Abstract: An edge protection system including a first expandable armoured joint to protect a first joint extending in a first direction, a second expandable armoured joint to protect a second joint extending in a second direction and an intersection module at an intersection of the first expandable armoured joint and the second expandable armoured joint, wherein the first expandable armoured joint has a first joint line, the second expandable armoured joint has a second joint line, and wherein the intersection module provides a perimeter joint line such that there is a continuous joint line including the first joint line, the perimeter joint line and the second joint line.

Abstract: The invention relates to a rupture element, which is located in concrete structures and the rupture element comprises a sheet material with edges that are bent at an angle so that they produce a tenon-shape. The rupture element, if necessary, is waterproof and produces slightly weakened cracks in the predefined location of concrete.

Abstract: A waterstop assembly for use as embedded components in at least a pair of adjacent concrete slabs, defining elongated first and second waterstop panels including a main body sheet to which is mounted by coextrusion or insertion to both of its opposite top and bottom ends a soft expansible flange made from hydrophilic thermoplastic material. Each hydrophilic soft flange has such an expansion capability as to provide strong radially outward pressure applied by the soft flange against the adjacent concrete slabs, thus providing watertight interconnection therebetween. A welding block is taken in sandwich between overlapping transitional end portions of the first and second waterstop panels. Integral ridge and groove connectors interconnect the welding block with the waterstop panels. Resistance wires connected at one end to an electric power source fuse the welding block and the first and second waterstop panels, wherein a watertight joint is formed therebetween.

Abstract: An earthquake-resistant building connection includes first and second structural elements lying a distance from each other, where the first element includes an outer side face that faces the second element. The first element includes at least one projecting member that projects from the outer side face of the first element into a cavity in the second element. The cavity is wider, higher and deeper than the member. The first element also includes an elastic component for absorbing forces and motions of an earthquake. The component has an outer surface that extends around the member and faces the second element, forming a fill area between the outer surface of the component and the second element and further between the member and the cavity. The fill area is filled such that forces and motions transferred between the first and second elements in the event of an earthquake are absorbed in the component.

Abstract: A polymeric matting article includes a web of extruded polymer monofilaments, the polymer monofilaments being heat welded at junctions to form a matrix of tangled monofilament; and at least one pair of interlocking formations; wherein the web is configured to be foldable onto itself and secured in a folded position by engaging the interlocking formations.

Abstract: The invention provides an aqueously-swellable water stop having an elongate body formed by shaping or extruding a composition mixture comprising water swelling fillers and/or polymers (e.g. Bentonite, super absorbent polymers, hydrophilic polymers), at least one elastomer or polymer, and preferably at least one plasticizer, the composition mixture when formed into an elongate water stop body having a Shore A hardness (durometer) of less than 35 and more preferably in the range of 5-35 (measured at 21° C.). The water stop body has at least one major face and a layer of pressure-sensitive adhesive attached to the face for bonding to a concrete substrate.

Abstract: A sleeve device for increasing shear capacity of a reinforced concrete slab includes a hollow member, stud members, and head members. The hollow member is positioned on and fastened to a bottom formwork defining the reinforced concrete slab. The hollow member creates a void in the reinforced concrete slab. The stud members are connected to opposing sides of the hollow member directly or using connectors. A first stud member is connected to an upper portion of the hollow member and oriented in a downward direction. A second stud member is connected to a lower portion of the hollow member and oriented in an upward direction. The head members are operably coupled to distal ends of the stud members and embedded in the reinforced concrete slab. The head members transfer shear forces across the sleeve device through an interaction between the head members and the concrete surrounding the stud members.

Abstract: An expansion joint system for bridging a gap that is located between spaced-apart structural members. The expansion joint system may be utilized, for example, in roadway, bridge and tunnel constructions where gaps are formed between spaced-apart, adjacent concrete sections. The expansion joint system includes flexible moment connections for connecting vehicle load bearing members to the support member. In certain embodiments, the expansion joint system includes flexible moment connections and friction springs. The expansion joint system may be utilized where it is desirable to absorb loads applied to the expansion joint systems, and to accommodate movements that occur in the vicinity of the expansion joint gap in response to temperature changes, seismic cycling and deflections caused by vehicular loads.

