Patent Application
20170268222
The present invention relates generally to joint systems for use in architectural applications and, more particularly, to an expansion joint system for use in building and construction systems.
Building and construction applications in which materials such as concrete, metal, and glass are used typically employ joint systems that accommodate thermal and/or seismic movements of the various materials thereof and/or intentional movement of various elements relative to each other. These joint systems may be positioned to extend through both the interior and exterior surfaces (e.g., walls, floors, and roofs) of a building or other structure. In the case of an exterior joint in an exterior wall, roof, or floor exposed to external environmental conditions, the joint system should also, to some degree, resist the effects of such conditions. As such, most exterior joints are designed to resist the effects of water. In particular, vertically-oriented exterior joints are designed to resist water in the form of rain, snow, ice, or debris that is driven by wind. Horizontally-oriented joints are designed to resist water in the form of rain, standing water, snow, ice, debris such as sand, and in some circumstances all of these at the same time. Additionally, some horizontal systems may be subjected to pedestrian and/or vehicular traffic and are designed to withstand such traffic.
In the case of interior joints, water tightness aspects are less of an issue than they are in exterior joints, and so products are often designed simply to accommodate building movement. However, interior horizontal joints may also be subject to pedestrian traffic and in some cases vehicular traffic as well.
It has been generally recognized that building joint systems are deficient with respect to fire resistance. In some instances, movement as a result of building joint systems has been shown to create chimney effects which can have consequences with regard to fire containment. This often results in the subversion of fire resistive elements that may be incorporated into the construction of a building. This problem is particularly severe in large high-rise buildings, parking garages, and stadiums where fire may spread too rapidly to allow the structures to be evacuated.
Early designs for fire resistive joints included monolithic blocks of mineral wool or other inorganic materials of either monolithic or composite constructions either in combination with or without a field-applied liquid sealant. In general, these designs were adequate for non-moving joints or control joints where movements were very small. Where movements were larger and the materials were significantly compressed during the normal thermal expansion cycles of the building structure, these designs generally did not function as intended. Indeed, many designs simply lacked the resilience or recovery characteristics required to maintain adequate coverage of the entire joint width throughout the normal thermal cycle (expansion and contraction) that buildings experience. Many of these designs were tested in accordance with accepted standards such as ASTM E-119, which provides for fire exposure testing of building components under static conditions and does not take into account the dynamic nature of expansion joint systems. As described above, this dynamic behavior can contribute to the compromise of the fire resistance properties of some building designs.
Underwriters Laboratories developed UL 2079, a further refinement of ASTM E-119, by adding a cycling regimen to the test. Additionally, U L 2079 stipulates that the design be tested at the maximum joint size. This test is more reflective of real world conditions, and as such, architects and engineers have begun requesting expansion joint products that meet it. Many designs which pass ASTM E-119 without the cycling regime do not pass UL 2079. This may be adequate, as stated above, for non-moving building joints; however, most building expansion joint systems are designed to accommodate some movement as a result of thermal effects (e.g., expansion into the joint and contraction away from the joint) or as a result of seismic movement.
Both expansion joints and fire resistive expansion joints typically address either the water tightness aspects of the expansion joint system or the fire resistive nature of the expansion joint system, as described above, but not both.
Water resistant or water tight expansion joints exist in many forms, but in general they are constructed from materials designed to resist water penetration during the mechanical cycling caused by movement of the building due to thermal effects. These designs do not have fire resistant properties in a sufficient fashion to meet even the lowest fire rating standards. Indeed, many waterproofing materials act as fuel for any fire present, which can lead to a chimney effect that rapidly spreads fire throughout a building.
Conversely, many fire rated expansion joints do not have sufficient ability to resist water penetration to make them suitable for exterior applications. Many designs reliant upon mineral wool, ceramic materials and blankets, and intumescents, alone or in combination with each other, have compromised fire resistance if they come into contact with water. Additionally, as noted above, many fire rated designs cannot accommodate the mechanical cycling due to thermal effects without compromising the fire resistance.
