Abstract: The invention relates to a seal arrangement consisting of two abutting structures of concrete, steel, reinforced concrete, cast iron or other materials and a sealing section of elastomeric material which bridges and seals the gap between the two structures, in which the structures are especially segments assembled to form a tubular tunnel with the formation of transverse and longitudinal seams, where each segment preferably has at least one peripheral recess covering all the mating sides of the segments and there is in each recess a stranded sealing section which especially has strand-shaped grooves on the base side of the sealing section and/or strand-shaped channels, forming a sealing frame with corners, and the back of the sealing section has at least one strand-shaped groove to accept an emergency seal.

Abstract: A pavement repair structure and method of repair for forming a bond between vertical surfaces in asphalt pavement. The repair structure comprises a flexible, internal layer that is impregnated with an adhesive asphalt medium to define an elongated strip. An additive agent is incorporated in the asphalt medium to reduce the tackiness and lower the temperature sensitivity of the asphalt medium. A cut in the asphalt pavement caused by either a saw or a jack hammer is sealed by using the repair structure to form an extremely strong bond between the vertical cut edge of the pavement and the patch of new asphaltic concrete mix. The repair structure is also able to form a bond which is waterproof and will resist cracking due to extreme temperatures as a result of severe climatic conditions, the thermal expansion and contraction which the pavement will experience, and deflection of the pavement under traffic loading.

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: A process for paving a surface of a sub-base with compactable asphaltic concrete comprising aggregates and an asphaltic cement to provide a finished asphaltic pavement having dormant zones of potential fracture at predetermined locations. The process comprises the steps of forming a continuous mat of compactable asphaltic paving concrete having a predetermined thickness on the surface of a sub-base; creating dormant zones of potential fracture at predetermined locations in the mat prior to compacting the compactable asphaltic paving concrete; and compacting the mat of compactable asphalt concrete to seal the dormant zones and provide a finished asphaltic pavement of predetermined density having a smooth traffic bearing top surface with the sealed dormant zones of potential fracture substantially concealed therein.

Abstract: In the construction of a concrete surface formed by a plurality of slabs, sleeves are inserted into a slab while the concrete is still plastic. The slab is allowed to harden. Dowel bars are then inserted into the sleeves to provide load distribution among the slabs. Advantageously, the dowel bars are inserted into a slab only when construction of adjacent slabs is ready to proceed.

Abstract: The present invention is directed to an improved bridge joint and method for constructing a bridge joint in a channel or trench over an expansion gap in a bridge. The invention utilizes a polysulfide elastomer binder, which may be provided at room temperature and poured over aggregate chips in the channel, even in adverse weather conditions. The resulting mixture of polysulfide elastomer binder and aggregate withstands vehicular impact stress and provides adhesion and improved elasticity.

Abstract: A corner area has a corner piece which is inserted between two ends of the sealing profile strip of a sealing structure and is joined thereto. To facilitate the deformability of the corner piece when the sealing structure is pressed together under pressure, the structure has recesses. These recesses are disposed at an angle to cavities in the ends.

Abstract: The present invention is directed to an improved bridge joint and method for constructing a bridge joint in a channel or trench over an expansion gap in a bridge. The invention utilizes a Batron elastomer binder, which may be provided at room temperature and poured over aggregate chips in the channel, even in adverse weather conditions. The resulting mixture of Batron elastomer binder and aggregate withstands vehicular impact stress and provides adhesion and improved elasticity.

Abstract: A process for paving a surface of a sub-base with compactable asphaltic concrete comprising aggregates and an asphaltic cement to provide a finished asphaltic pavement having dormant zones of potential fracture at predetermined locations. The process comprises the steps of forming a continuous mat of compactable asphaltic paving concrete having a predetermined thickness on the surface of a sub-base; creating dormant zones of potential fracture at predetermined locations in the mat prior to compacting the compactable asphaltic paving concrete; and compacting the mat of compactable asphalt concrete to seal the dormant zones and provide a finished asphaltic pavement of predetermined density having a smooth traffic bearing top surface with the sealed dormant zones of potential fracture substantially concealed therein.The invention also includes the finished asphaltic pavement produced by the process of forming a mat of compactable asphaltic paving concrete on the sub-base surface.