Abstract: The present invention relates to a leakage proof member for buildings, particularly to a compressive stress water stopper, which functions as or substitutes a water stop strip in a concrete deformation joint. The compressive stress water stopper may be pre-installed before casting concrete or installed after concrete is cast. The compressive stress water stopper has an upper plate, a fork-shaped rubber plate, a tapered rubber plate and a lower plate whose screw holes are alternately inserted by a plurality of fastening bolts A and B which are fastened by fastening nuts, respectively. The stress and the adhering property of the bicomponent polysulfide rubber securely attach the fork-shaped sheets of the fork-shaped rubber plate to the concrete surfaces at the two sides of the deformation joint and seal the screw holes and the clearances in the concrete.

Abstract: The invention relates to a shuttering element for a trench wall and to a method for producing the trench wall. To form the trench wall in the ground a first trench is produced initially, which is filled with a hardenable mass for forming a first trench wall segment. After the production of the first trench and before a hardening of an infilled mass into the first trench wall segment a shuttering element is arranged on at least one front face of the first trench. The shuttering element has a board-shaped base body comprising a first shuttering surface and a second shuttering surface, between which a receiving bead is arranged which is recessed with respect to the two shuttering surfaces. In the receiving bead a sealing tape is arranged which extends along the base body. The receiving bead is covered by a cover element, wherein a receiving space is enclosed in which the sealing tape is arranged.

Abstract: Edging strips for concrete floors employ parallel strips as lost formwork secured to removable timber formwork using a nailing bracket that has a horizontal plate section 32 and a vertical plate section 35, the horizontal plate section slides underneath one of the strips as the strips separate due to concrete contraction and supports a filler by bridging under the filler, the horizontal plate section comprises an elongate section of the horizontal plate section having lobes 33 and 34 at each end. These lobes are welded to the underside of one of the strips 11 or 12 with the other strip located on top of the elongate section. The vertical plate is a fixing plate 35 with predrilled holes for nailing to the timber form, the elongate section having tapered corners opposite each lobe and the vertical plate extending in a plane located between the lobes.

Abstract: A thermal joint having a cold side angle joint; a warm side angle joint; a plurality of bond holes, wherein a liquid curable flooring material bonds through each bond hole; a plurality of rod holes in the warm side thermal wall each holding a rod; a plurality of tube holes in the cold side thermal wall each having a tube; a plurality of leveler holes in each base for containing an adjustable leveler; a tie bar engaging each tube and each rod; a heater conduit longitudinally positioned on the warm side for transferring heat to the warm side, wherein the thermal joint simultaneously allows the rods to slide in the tubes as the cured solid flooring material expands and contracts due to temperature changes and simultaneously prevents vertical deflection as heavy equipment is transported across the cured solid flooring material.

Abstract: Novel dowel structures and related methods are provided. In one embodiment, a unitary dowel structure is formed from a plurality of laminates. In certain embodiments, a first dowel laminate may be placed substantially above or below one or more other dowel laminates. At least one laminate may include a first material that is substantially devoid in another laminate. Upon being in communication, the laminates may form a unitary dowel structure having a first end and a second end that are configured to flex in a vertical direction without breaking to transfer stress loads from a concrete slab in communication with the first end of the unitary dowel structure and a concrete slab in communication with the second end of the unitary dowel structure.

Abstract: A rebar sleeve device comprising a tubular unit with an opening at least one end thereof for receipt of a rebar dowel is described. The tubular unit is typically positioned horizontally and can be elevated by a back extension component and a front extension component secured to the base unit. The front extension component comprises an opening through which the rebar dowel is inserted. The opening of the front extension component comprises a protective covering. The protective covering prevents concrete from filling in the opening, but allows for the insertion of a rebar dowel. A connection component connects a plurality of the rebar sleeve devices together to form a single unit.