This has resulted in the installation of two systems for each expansion joint where both a fire rating and water resistance is required. In many cases, there simply is not sufficient room in the physical space occupied by the expansion joint to accommodate both a fire rated system and a waterproofing system. In instances where the physical accommodation can be made, the resultant installation involves two products, with each product requiring its own crew of trained installers. Care is exercised such that one installation does not compromise the other.
Many systems also require on-site assembly to create a finished expansion joint system. This is arguably another weakness, as an incorrectly installed or constructed system may compromise fire and water resistance properties. In some cases, these fire resistant expansion joint systems are invasively anchored to the substrate (which may be concrete). Over time, the points at which such systems are anchored are subject to cracking and ultimately spalling, which may subvert the effectiveness of the fire resistance by simply allowing the fire to go around the fire resistant elements of the system.
Many expansion joint products do not fully consider the irregular nature of building expansion joints. It is quite common for an expansion joint to have several transition areas along its length. These may be walls, parapets, columns or other obstructions. As such, the expansion joint product, in some fashion or other, follows the joint. In many products, this is a point of weakness, as the homogeneous nature of the product is interrupted. Methods of handling these transitions include stitching, gluing, and welding. All of these are weak spots from both a water proofing aspect and a fire resistance aspect.
As used herein, the term “waterproof” means that the flow of water is prevented, the term “water resistant” means that the flow of water is inhibited, and the term “fire resistant” means that the spread of fire is inhibited.
In one aspect, the present invention resides in a fire resistant and water resistant expansion joint system comprising a core; and a fire retardant infused into the core. The core infused with the fire retardant is configured to define a profile to facilitate compression of the fire and water resistant expansion joint system when installed between substantially coplanar substrates.
In another aspect, the present invention resides in a fire and water resistant architectural joint system comprising first and second substrates arranged to be at least substantially coplanar and an expansion joint located in compression therebetween. The expansion joint comprises a core having a fire retardant infused therein, wherein a layer comprising the fire retardant material is sandwiched between the material of the core, and the core is not coated with any fire retardant material on any outer surface of the core.
In another aspect, the present invention resides in a fire and water resistant architectural joint system comprising first and second substrates arranged to be at least substantially coplanar and an expansion joint located in compression therebetween. The expansion joint comprises a core having a fire retardant infused therein. Upon compression of the expansion joint and its location between the substrates, the expansion joint accommodates movement between the substrates while imparting fire resistance and water resistance.
In another aspect, the present invention resides in a method of installing a fire and water resistant expansion joint. In the method of installing such a joint, first and second substrates are provided in at least a substantially coplanar arrangement such that a gap is formed between the edges thereof. A fire and water resistant expansion joint system comprising a core infused with a fire retardant is compressed and inserted into the gap between the substrates and allowed to expand to fill the gap.
In the embodiments of the systems described herein, the elastomer material, e.g., provides for waterproofing or water resistance, the fire barrier sealants including intumescent materials provide for fire resistance, and the fire retardant infused core provides for both fire and water resistance, and movement properties. The materials and layers described herein can be assembled and arranged in any suitable order/combination to provide the desired fire and water resistant (and/or waterproofing) properties in any desired direction. For example, the materials can be assembled so as to offer waterproofing or water resistance in one direction and fire resistance in the other direction (e.g., an asymmetrical configuration) or, e.g., in a fashion that offers both waterproofing (or water resistance) and fire resistance in both directions (a symmetrical configuration) through the building joint, or any other desired directions/combinations thereof. The system is delivered to the job site in a pre-compressed state ready for installation into the building joint.
The expansion joint systems and architectural joint systems of the present invention provide a substantially resilient fire resistant and water resistant mechanism that is able to accommodate thermal, seismic, and other building movements while maintaining both fire and water resistance characteristics.
The expansion joint system described is best understood by referring to the attached drawings. The expansion joint system as described herein is shown as being installed between concrete substrates. The present invention is not limited in this regard, however, as the expansion joint system may be installed between substrates or surfaces other than concrete. Materials for such substrates or surfaces include, but are not limited to, glass, asphalt, stone (granite, marble, etc.), metal, and the like.