Abstract: The invention relates to a constructional element such as a tunnel lining, part of which is shown in the drawing, comprising adjacent segments which have facing surfaces between which there is a joint which is physically deformable under load. The joint comprises a toroidal body or tube of substantially circular cross section received in complementary or semi-circular facing recesses in the surfaces respectively, and comprises a flexible material such as polypropylene and which means in the form of a nozzle for gaining access to the interior of the body. The body is initially filled with a fluid, which could be a liquid or gas, through the nozzle, which can then be maintained in the body by closing the nozzle as by a valve.

Abstract: A shaped, water-expandable water-sealing article used for sealing an area between a first section of at least partially cured concrete and a second, adjacent section of substantially uncured concrete. The clay water sealing article is in the shape of a quadrilateral, preferably a trapezoid, and is disposed to bridge an area between the two sections of concrete. Upon hydration of the clay contained within the shaped water sealing article, expansion of the clay creates expansion forces extending from a corner of the article that is surrounded by the uncured concrete, wherein the corner has an included angle greater than 90.degree., preferably at least 100.degree.. The expansion force developed by the expansion of the shaped water sealing article are absorbed by a substantially increased area of the uncured concrete as compared to expansion forces resulting from a clay-based water seal having a 90.degree. included angle at the corner(s) surrounded by the uncured concrete.

Abstract: A paving machine having a medially located dowel bar feeder positioned in front of a dowel bar inserter. The machine has a screw or paddle for spreading the concrete and a front strike-off to allocate a proper amount of unconsolidated concrete beneath the machine. Next in line, internal vibrators are mounted to the machine to perform a preliminary consolidation of the concrete, followed by a screed to meter out a correct volume of consolidated concrete for a finished concrete slab. To the rear of the screed, the dowel bar feeder drops dowel bars in a predetermined pattern on the top surface of the consolidated concrete. The dowel bar inserted is mounted to the paving machine behind the dowel bar feeder and includes a plurality of vibrating forks which descend to engage the dropped dowel bars and insert the dowels into the unhardened concrete. In operation, the dowel bars are dropped and the paving machine is driven forward until the forks are over the dropped dowel bars.

Abstract: Disclosed is an extruded, low density, non-outgassing ethylenic polymer foam containing 30-85% open cells and the remainder closed cells and having an essentially integral surface. The foam possesses superior compression recovery and lower compression resistance when compared with similarly comprised ethylenic closed cell foams and superior moisture resistance and handling characteristics when compared to open cell foams.

Abstract: A collapsible spacer for disposition between a form for a concrete foundation member and the underlying soil includes voids to allow the spacer to deform permanently and occupy a reduced volume when upheaving of the soil occurs. The spacer is fabricated from a material, such as expanded polystyrene foam, whose structural strength is not significantly altered by exposure to moisture. Embodiments of the spacer which are suited for use with forms for foundation beams and slabs are discussed.

Abstract: An expansion joint retainer is used in fastening a flexible elastomeric seal or strip seal to a structural slab. The retainer has a main body made from a first material. The main body has a thickness selected to permit emplacement of the retainer on the edge of a slab whereby the upper surface of the main body is substantially coplanar with or beneath the upper traffic bearing surface of the slab. The retainer includes a retaining element adjacent the lower surface of the main body. The retaining element is made of a second material serving to provide the retainer with sufficient rigidity to be bolted to a slab. The invention is characterized in that the second material is a thermoplastic elastomer.

Abstract: A paving machine having a medially located dowel bar feeder positioned in front of a dowel bar inserter. The machine has a screw or paddle for spreading the concrete and a front strike-off to allocate a proper amount of unconsolidated concrete beneath the machine. Next in line, internal vibrators are mounted to the machine to perform a preliminary consolidation of the concrete, followed by a screed to meter out a correct volume of consolidated concrete for a finished concrete slab. To the rear of the screed, the dowel bar feeder drops dowel bars in a predetermined pattern on the top surface of the consolidated concrete. The dowel bar inserter is mounted to the paving machine behind the dowel bar feeder and is adapted to travel between a forward position and a rear position and includes a plurality of vibrating forks which descend to engage the dropped dowel bars and insert the dowels into the unhardened concrete.