Abstract: An expansion joint bracket retains an expansion joint board in a concrete installation. The expansion joint bracket may include a base member having multiple nail holes for securing the bracket to the earth (or sand or gravel put down prior to pouring concrete there upon). First and second board support members may run perpendicular to the base and parallel to each other to hold the expansion joint board in place. Gussets, typically triangular shaped gussets, extend from the board support members to the base member. The expansion joint brackets may be disposed every 12-24 inches on the expansion joint board and concrete may be poured over the expansion joint brackets, resulting in a quick and simple concrete installation.

Abstract: A tapered load plate transfers loads across a joint between adjacent concrete floor slabs. The top and bottom surfaces may taper from approximately 4 inches wide to a narrow substantially pointed end over a length of approximately 12 inches. The tapered load plate accommodates differential shrinkage of cast-in-place concrete slabs. The tapered load plate may comprise a main plate and at least one extension. When adjacent slabs move away from each other, the narrow end of the tapered load plate moves out of the void that it created in the slab thus allowing the slabs to move relative to one another in a direction parallel to the joint. Tapered load plates may be assembled into a load-plate basket with the direction of the taper alternating from one tapered load plate to the next to account for off-center saw cuts.

Abstract: A system for transferring loads across a joint between cast-in-place slabs, more particularly at crossover point of a joint between cast-in-place slabs, includes at least one dowel plate and joint elements and includes elements or abutments for limiting the relative movements of the dowel plate towards the joint elements along three orthogonal directions.

Abstract: An improved joint edge assembly, of the type used in the construction of concrete slabs, is disclosed. The assembly comprises a longitudinal joint rail, preferably of steel, which is supported off the ground by formwork. The joint rail comprises first and second joint edge members that are connected to each other by interference-type connectors with self-release elements. A plurality of studs extends downward and outward from each of the joint edge members into the concrete slabs provide a positive mechanical connection between the slab and the joint rail. As the concrete shrinks during hardening, the self-release elements of the interference-type connectors allow the joint to freely open. The joint edge assembly thus provides a self-releasing joint between adjacent slab sections, and protects the edges of the adjacent slab sections from damage. A dowel aligner may also be integrated into the assembly, to allow proper positioning of dowels within the slab.

Abstract: According to one non-limiting embodiment of the present invention, a continuous pour concrete slip dowel is disclosed configured for use across a joint between adjacent concrete slabs. The continuous pour concrete slip dowel of the invention includes a slip sleeve configured to be positioned within a first concrete slab, and a main dowel rod having i) a first rod end portion configured to be received within the slip sleeve, ii) a second opposed rod end configured to be received within a second concrete slab which is adjacent the first slab and spaced from the first slab by a intervening joint, and iii) an intermediate coupling rod portion connecting the first rod end with the second rod end, wherein the coupling rod portion defines an offset therein whereby the coupling rod portion is configured to extend around the joint.

Abstract: Edging strips for concrete floors employ parallel strips as lost formwork secured to removable timber formwork using a nailing bracket that has a horizontal plate section 32 and a vertical plate section 35, the horizontal plate section slides underneath one of the strips as the strips separate due to concrete contraction and supports a filler by bridging under the filler, the horizontal comprises an elongate section of the plate having lobes 33 and 34 at each end. These lobes are welded to the underside of one of the strips 11 or 12 with the other strip located on top of the elongate section. The vertical plate is a fixing plate 35 with predrilled holes for nailing to the timber form, the elongate section having tapered corners opposite each lobe and the vertical plate extending in a plane located between the lobes.

Abstract: A plastic extruded member is provided which will induce cracks in concrete and provide drainage for moisture entering the cracks. The member includes a base which sets upon the subgrade surface, with a pair of legs extending upwardly from the base. Arms extend laterally outwardly from each leg. As extruded, the legs are adjacent one another, and then spread apart as the concrete cures and shrinks, thereby inducing a substantially vertical crack in the concrete above the legs. The member includes a drain channel at the lower end of the legs. The gap between the legs which is created by the shrinking cured concrete provides a path from the crack to the drain channel for draining water entering the crack.