Referring to
Thus, foam 12 merely illustrates one suitable material for the core 12′. Accordingly, examples of materials for the core 12′ include, but are not limited to, foam, e.g., polyurethane foam and/or polyether foam, and can be of an open cell or dense, closed cell construction. Further examples of materials for the core 12′ include paper based products, cardboard, metal, plastics, thermoplastics, dense closed cell foam including polyurethane and polyether open or closed cell foam, cross-linked foam, neoprene foam rubber, urethane, ethyl vinyl acetate (EVA), silicone, a core chemistry (e.g., foam chemistry) which inherently imparts hydrophobic and/or fire resistant characteristics to the core; and/or composites. Combinations of any of the foregoing materials or other suitable materials also can be employed. It is further noted that while foam 12 is primarily referred to herein as a material for the core 12′, the descriptions for foam 12 also can apply to other materials for the core 12′, as explained above.
The core 12′ can be infused with a suitable material including, but not limited to, an acrylic, such as a water-based acrylic chemistry, a wax, a fire retardant material, ultraviolet (UV) stabilizers, and/or polymeric materials, combinations thereof, and so forth. A particularly suitable embodiment is a core 12′ comprising an open celled foam infused with a water-based acrylic chemistry and/or a fire retardant material.
The amount of fire retardant material 60 infused into the core 12′, including the open celled foam embodiment, is between 3.5:1 and 4:1 by weight in ratio with the un-infused foam/core itself, according to embodiments. The resultant uncompressed foam/core, whether comprising a solid block or laminates, has a density of about 130 kg/m3 to about 150 kg/m3 and preferably about 140 kg/m3. Other suitable densities for the resultant core 12′ include between about 50 kg/m3 and about 250 kg/m3, e.g., between about 100 kg/m3 and about 180 kg/m3, and which are capable of providing desired water resistance and/or waterproofing characteristics to the structure.
One type of fire retardant material 60 that may be used is water-based aluminum tri-hydrate (also known as aluminum tri-hydroxide (ATH)). The present invention is not limited in this regard, however, as other fire retardant materials may be used. Such materials include, but are not limited to, metal oxides and other metal hydroxides, aluminum oxides, antimony oxides and hydroxides, iron compounds such as ferrocene, molybdenum trioxide, nitrogen-based compounds, phosphorus based compounds, halogen based compounds, halogens, e.g., fluorine, chlorine, bromine, iodine, astatine, combinations of any of the foregoing materials, and other compounds capable of suppressing combustion and smoke formation.
Several laminations of the polyurethane foam or other suitable material, the number depending on the desired size of the expansion joint, are compiled and then compressed and held at such compression in a suitable fixture, according to embodiments. Similarly, a core 12′ comprising laminations of non-foam material or comprising a solid block of desired material may be compiled and then compressed and held at such compression in a suitable fixture. The fixture is at a width slightly greater than that which the expansion joint is anticipated to experience at the largest possible movement of the adjacent concrete surfaces. At this width, the infused foam laminate or core 12′ is coated with a coating, such as a waterproof elastomer 14 at one surface, according to embodiments. This waterproof elastomer may be a polysulfide, silicone, acrylic, polyurethane, poly-epoxide, silyl-terminated polyether, a formulation of one or more of the foregoing materials with or without other elastomeric components or similar suitable elastomeric coating or liquid sealant materials, or a mixture, blend, or other formulation of one or more of the foregoing. One preferred elastomer coating for application to a horizontal deck where vehicular traffic is expected is Pecora 301, which is a silicone pavement sealant available from Pecora Corporation of Harleysville, Pa. Another preferred elastomeric coating is Dow Corning 888, which is a silicone joint sealant available from Dow Corning Corporation of Midland, Mich. Both of the foregoing elastomers are traffic grade rated sealants. For vertically-oriented expansion joints, exemplary preferred elastomer coatings include Pecora 890, Dow Corning 790, and Dow Corning 795.
Depending on the nature of the adhesive characteristics of the elastomer 14, a primer may be applied to the outer surfaces of the laminations of foam 12 and/or core 12′ prior to the coating with the elastomer 14. Applying such a primer may facilitate the adhesion of the elastomer 14 to the foam 12 and/or core 12′.