Abstract: Disclosed is an extruded, low density, non-outgassing ethylenic polymer foam containing 30-85% open cells and the remainder closed cells and having an essentially integral surface. The foam possesses superior compression recovery and lower compression resistance when compared with similarly comprised ethylenic closed cell foams and superior moisture resistance and handling characteristics when compared to open cell foams.

Abstract: A paving composition comprises a cement binder, a dispersible latex polymer binder, and a mineral aggregate filler such as sand. The filler may be made up of mineral fines such as fly ash, mineral aggregate such as sand, and/or an elastomeric filler such as ground rubber particles. The composition may further include a defoamer, a plasticizer and a dispersible pigment, the latter preferably being a black pigment to color the composition to that of asphalt pavement.

Abstract: A method to produce an expansion joint for adjacent roadway slabs having a gap therebetween. A recess is cut or formed into the surface of each adjacent roadway slab to form a pair of recesses parallel to and adjacent to the gap. The recesses are cleaned to a sound, dust-free and rust-free surface. Each recess is coated with a slightly resilient polymer primer to inhibit rusting and corrosion and to form a bonding surface. A mortar mixture of a slightly resilient polymer and aggregate is installed in each recess to form a pair of parallel nosings adjacent to the gap, the nosings being bonded to the roadway slabs. Opposed surfaces of the nosings are primed with a silicone primer. A temporary backing is inserted in the gap between the nosings. An initially liquid silicone sealant is installed between the nosings and on top of the temporary backing which will cure to form a flexible seal.

Abstract: Disclosed is an extruded, low density, non-outgassing ehtylenic polymer foam containing 30-85% open cells and the remainder closed cells and having an essentially integral surface. The foam posseses superior compression recovery and lower compression resistance when compared with similarly comprised ehtylenic closed cell foams and superior moisture resistance and handling characteristics when compared to open cell foams.

Abstract: A concrete joint in concrete slab structures in which the joint includes an insert that is retained in centered position in a slot or recess formed in the upper surface of a concrete slab generally in alignment with a crack or fracture line extending downwardly from the slot or recess formed in the concrete slab. The bottom of the slot or recess is provided with a seal of cementitious material which extends completely across the bottom of the slot or recess and fills the crack or fracture line with the lower edge of the insert being inserted partially into the cementitious seal which is in the form of a quick setting sand and cement mixture which has high compression strength and low tensile strength and which will adhere to concrete surfaces but will not adhere to the insert. The space above the bottom seal on each side of the insert is then filled with a filler of an epoxy or similar material which encapsulates the spring clips and fills the slot or recess on both sides of the insert.

Abstract: An expansion joint for use in constructing concrete material structures of the present invention has a plurality of sandwich type composite plates each comprising a sheet-like elastic body sandwiched by a pair of hard plates with a rib at both surfaces thereof are connected with each other through a water-swelling rubber.

Abstract: A method for constructing a bridge joint in a channel overlying an expansion joint involves lining the channel with a thermoplastic asphaltic elastomeric binder followed by successive applications of layers of aggregate and binder mixture wherein the thickness of each layer is restricted to about the maximum dimension of the aggregate in the layer. Care is taken to insure that both the binder and the aggregate are hot when the layered joint is formed to insure good bonding between layers and with the roadway material. The aggregate of each layer is raked to project upwardly from the mass of the layer before a subsequent layer is applied to enhance the interlock between layers. A final layer containing smaller aggregate is applied at the joint top and the joint is then sealed and rolled to form an integrated, resilient load bearing structure.

Abstract: Joints between surfaces are sealed by a method which cleans the joint surfaces, installs a backer rod between the joint surfaces, applies a sealant in the space over the backer rod and allows the sealant to cure. The backer rod is an open cell foam having an impervious skin. Preferably, when the surfaces are horizontal, as in a highway, the sealant used is a self-leveling sealant, preferably a silicone sealant.

Abstract: This invention relates to a pre-cast concrete traffic barrier element and a method of constructing a traffic barrier using the element on a vertical face of a retaining wall. The barrier element is a profiled reinforced block of concrete having a bottom surface with a longitudinally extending channel therein. The traffic barrier element is supported on the retaining wall with a top surface of the retaining wall being received within the channel. U-shaped anchoring bars project from an interior portion of the traffic barrier element and from the top surface of the retaining wall to form an oval keyway the length of the longitudinal channel. A locking bar arrangement is inserted through the keyway in a locking relationship with the U-shaped anchoring bars. Sealing material between the traffic barrier element and the retaining wall and between the traffic barrier element and the ground adjacent to the retaining wall on the traffic side prevents the leakage of grout and leveling of the barrier element.