Abstract: According to one non-limiting embodiment of the present invention, a continuous pour concrete slip dowel is disclosed configured for use across a joint between adjacent concrete slabs. The continuous pour concrete slip dowel of the invention includes a slip sleeve configured to be positioned within a first concrete slab, and a main dowel rod having i) a first rod end portion configured to be received within the slip sleeve, ii) a second opposed rod end configured to be received within a second concrete slab which is adjacent the first slab and spaced from the first slab by a intervening joint, and iii) an intermediate coupling rod portion connecting the first rod end with the second rod end, wherein the coupling rod portion defines an offset therein whereby the coupling rod portion is configured to extend around the joint.

Abstract: A metal joint for concrete slabs including means of separating the slabs and means allowing the horizontal movement of slabs relative to each other while avoiding vertical movement between the edges of the slabs, the metal joint comprising a first part incorporated in a first slab, comprising a vertical web with an upper edge and provided with a series of tenons which extend horizontally towards the exterior of the slab and a second part incorporated in a second slab comprising in its upper section a web with an upper edge and a series of mortise elements which extend towards the interior of the slab and are arranged opposite the tenons so that they can engage with each other, wherein the upper edges of the webs terminate at the top by an upper sharp edge strengthened by a cold-rolled fold so as to form a right angle on the outer side of the slab and a sharp edge with an acute angle in contact with the concrete of the slab thus forming a smooth upper surface and a sharp edge of the joint of the adjacent s

Abstract: An expansion joint system for a wall is provided herein wherein a first concrete wall component is substantially separated from a second concrete wall component via a rigid plate such that contraction of the first concrete wall component does not create significant stresses in the first or second concrete wall component so as to create cracks in the first or second concrete wall component. Moreover, a compressible material may be disposed between the rigid plate and/or the first and/or second concrete wall component such that expansion of the first concrete wall component compresses the compressible material instead of imposing significant stresses on the first or second concrete wall component so as to be likely to form cracks in the first or second concrete wall component.

Abstract: Disclosed are a concrete dowel placement devices and a method of utilizing the same. A metallic stud is driven, screwed, or otherwise attached to a form. The stud may be a unitary structure, or may be a hollow tube with conventional fastening means such as nails and screws extending through and holding the hollow tube to the form. A cover having an interior compartment substantially equal in diameter to the stud is slid ably placed thereon, and a first enclosed area is developed with a plurality of forms. Concrete is poured into the first enclosed area, and upon curing, the form and the stud are removed, leaving the cover embedded in the concrete. A metallic dowel is inserted into the cover, and a second enclosed area is developed with like configured forms. The metallic dowel extends into the second enclosed area.

Abstract: An expansion joint and seal is provided that is adapted for adherence to a wall and floor interface. The joint is operative to seal the interface such that self-leveling materials cannot flow between the wall and the floor. When adhered to the interface, a compressive member may be disposed coincidental to the wall. This compressive member allows for expansion of solidified self-leveling materials relative to the wall. In one arrangement, the joint and seal utilizes a flexible sheet member having a bottom surface that is adapted for adherence to the interface of a wall and floor. A compressible member is attached to the top surface of the flexible sheet member. The bottom surface of the flexible sheet member may also include a peel-away release member that covers an adhesive disposed on the bottom surface.

Abstract: A crack inducer controls propagation of cracks in set concrete containing reinforcing bars. The crack inducer has an elongated, rigid core that is relatively narrow in a direction that is parallel to outer surfaces of the concrete. The core has a core width in a first plane that intersects the outer surfaces of the volume, that is at least 20% of the concrete volume width so that a crack in the volume of concrete is induced to propagate from the core and along the first plane. A plurality of spaced cross-plates are connected to the core and a water-stop may be included around part of the core.