The elastomer 14 is tooled or otherwise configured to create a “bellows,” “bullet,” or other suitable profile such that the elastomeric material can be compressed in a uniform and aesthetic fashion while being maintained in a virtually tensionless environment.
The surface of the infused foam laminate and/or core 12′ opposite the surface coated with the waterproofing elastomer 14 is coated with an intumescent material 16, according to embodiments. One type of intumescent material 16 may be a caulk having fire barrier properties. A caulk is generally a silicone, polyurethane, polysulfide, sylil-terminated-polyether, or polyurethane and acrylic sealing agent in latex or elastomeric base. Fire barrier properties are generally imparted to a caulk via the incorporation of one or more fire retardant agents. One preferred intumescent material 16 is 3M CP25WB+, which is a fire barrier caulk available from 3M of St. Paul, Minn. Like the elastomer 14, the intumescent material 16 is tooled or otherwise configured to create a “bellows” profile to facilitate the compression of the foam lamination and/or core 12′.
After tooling or otherwise configuring to have the bellows-type of profile, both the coating of the elastomer 14 and the intumescent material 16 are cured in place on the foam 12 and/or core 12′ while the infused foam lamination and/or core 12′ is held at the prescribed compressed width. After the elastomer 14 and the intumescent material 16 have been cured, the entire composite is removed from the fixture, optionally compressed to less than the nominal size of the material and packaged for shipment to the job site. This first embodiment is suited to horizontal parking deck applications where waterproofing is desired on the top side and fire resistance is desired from beneath, as in the event of a vehicle fire on the parking deck below.
In this system 10, a sealant band and/or corner bead 18 of the elastomer 14 can be applied on the side(s) of the interface between the foam laminate (and/or core 12′) and the concrete substrate 50 to create a water tight seal.
Referring now to
Sealant bands and/or corner beads 22 of the first elastomer 14 can be applied to the sides as with the embodiment described above. Sealant bands and/or corner beads 24 can be applied on top of the second elastomer 15, thereby creating a water tight seal between the concrete substrate 50 and the intumescent material.
Referring now to
In system 30, sealant bands and/or corner beads 38 of the elastomer are applied in a similar fashion as described above and on both sides of the foam 12 and/or core 12′. This creates a water tight elastomer layer on both sides of the foam 12 and/or core 12′.
Referring now to
Moreover, it is noted that layer 15′ is not limited to the exact location within the core 12′ shown in
Accordingly, by tailoring the density as described above to achieve the desired water resistance and/or water proofing properties of the structure, combined with the infused fire retardant in layer 15′, or infused within the core 12′ in any other desired form including a non-layered form, additional layers, e.g. an additional water and/or fire resistant layer on either or both outer surfaces of the core 12′, are not be necessary to achieve a dual functioning water and fire resistant expansion joint system, according to embodiments.
It is noted, however, that additional layers could be employed if desired in the embodiment of
As a further example,
Moreover, embodiments include various combinations of layering and fire retardant infusion (in layer and non-layer form) to achieve, e.g., the dual functioning water and fire resistant expansion joint systems described herein, according to embodiments. For example,
Alternatively, only one layer may be present on either surface of core 12′, such as one layer of a fire barrier material, e.g., sealant, on a surface of the core 12′, which is infused with a fire retardant material in layer 15′ or infused in a non-layer form. Still further, other combinations of suitable layering include, e.g., dual coating 18′ on both surfaces of the core 12′ and in any combination of inner and outer layers, as described above.
It is additionally noted that the embodiments shown in
Accordingly, as further evident from the foregoing, embodiments of the dual functioning fire and water resistant expansion joint systems can comprise various ordering and layering of materials on the outer surfaces of the core 12′. Similarly, a fire retardant material can be infused into the core 12′ in various forms, to create, e.g., a layered “sandwich type” construction with use of, e.g., layer 15′.
