods, apparatuses and systems directed to joint restraining systems for concrete constructions. In one embodiment, the present invention is a novel method for creating joint restraints that employs a pipe dowel. As more fully described below, the present invention substantially reduces the time and labor involved in tying a series of parallel dowels into a rebar matrix. For example, the present invention eliminates the need to cut out sections of rebar. Rather, embodiments of the present invention require only a single cut in each rebar section along the line of the intended joint, rather than two cuts to remove a section of rebar. The present invention also eliminates the time and effort associated with tying dowels into the rebar matrix. In another embodiment, the present invention is a novel pipe dowel mechanism that, in addition to the advantages described above, obviates the need to apply a messy protective coating, such as grease, to a smooth dowel.

Abstract: A tubular reinforcing dowel system includes a plurality of fiber composite hollow, tubular dowel tubes comprising a first material and each including a longitudinally-extending bore. The dowel tube bores are filled with a second material, such as hydraulic cement, to form dowel members. The dowel members are mounted on a basket assembly which includes a pair of horizontal runners and multiple, longitudinally-aligned pairs of stands mounted on the runners. Each stand is connected to a respective dowel member end. A reinforcing method includes the steps of mounting multiple reinforcing dowel members on a basket assembly, placing the basket assembly on a crushed rock base of a roadway and pouring a cement slab on top of the base and encasing the dowel members underneath a transverse construction joint.

Abstract: A rectangular dowel bar sleeve is disclosed for receiving dowel bars and tie-bars that allows opening and closing of joints between adjacent cast-in-place slabs and pavements while allowing differential lateral movement of adjacent cast-in-place slabs in either direction parallel to the longitudinal axis of the joint and while preventing differential vertical movement of the slabs on either side of the joint. A form panel having an alignment ridge and spaced apart holes for attaching blockout bars to the form panel is disclosed. The blockout bars can be used to accurately create voids extending perpendicularly from the form panel and having upper and lower surfaces that are parallel to the intended upper surface of the cast-in-place slab.

Abstract: A concrete dowel slab joint system is provided for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs. It includes a sleeve assembly for receiving and maintaining the dowel bar therewithin. In this is way, the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. The sleeve assembly comprises an elongate sleeve body having an outer surface and an inner surface, and defines a hollow interior compartment, (b) at least one closed end, and (c) a sleeve member. Preferably, at least one collapsible spacer member is located within the hollow interior compartment. The spacer member is collapsible by interactive forces exerted by the dowel bar moving in a lateral and/or longitudinal path within the hollow interior compartment in response to the expansion and contraction of the concrete.

Abstract: A concrete dowel slab joint system for maintaining adjacent sections of concrete in alignment during contraction and expansion of the concrete, and for transferring shear stresses and bending moments across a joint formed between adjacent concrete slabs. It includes a sleeve assembly for receiving and maintaining the dowel bar therewithin. In this is way, the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. The sleeve assembly comprises an elongate sleeve body having an outer surface and an inner surface, and defining a hollow interior compartment, (b) at least one closed end, and (c) at least one collapsible spacer member located within the hollow interior compartment. The collapsible spacer member engages and positions the dowel bar at a lateral distance from the inner surface of the elongate sleeve body and at a longitudinal distance from the closed end.

Abstract: The invention pertains to a compensating highway joint system for interconnecting adjacent concrete highway sections having obliquely disposed end joints. The highway joint utilizes a V-shaped vertical separator plate which forms a tongue and groove relationship between adjacent highway sections and the separator plate supports a plurality of elongated slab bolts having opposite end regions embedded within the adjacent sections. A portion of the central region of the slab bolts is provided with a jacket of elastomeric material to provide a clearance from the surrounding concrete permitting the bolts to bend, and the ends of the bolts are provided with power cells which engage the concrete and are mounted on the bolts for limited axial displacement thereon and include spring structure to prevent excessive tension forces from being imposed on the slab bolts during extreme temperature changes.

Abstract: An improved dowel or tying bar and joint construction for transferring stresses across a joint between concrete slabs or structures and accommodating for shrinkage and expansion of concrete. The bar has a resilient facing attached to at least one side of the bar so that the concrete slab or structure can move in relationship to the bar in a direction substantially perpendicular to the resilient facing. The bar is arranged across the joint in a direction substantially perpendicular to the axis defined by the joint.

Abstract: A device for transferring vertical shear stress and bending moments across transverse joints in concrete pavement slabs and the like, and for simultaneously controlling the joint gap width. A dowel is formed from a continuous length of steel bar, treated to cause its outer ends to bond to concrete and its central portion treated to prevent bonding to concrete. The outer ends of each bar is formed to permit the center portion to be disposed near either the top surface or bottom surface of the slab sections and the outer ends along the neutral axis of the slab sections. The bars are used in pairs with one center portion adjacent the top surface and the other one adjacent the bottom surface. A multiplicity of such dowels is embedded in the concrete of a continuously-poured concrete slab aligned with the roadway and in a spaced relationship across the slab. The concrete is grooved before curing across the slab and over the central portions of the dowels.