Abstract: A tapered load plate transfers loads across a joint between adjacent concrete floor slabs. The top and bottom surfaces may taper from approximately 4 inches wide to a narrow substantially pointed end over a length of approximately 12 inches. The tapered load plate accommodates differential shrinkage of cast-in-place concrete slabs. When adjacent slabs move away from each other, the narrow end of the tapered load plate moves out of the void that it created in the slab thus allowing the slabs to move relative to one another in a direction parallel to the joint. Tapered load plates may be assembled into a load-plate basket with the direction of the taper alternating from one tapered load plate to the next to account for off-center saw cuts. A tapered load plate and an end cap may be used to provide load transfer across an expansion joint.

Abstract: Galvanically protected reinforcement dowel pins and methods of producing the same. In one embodiment, the reinforcement dowel pins comprise a bar or tube, the longitudinal exposed surfaces of which are covered by a heavy gauge of a sacrificial metal, such as zinc, zinc alloy, magnesium, magnesium alloy, aluminum, or aluminum alloy. The bar or tube comprises steel, carbon steel, or other ferrous metal. The heavy gauge of sacrificial metal is applied to the ferrous metal by various processes, such as roll bonding, lock seaming, welding, die casting, flame spraying, plasma spraying, dipping, sinking, and drawing. The resulting reinforcement dowel pins resist corrosion without sacrificing structural integrity, and are reasonable in materials and manufacturing costs. These dowel pins may be installed in adjacent concrete panels using conventional methods, and therefore do not introduce additional costs in installation.

Abstract: An expansion joint and the corresponding method of setting an expansion joint between adjacent slabs of poured concrete. To form the expansion joint a filler strip is provided. To protect the filler strip, a protective cap element is provided. The protective cap element has a top surface and opposing side surfaces. The structure of the protective cap element creates a long central groove. Pin corrals extend from the side surfaces of the protective cap element. The protective cap element is placed over the filler strip so that the filler strip is disposed within the groove. The protective cap element and the filler strip are anchored by driving anchor pins through at least some of the pin corrals. Concrete is then poured against the filler strip and the protective cap element, wherein the concrete envelops the pin corrals that are not engaging anchor pins.

Abstract: A sealing element (11) for sealing fastening element holes in water-impermeable sealing layers of a structure has a cap-shaped receiving space (21) for receiving curable compound exiting from the borehole and extending between a contact area (18) provided for contacting the water-impermeable sealing layer, and a flange area (19) spaced from the latter, with the outer diameter (C) of the receiving space (21) at the contact area (18) corresponding to from two-times to six-times the inner diameter (D) of a through-opening (12) which is formed in the flange area (19) and is surrounded by springing blades (15) projecting into the through-opening (12) for a clamping engagement with the fastening element (5).

Abstract: A system and method are provided for forming expansion joints within artificial ground cover. An elongated expansion joint support is coupled with a length of expansion joint material. A lower end portion of the expansion joint support is shaped to engage a ground surface. The two structures may be coupled with one another in different positions to vary the resulting expansion joint height. The lower end portion of the expansion joint support may be shaped to have a ground engagement wall and to receive ground engagement spikes. No component parts need be removed from the system after the application of artificial ground cover adjacent thereto, thus permitting simultaneous application of ground cover on both sides of the expansion joint.

Abstract: A tapered load plate transfers loads across a joint between adjacent concrete floor slabs. The top and bottom surfaces may taper from approximately 4 inches wide to a narrow substantially pointed end over a length of approximately 12 inches. The tapered load plate accommodates differential shrinkage of cast-in-place concrete slabs. When adjacent slabs move away from each other, the narrow end of the tapered load plate moves out of the void that it created in the slab thus allowing the slabs to move relative to one another in a direction parallel to the joint. Tapered load plates may be assembled into a load-plate basket with the direction of the taper alternating from one tapered load plate to the next to account for off-center saw cuts. A tapered load plate and an end cap may be used to provide load transfer across an expansion joint.