In the embodiments described herein, the infused foam laminate and/or core 12′ may be constructed in a manner which insures that substantially the same density of fire retardant 60 is present in the product regardless of the final size of the product, according to embodiments. The starting density of the infused foam/core is approximately 140 kg/m3, according to embodiments. Other suitable densities include between about 80 kg/m3 and about 180 kg/m3. After compression, the infused foam/core density is in the range of about 160-800 kg/m3, according to embodiments. After installation the laminate and/or core 12′ will typically cycle between densities of approximately 750 kg/m3 at the smallest size of the expansion joint to approximately 360-450 kg/m3, e.g., approximately 400-450 kg/m3 (or less) at the maximum size of the joint. A density of 400-450 kg/m3 was determined through experimentation, as a reasonable value which still affords adequate fire retardant capacity, such that the resultant composite expansion joint can pass the UL 2079 test program. Embodiments of the expansion joint system of the present invention are not limited to cycling in the foregoing ranges, e.g., the foam/core may attain densities outside of the herein-described ranges and still pass the UL 2079 test program.
In horizontal expansion joint systems, installation is accomplished by adhering the foam laminate and/or core 12′ to the concrete substrate using an adhesive such as epoxy, according to embodiments. The epoxy or other adhesive is applied to the faces of the expansion joint prior to removing the foam laminate and/or core 12′ from the packaging thereof (such packaging may comprise restraining elements, straps, ties, bands, shrink wrap plastic, or the like). Once the packaging has been removed, the foam laminate and/or core 12′ will begin to expand, and it should be inserted into the joint in the desired orientation further to the application of epoxy or other adhesive materials to the side(s) of the foam laminate and/or core 12′ if so desired. Once the foam lamination and/or core 12′ has expanded to suit the expansion joint, it will become locked in by the combination of the foam back pressure and the adhesive.
In vertical expansion joint systems, an adhesive band may be pre-applied to the foam lamination and/or core 12′. In this case, for installation, the foam laminate and/or core 12′ is removed from the packaging and simply inserted into the space between the concrete surfaces to be joined where it is allowed to expand to meet the concrete substrate. Once this is done, the adhesive band in combination with the back pressure of the foam 12 and/or core 12′ will hold the foam 12 and/or core 12′ in position.
To fill an entire expansion joint, the installation as described above is repeated as needed. To join the end of one foam laminate and/or core 12′ to the end of another in either the horizontal configuration or the vertical configuration, a technique similar to that used with the sealant band and/or corner beads can be employed. After inserting one section of a system (joint) and adhering it securely to the concrete substrate, the next section is readied by placing it in proximity to the first section. A band or bead of the intumescent material and the elastomer material is applied on the end of the foam laminate in the appropriate locations. The next section is removed from the packaging and allowed to expand in close proximity to the previously installed section. When the expansion has taken place and the section is beginning to adhere to the substrates (joint faces), the section is firmly seated against the previously installed section. The outside faces are then tooled to create an aesthetically pleasing seamless interface.
The above mentioned installation procedure is simple, rapid, and has no invasive elements which impinge upon or penetrate the concrete (or other) substrates. This avoids many of the long term problems associated with invasive anchoring of screws into expansion joint faces.