Abstract: An expansion joint filler strip holder and an associated method are disclosed. The device consists of a ground engaging member to which a filler strip holder is attached. In one embodiment, the filler strip holder consists of two parallel rails to which are attached a plurality of material supports. In another embodiment the rails are formed to provide a plurality of material support portions. The method involves providing the device and placing it in the ground by using the ground engaging members and then placing filler paper between the rails and material supports or portions. After this, concrete is poured over the device and around the filler paper to form an expansion gap between adjacent concrete areas.

Abstract: A sealed joint in a concrete highway or the like is installed in a channel formed above the usual shrinkage control cut or construction joint between adjoining concrete slabs by placing in such channel a preformed and relaxed length of a ductile and elastic material and bonding it to at least part of the concrete faces of the channel by a ductile and elastic adhesive. In some instances, an anti-bonding agent is applied to portions of the preformed and relaxed length to provide for joint expansion and retraction. The joint installation channel is preferably unusually shallow and may be dry cut. Its width is sufficiently narrow that traffic loads are carried by the concrete bordering the channel. The preformed length is preferably of strip formation, which is introduced into the channel from a stable roll of same.

Abstract: A system for protecting and draining expansion joints joining juxtaposed discrete sections of construction materials is disclosed in which a pair of laterally disposed sheet members having free ends rebent into moveably interlocked curves, and secured ends fixed to the construction material sections cooperate to form a liquid collector between the sections of construction materials such that compensation for changes in the width of the gap is accomplished by relative movement of the interlocked curves. A cover member spans the joint above the sheet members.

Abstract: A removable concrete expansion joint aligner and brace having an elongated base plate with a parallel row of ground pegs attached to the bottom and with a parallel set of aligning pegs mounted on the bottom in a position slightly removed from the parallel line of ground pegs so that an expansion joint may be held in position between the ground pegs and aligning pegs while fresh concrete is poured against at least one side of the expansion joint held in place by the expansion joint aligner.

Abstract: A joint seal comprises two elastomeric elements, configured to fit as a nested assembly within the gap between adjacent slabs. The outer element (the "outer seal") is a generally U-shaped channel (with sides and a bottom), and performs the actual sealing function. The outer surfaces of the channel sides are formed with a series of longitudinally-extending fins, which frictionally engage the slab edges. The inner element ("the core") is formed as a generally rectangular tube that provides a structural strength for the seal assembly. It includes a tubular outer wall and an internal truss-type framework consisting of a number of interconnected webs. The seal assembly is installed under compression.

Abstract: A sealed joint in a concrete highway or the like is installed in a channel formed above the usual shrinkage control cut between adjoining concrete slabs by depositing a mass of uncured ductile and elastic adhesive, preferably a special silicone material, in such channel and embedding a preformed length of a cured ductile and elastic material, again preferably a special silicone material, in such adhesive. The length is preferably of strip formation and has intermediate areas of its upper and lower surfaces covered with respective fillers of an anti-bonding agent to provide for joint expansion and retraction. The joint installation channel is preferably unusually shallow and may be dry cut. Its width is sufficiently narrow that traffic loads are carried by the concrete bordering the channel. Preformed strip is introduced into the adhesive in the channel from a stable roll of same.

Abstract: A collapsible concrete bulkhead is insertable into a framework. The bulkhead has a pivotable divider plate which is located juxtaposition to a bulkhead plate and moves laterally thereof to reside in an offset base portion of the framework. The bulkhead assembly forms separate concrete sections when concrete is poured into the framework and forms a gap when the bulkhead assembly is removed. Optionally, a liner can be inserted adjacent to the bulkhead assembly and the bulkhead assembly removed before full cure of the concrete so that the concrete fills the void left by the bulkhead with the liner separating the concrete sections.