Abstract: A metal joint for concrete slabs including means of separating the slabs and means allowing the horizontal movement of slabs relative to each other while avoiding vertical movement between the edges of the slabs, the metal joint comprising a first part incorporated in a first slab, comprising a vertical web with an upper edge and provided with a series of tenons which extend horizontally towards the exterior of the slab and a second part incorporated in a second slab comprising in its upper section a web with an upper edge and a series of mortise elements which extend towards the interior of the slab and are arranged opposite the tenons so that they can engage with each other, wherein the upper edges of the webs terminate at the top by an upper sharp edge strengthened by a cold-rolled fold so as to form a right angle on the outer side of the slab and a sharp edge with an acute angle in contact with the concrete of the slab thus forming a smooth upper surface and a sharp edge of the joint of the adjacent slabs

Abstract: An elongated joint connects adjacent concrete sections, usually slabs, and remains below the top surface of the slabs during temperature fluctuations. The joint has a grooved top surface and an opposite keyed bottom, and two mirror image spaced apart sides. The top, bottom, and sides form a generally rectangular cross section. Within the joint, upright risers, flat braces, and angled knees provide stiffness to the joint yet allow bending to withstand expansion and contraction of adjacent slabs. The joint has a generally symmetrical cross section. Upon the sides and bottom, the joint has keys that connect the joint to adjacent slabs. The joint can also serve as formwork for concrete.

Abstract: In one aspect of the present invention there is provided an expansion joint strip support module 12 comprising an expansion joint strip locating portion 24 adapted to locate an expansion joint strip 20 and one or more support means 26 and 28 integral with and arranged to support the expansion joint strip locating portion. In a further aspect of the present invention there is provided an expansion joint crack forming device comprising: an elongate base strip 14 being adapted to extend along a proposed expansion joint; and a crack forming projection 84 connected to the base strip 14 and designed to form a cavity in a concrete slab which is to be formed on top of the base strip 14, the crack forming projection 84 being positioned to promote cracking of the concrete slab along the proposed expansion joint.

Abstract: A plurality of sleeve members for receiving and maintaining a dowel bar therewithin can be provided so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. The sleeve members can comprise (a) at least one hollow interior compartment for receiving and supporting said dowel bar, and (b) at least one aperture for receiving a bracket member. The dowel bar can have a tapered configuration and a pair of end sections. The dowel bar can be located within the hollow interior compartment 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. The dowel bar can move in a lateral and/or longitudinal path within the hollow interior compartment and exerting interactive forces in response to the expansion and contraction of the concrete.

Abstract: A joint assembly for controlling fractures along a fracture axis in a monolithic pour concrete structure is provided. The concrete structure is defined by a first edge form section and a generally opposed second edge form section. The joint assembly is characterized by a suspension line extending between the first edge form section and the second edge form section, and a fracture inducing sheath suspended therefrom within the concrete structure. The sheath may define an elongate slit that exposes an internal channel that the suspension line traverses. Additionally, a method for forming a control joint in a monolithic pour concrete structure via the joint assembly is provided.

Abstract: A counter for counting elongate objects having a separating section which vibrates groups of elongate objects in order to separate such elongate objects and move them to a weighing device that determines the average weight of an elongate object in the lot to which this group belongs. Such average weight is then utilized to determine the number of elongate objects that are subsequently placed in a counting basked to be weighed. Optionally, a storage section retains groups of elongate objects and moves them to the separating section. Also optionally, the counting section, which contains the weighing device, is constructed with the capability of moving elongate objects to a delivery section.

Abstract: A joint assembly for controlling fractures along a fracture axis in a monolithic pour concrete structure is provided. The concrete structure is defined by a first edge form section and a generally opposed second edge form section. The joint assembly is characterized by a suspension line extending between the first edge form section and the second edge form section, and a fracture inducing sheath suspended therefrom within the concrete structure. The sheath may define an elongate slit that exposes an internal channel that the suspension line traverses. Additionally, a method for forming a control joint in a monolithic pour concrete structure via the joint assembly is provided.

Abstract: A device for making a connection between concrete slabs, the device having two modules derived from sheets, each module having a number of flat elements which form projections, each module further having elements in the form of a right angle, having a flat part integral with projection, and a raised part, and longitudinal members between the raised parts, and wherein the modules are assembled in such a way that the raised parts and longitudinal members of the two modules are facing each other along the two sides of a center plane, and that the projections extend on both sides of the center plane, so as to form meshing projections which pass from one side of the joint to the other.