Thus, according to embodiments of the invention disclosed is an expansion joint system. The expansion joint system comprises: a core; and a fire retardant included in the core in an amount effective to pass testing mandated by UL 2079; wherein the core with the fire retardant is configured to facilitate compression of the expansion joint system when installed between substrates by repeatedly expanding and contracting to accommodate movement of the substrates; and the core with the fire retardant included therein is configured to pass the testing mandated by UL 2079. According to aspects of the invention, i) the core with the fire retardant included therein has a density when compressed of about 160 kg/m3 to about 800 kg/m3; and/or ii) a layer comprising the fire retardant is sandwiched between the material of the core; and/or iii) an additional material is included in the core and is selected from the group consisting of an acrylic, a wax, an ultraviolet stabilizer, a polymeric material, and combinations of the foregoing materials; and/or iv) the fire retardant included in the core is selected from the group consisting of water-based aluminum tri-hydrate, metal oxides, metal hydroxides, aluminum oxides, antimony oxides and hydroxides, iron compounds, ferrocene, molybdenum trioxide, nitrogen-containing compounds, phosphorus based compounds, halogen based compounds, halogens, and combinations of the foregoing materials; and/or v) a water resistant layer is disposed on a surface of the core; and/or vi) the water resistant layer is adhesively disposed on the surface of the core and is selected from the group consisting of silicone, polysulfides, acrylics, polyurethanes, poly-epoxides, silyl-terminated polyethers, and combinations of one or more of the foregoing; and/or vii) comprises a fire barrier sealant layer; and/or viii) comprises a layer comprising a caulk; and/or ix) the core uncompressed has a density of about 50 kg/m3 to about 250 kg/m3; and/or x) further comprises a second layer disposed beneath the water resistant layer, wherein the second layer is selected from the group consisting of another water resistant layer, a fire barrier sealant layer, and combinations thereof; and/or xi) a first coating is located on a surface of the core, and a second coating is located on a surface of the core opposing the first coating, wherein the first coating is the substantially the same as or different than the second coating; and/or xii) at least one of the first coating and the second coating comprises a dual coating; and/or xiii) the core is selected from the group consisting of foam, a paper based product, metal, plastic, thermoplastic, and combinations thereof; and/or xiv) the core comprises at least one of polyurethane foam, polyether foam, open cell foam, dense closed cell foam, cross-linked foam, neoprene foam rubber, urethane, cardboard, and a composite; and/or xv) the core is selected from the group consisting of a plurality of laminations, a solid block, and combinations thereof; and/or xvi) the core comprises a plurality of laminations, at least one of the laminations is with the fire retardant included therein; and/or xvii) the lamination with the fire retardant included therein is an inner lamination of the plurality of laminations; and/or xviii) the laminations are oriented, with respect to the direction in which the joint extends in its width, in at least one of a parallel orientation, a perpendicular orientation, and a combination thereof; and/or xix) the expansion joint system is capable of withstanding exposure to a temperature of about 540° C. at about five minutes; and/or xx) the expansion joint system is capable of withstanding exposure to a temperature of about 930° C. at about one hour; and/or xxi) the expansion joint system is capable of withstanding exposure to a temperature of about 1010° C. at about two hours; and/or xxii) the expansion joint system is capable of withstanding exposure to a temperature of about 1052° C. at about three hours; and/or xxiii) the expansion joint system is capable of withstanding exposure to a temperature of about 1093° C. at about four hours; and/or xxiv) the expansion joint system is capable of withstanding exposure to a temperature of about 1260° C. at about eight hours; and/or xxv) the fire retardant is permeated throughout the core in an amount effective to pass testing mandated by UL 2079; and/or xxvi) the core with the fire retardant included therein when installed cycles and attains a density outside of about 160 kg/m3 to about 800 kg/m3.
According to further embodiments of the invention, disclosed is an architectural joint system. The system comprises: a first substrate; a second substrate; and an expansion joint located between the first substrate and the second substrate. The expansion joint comprises: a core having a fire retardant therein in an amount effective to pass testing mandated by UL 2079, wherein the expansion joint is configured to facilitate compression when installed between the first substrate and the second substrate by repeatedly expanding and contracting to accommodate movement therebetween; and the core with the fire retardant included therein is configured to pass the testing mandated by UL 2079. According to aspects of the invention, i) the core with the fire retardant included therein has a density when compressed of about 160 kg/m3 to about 800 kg/m3; and/or ii) a layer comprising the fire retardant is sandwiched between the material of the core; and/or iii) and/or an additional material is included in the core and is selected from the group consisting of an acrylic, a wax, an ultraviolet stabilizer, a polymeric material and combinations of the foregoing materials; and/or iv) the fire retardant infused into the core is selected from the group consisting of water-based aluminum tri-hydrate, metal oxides, metal hydroxides, aluminum oxides, antimony oxides and hydroxides, iron compounds, ferrocene, molybdenum trioxide, nitrogen-containing compounds, and combinations of the foregoing materials; and/or v) the core uncompressed has a density of about 50 kg/m3 to about 250 kg/m3; and/or vi) the core with the fire retardant included therein when installed cycles and attains a density outside of about 160 kg/m3 to about 800 kg/m3; and/or vii) further comprises a fire barrier sealant layer; and/or viii) the system is capable of withstanding exposure to a temperature of about 540° C. at about five minutes; and/or ix) the system is capable of withstanding exposure to a temperature of about 930° C. at about one hour; and/or x) the system is capable of withstanding exposure to a temperature of about 1010° C. at about two hours; and/or xi) the system is capable of withstanding exposure to a temperature of about 1052° C. at about three hours; and/or xii) the system is capable of withstanding exposure to a temperature of about 1093° C. at about four hours; and/or xiii) the system is capable of withstanding exposure to a temperature of about 1260° C. at about eight hours; and/or xiv) the fire retardant is permeated throughout the core in an amount effective to pass testing mandated by UL 2079.