Abstract: Each of the recessed, confronting edges of adjacent concrete slabs in a roadway or the like has secured therein by a high density reinforced grout an elongated, rigid, prefabricated or precast edger strip, which also has an elongate recess in the edge thereof which faces on the space between the slabs. An elongate, semi-rigid, prefabricated cover member, which is generally T-shaped in cross section, has its upper, plate-shaped section positioned over the upper end of the space between the slabs so that opposite sides thereof project part way into the recesses in the edger strips, and has its downwardly projecting web section embedded in a sealing compound positioned between the confronting ends of the slabs. Remaining portions of the recesses in said edger strips are filled with a low modulus urethane compound.

Abstract: A machine to insert strips in expansion joints and concrete surfaces has features to prevent placing the strip in the joint while stretched. The machine includes the frame mounted on wheels. A supply reel mounted to the frame has a quantity of the strip wound about it. An insertion disk is rotatably mounted to the frame and positioned in the groove to push the strip into the groove. A pair of driven pinch rollers pull the strip from the roller. The drive mechanism for the rollers rotates the rollers at a speed selected to eliminate any tension in the strip between the insertion disk and pinch rollers.

Abstract: An expansion joint is shown for use in joining adjacent concrete sections separated by an expansion slot such as in a roadway having concrete sections and a slot therebetween. The joint includes a preformed longitudinal sealing element which is formed of a resilient material and installed within the slot. An initially flowable adhesive material is applied between the sealing element and opposing side surfaces of the concrete sections making up the joint. The moduli of elasticity of the adhesive material and sealing element are selected so that forces exerted upon the joint by expansion and contraction of the concrete sections result in movement of the central sealing element, rather than exerting strain upon the adhesive bond.

Abstract: An improved roadway and roadway expansion joint is provided, wherein at least some of the adjacent slabs, comprising the roadway, are parallelogram-in-shape and have complementary angles adjacent abutting ends.

Abstract: A membrane for the repair of road surfaces, particularly for the retardation of reflective cracking from an old road surface to a newly-applied overlay. The membrane comprises a glass fiber mat impregnated with a blend of asphalt, a block copolymer and a mineral filler. The membrane, in the form of a complete covering or relatively small patches applied directly over a crack, is thermally adhered to the old road and to the overlay by the heat of the overlay itself. The membrane has a low modulus of elasticity, particularly at below freezing temperatures, to minimize crack-propagating stresses and to distribute both thermal and traffic stresses over a broader area of both the old road surface and the overlay.

Abstract: An improved continuous pavement process for a bridge surface comprises the steps of arraying a plurality of bridging metals in a hollow space provided between adjacent floor slabs of a bridge. Each of the plurality of bridging metals comprises a generally U-shaped member, which extends in the direction of a longitudinal bridge axis with its tip end opened and includes pieces being bent 180.degree. and extending outside from the upper edges of the base portions of the respective side pieces thereof so as to form an inverse U-shaped cross-section jointly with the corresponding side piece, in such manner that a side piece of the generally U-shaped member of one of adjacent bridging metals may loosely and movably fit in the inverse U-shaped cross-section of the other bridging metal.

Abstract: An expansion joint for sealing the channel between two sections of roadway has a plug and a fluid-polymer poured into the joint and allowed to set in situ in the channel. Enclosed within the fluid is a core of a mastic material which is more plastic and less elastic than the fluid-polymer. The elasticity of the fluid-polymer allows the joint to accommodate changes in the size of the joint due to e.g. thermal expansion and contraction. Plastic flow of the core permits changes of shape of the joint to be absorbed without causing excessive stressing of the sides of the channel to which the fluid-polymer adheres.

Abstract: Expansion joints for concrete highways consisting of precast beams with preformed joints of expansion joint material. The beams are laid crosswise of a strip of highway before pouring the concrete and provide expansion joints which are not affected by the skill of the workmen.

Abstract: A dowel insertion apparatus and process is disclosed for the insertion of a plurality of joining dowels in freshly placed concrete slabs. Each dowel is grasped each by an individual inserter. Typically the inserter is mounted from a carrier and includes paired tangs having female dowel receiving ends of arcuate configuration at the lower portion thereof which female arcuate ends precisely mate to and receive the dowels. These tangs are connected at a depth above maximum concrete penetration by an electromagnet. A vibrator is attached to the inserter to liquefy the concrete. A dowel storage bin with distributing conveyor enables a row of inserters mounted to a carrier to distribute a plurality of dowels between two intended joints simultaneously, the dowels being evenly distributed the width of any contraction joint.