Abstract: A sleeve assembly system, a concrete dowel slab joint system, a method 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, and a concrete slab including a plurality of concrete dowel slab joint systems are provided. The concrete dowel slab joint system comprises the sleeve assembly for receiving and maintaining the dowel bar therewithin. The sleeve assembly is designed so that the dowel bar does not transmit substantial shear stresses to the concrete during the contraction and expansion of the concrete. A pair of bracket members, located on an underlying surface, support the sleeve assembly and the dowel bar above the underlying surface.

Abstract: A foaming cement (1), cooperates with the steel member (5), forms the fender structure (111), which could solely resist the load in horizontal or vertical direction, or cooperate with the columniation (222). The whole lightweight steel (5) is embedded in the foaming cement or the floor slabs. The fender structure (111) cooperates with the roof board, the ceiling (555) and the various floor slabs (333) in forming the structural system, which is capable of preserving heat and bearing the load and beautifying the environment.

Abstract: An improved waterstop having the important added feature of a hydro expansive compound which expands when subjected to water. By expanding, the hydro expansive compound effectively blocks the passage of water that leaks into the gaps created during the shrinkage of the concrete surrounding the improved waterstop. All that is required are narrow strips of judiciously positioned hydro expansive compound at opposite ends of the improved waterstop.

Abstract: The invention disclosed relates to a precast composite header joint system and method for forming and installing the same in a concrete deck structure. According to the invention, the header is cast and cured before being positioned and secured in a recess formed in one of the concrete slabs. A viscous bonding agent is then poured into the void spaces between the header and the concrete slab recess. The bonding agent cures and forms a solid material which fills all of the space between the header and the concrete slab recess. Adjacent headers installed in opposing concrete slab recesses are coupled together by a joint to provide a continuous deck structure.

Abstract: A foaming cement (1), cooperates with the steel member (5), forms the fender structure (111), which could solely resist the load in horizontal or vertical direction, or cooperate with the columniation (222). The whole lightweight steel (5) is embedded in the foaming cement or the floor slabs. The fender structure (111) cooperates with the roof board, the ceiling (555) and the various floor slabs (333) in forming the structural system, which is capable of preserving heat and bearing the load and beautifying the environment.

Abstract: The present invention is related to a device intended to establish a connection between two adjacent slabs, preferably concrete slabs, by equipping the expansion joint between said slabs, wherein said device is constituted by an assembly of two modules derived from sheets, each of the modules comprising:

Abstract: The invention relates to the articulated imbrication of concrete slabs i(in situ) wherein joints are formed by laying i(in situ), along joint lines, a simple armored mesh device with a cut and fold pattern which has been already prepared in the workshop. Advantage is taken from the retraction phenomenon in order to achieve an alternative indentation along the joints of adjacent slabs of continuous cast concrete, susceptible of forming satisfactorily a knee—or gimbal-joint connection between the joints. The process is complemented with a concrete separator element which facilitates the formation of the crack and prevents water from reaching the platform, and which can be fixed to said device. The invention applies to concrete surface roads, highways and harbour zones of goods warehouses and enables to design and make road surfaces without bases and subbases.

Abstract: A waterstop, 10 or 11, for restricting or preventing the flow of water across the joints of foundation elements 8, such as between or along individual diaphragm wall panels or between or along individual secant wall piles. The present invention also relates to a method of installing a waterstop at or near the joints between adjacent foundation elements. The waterstop consists of one or more longitudinal strips, 1 or 2, of hydrophilic material, wherein the or each hydrophilic strip extends vertically along the interface between adjacent foundation elements, from a position at or near the top of the foundation elements, to a position at or near the base of the elements.

Abstract: A concrete construction includes a formed concrete slab having at least one control joint formed into a surface of the slab to control the location of stress cracks as the slab cures. A control joint protective strip is removably received in the control joint and has a head portion which overlays upper edges of the control joint. The control joint protective strip further includes a stem portion which is configured to engage frictionally interior side walls of the control joint when the stem portion is inserted into the control joint.