According to further embodiments of the invention, disclosed is an architectural expansion joint system. The system comprises: a first substrate; a second substrate; and an expansion joint located between the first substrate and the second substrate. The expansion joint comprises: a core having a fire retardant included therein in an amount effective to pass testing mandated by UL 2079, and wherein a layer comprising the fire retardant is sandwiched between the material of the core, wherein the expansion joint is configured to facilitate compression of the system when installed between the first substrate and the second substrate by repeatedly expanding and contracting to accommodate movement therebetween; and the core with the fire retardant included therein is configured to pass the testing mandated by UL 2079. According to aspects of the invention, i) a method of installing an expansion joint system utilizing the afore-referenced expansion joint system comprises: providing a first substrate of the substrates; providing a second substrate of the substrates being spaced from the first substrate by a gap; inserting the expansion joint system into the gap between the first substrate and the second substrate; and allowing the compressed expansion joint system to decompress to fill the gap between the first substrate and the second substrate; and/or ii) a layer comprising the fire retardant is sandwiched between the material of the core; and/or iii) the layer comprising the fire retardant is sandwiched between the material of the core and is oriented, with respect to the direction in which the joint extends in its width, in at least one of a parallel orientation, a perpendicular orientation, and a combination thereof; and/or iv) the system is capable of withstanding exposure to a temperature of about 540° C. at about five minutes; and/or v) the system is capable of withstanding exposure to a temperature of about 930° C. at about one hour; and/or vi) the system is capable of withstanding exposure to a temperature of about 1010° C. at about two hours; and/or vii) the system is capable of withstanding exposure to a temperature of about 1052° C. at about three hours; and/or viii) the system is capable of withstanding exposure to a temperature of about 1093° C. at about four hours; and/or ix) the system is capable of withstanding exposure to a temperature of about 1260° C. at about eight hours; and/or x) the fire retardant is permeated throughout the core in an amount effective to pass testing mandated by UL 2079; and/or xi) the core with the fire retardant included therein when installed cycles and attains a density outside of about 160 kg/m3 to about 800 kg/m3.
It is further noted that the various embodiments, including constructions, layering and so forth described herein, can be combined in any combination and in any order to result in, e.g., a dual functioning water and fire resistant expansion joint system. Thus, the embodiments described herein are not limited to the specific construction of the figures, as the various materials, layering and so forth described herein can be combined in any desired combination and order.
Although this invention has been shown and described with respect to the detailed embodiments thereof, it will be understood by those of skill in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed in the above detailed description, but that the invention will include all embodiments falling within the scope of this disclosure.
This application is a Continuation application of U.S. patent application Ser. No. 13/729,500, filed on Dec. 28, 2012, now U.S. patent Ser. No. ______, which is a Continuation-in-Part application of U.S. patent application Ser. No. 12/622,574, filed on Nov. 20, 2009, now U.S. Pat. No. 8,365,495, which claims the benefit of U.S. Provisional Patent Application No. 61/116,453, filed on Nov. 20, 2008, the contents of each of which are incorporated herein by reference in their entireties and the benefits of each are fully claimed herein.
| Number | Date | Country | |
|---|---|---|---|
| 61116453 | Nov 2008 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 13729500 | Dec 2012 | US |
| Child | 15613936 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 12622574 | Nov 2009 | US |
| Child | 13729500 | US |