Abstract: A method is provided for repairing or preventing the faulting phenomenon in unreinforced concrete highways. Flowable, foamable, curable compositions are injected into the transverse joint between concrete slabs to fill any voids that exist between or under the slabs, and to fix loose incompressible "fines" which are forced beneath the slabs.

Abstract: A variable thickness fabric mat for use at a stress transition zone juncture such as at a bridge-roadway juncture or a railroad crossing-roadway juncture, for more evenly spreading the stress forces from traffic thereover to the underlying support surfaces. The variable thickness mat is preferably formed of non-woven fabric and is of variable thickness in a direction lengthwise of the mat as well as in a direction transverse of the mat.

Abstract: A first elongated steel frame has a dowel mounted thereon at right angles. The dowel projects through an aperture in a compressible filler board thence through a registering opening in a second elongated steel frame. The long dimensions of the two frames are parallel and each frame abuts an opposite surface of the filler board. A cap-like shield covers the free end of the dowel with end clearance to accommodate longitudinal thermal expansion and contraction. The two steel frames are free to move toward and away from each other but are constrained to move in unison in a direction perpendicular to the dowel. By bonding each frame to a respective concrete slab of a pair of adjoining slabs with the filler board co-planar with the joint, the slabs partake of the same freedom of motion in one direction and the same restraint in the other two directions.

Abstract: There is provided a roller for inserting filler material to the proper depth in crevices comprising a circular structure having a central circular section of at least 1/16" of an inch thick but less than 1/4 of an inch thick, a first and second truncated right angle cone sections of a smaller diameter than said central circular section and appended on each side of said central circular section at its base line to which is attached a third or fourth circular section of uniform thickness appended to the truncated side of said conical section. The circular structure is supported on a shaft which shaft is supported by two-support members which are connected to a base plate which may be attached to a handle. This construction allows the worker to grasp the handle and utilizing said circular structure which is free to rotate on said shaft such that the leading edge of said central circular section can be utilized to force filler material to the proper depth in a crevice.

Abstract: A joint former for hardenable material such as concrete comprises two essentially identical web members which are releasably attached to each other by a two-part friction coupling to form an assembly which is generally a T-shaped assembly. Each web is configured along at least one edge to form a first coupling part and along a central portion of at least one surface to form a second complementary coupling part so that any two of such webs can be attached to each other to provide a T-shaped assembly. In use the web forming the body of the T is inserted into the hardenable material, the bar web serving to align and position the inserted web. The bar web is then detached from the inserted web and releasably attached to another essentially identical web to form another T-shaped assembly suitable for use in the manner just described.

Abstract: A method of sealing bridge deck joints on a highway in which the deck members have the road surfacing material removed therefrom and a flexible composition of chips of aggregate in a rubberized binder, such as bitumen, pitch, pitch-tar or tar is inserted in the removed area as a resilient sealing material.

Abstract: A roadway expansion joint and seal is provided which comprises a pair of parallel metal side rails having a flexible membrane secured therebetween. The membrane includes enlarged opposite side edge portions which are mounted within respective C-shaped sockets in the side rails, and the side edge portions of the membrane each include a cavity which permits the side edges to be assembled in the sockets by initially compressing each side edge portion so as to collapse the cavity, while laterally forcing the same into the socket. Once in position, a relatively incompressible material is injected into the cavities of the side edge portions so as to substantially fill the cavities and thereby resist the withdrawal of the side edge portions from the sockets.

Abstract: A roadway sealed expansion joint between roadway sections spaced by an expansion slot, the roadway sections having recesses adjacent and extending longitudinally of the slot. A metal plate bridges the slot and is secured to the bottom of the recess in one of the sections and is movable relative to the bottom of the recess in the other of the sections. Overlying the metal plate is a unitary elastomeric slab with its upper surface aligned with the upper surfaces of the concrete sections and with its edges bonded to the sides of the recesses, this elastomeric slab having a center premolded portion of relatively high elasticity and edge portions which are molded in situ and which are of relatively low elasticity.