EMSEAL JOINT SYSTEMS LTD. (Westborough, MA)

An expansion joint system includes an element called a core, and a layer of elastomer disposed on the core. The core as well as the layer of elastomer placed on it make up an elongated portion which is designed to be vertically aligned between substrates that are nearly coplanar. The expansion joint system further includes a termination section located at one end of the elongated section and having a flared, rounded end which forms an angle that is elongated and that is designed to redirect fluids, particles or solvents away from the joint system.

Many joints are used in concrete structures and construction systems to support movements caused by seismic or thermal conditions. These joints can be placed to connect the exterior and interior surfaces, such as walls, floors, roofs or the the roofs of buildings or any other construction.

In the case of an exterior joint in the exterior of a wall floor, roof, and so on, that is which is exposed to the elements the joint expansion system must also resist the effects of external environmental conditions. These conditions are likely to be felt in vertical joints as rain, snow, or winds driven ice. Horizontal joints can be affected by rain, snow, or wind.

Particularly with regard the bridge expansion joints, one of the major causes of structural degradation of piers columns and beams on bridges is the leaking or deterioration of joints. De-icing salts, as well as other airborne contaminants could be put directly through expansion joints onto bridges. Possible spalling and corrosion may occur thereby necessitating expensive reconstruction of beams, piers columns, wing walls, and columns and so on.

In addition, certain expansion joint products do not fully take into consideration the irregularity of certain expansion joints. A joint that is expanded may contain multiple transition zones along its length. These may be areas like parapets, columns or other obstructions. The expansion joint follows the obstructions it encounters while moving. In many products, this is a point where the homogeneous nature of the product gets broken. The transitions can be managed by a variety of techniques that include welding, glue, and stitching. It is usually hard or even impossible to prefabricate these transitions to make expansion joints. The exact details of the expansion joints and any dimensions of any transitions are not known at the time of manufacture.

Furthermore, in a lot of products, the afore-referenced transitions present weak spots from both a water proofing aspect and a fire resistant aspect. Fire resistive and expansion joints address both the watertightness aspect. It is typical to install two systems on every expansion joint that requires both water and fire resistance. However, in many cases there is simply not enough room for both a waterproofing and fire rating system.

Accordingly, there exists a need for improved expansion joint systems, which can not only accommodate thermal and/or seismic movements, but also assist in alleviating and/or preventing deterioration of structural features due to environmentalfactors. There is also a need for such expansion joints that also address fire and water resistance in one.

These options address both the above and other needs.

An expansion joint system is described in one aspect. It comprises an inner core and a layer with elastomer. The core as well as the layer containing elastomer form an elongatedsection. The elongated part is oriented vertically among substantially coplanar substrates. The expansion joint also features a termination section on one end. It is located at the elongated section and includes an end with a flare that creates an angle with the elongatedsection. The section is designed to divert fluid, particles, and solvents away from the joint system.

Another feature of an expansion joint system: A core; and a layer of elastomer. The core and the layer of elastomer that is positioned on it create an elongated section. This section is oriented horizontally, with the coplanar substrates. It also includes an end section that slants around the corners. The extension joint also has a section for termination at the end portion that is angled around the corner. The termination section consists of an end with a flare that forms an angle with the vertically-oriented end part. It is intended to channel fluids particles, solvent, or other particles away from the expansion joint system.

According to another aspect, a water and fire resilient expansion joint includes one substrate and a second substrate arranged nearly coplanar with the initial substrate as well as an expansion joint that is situated between the first substrate and the second substrate. The expansion joint system comprises an open-cell foam that has a fire retardant substance in it, and the proportion of fire retardant material in the open celled foam is between 3.5:1 to around 4:1 by weight. Then there is an elastomer-based layer placed on the open foam. The elastomer layer and the open-sealed foam create an elongated piece. This section is laid out vertically between the two substrates. The expansion joint also has a terminus section that is located on the other side of the elongated portion and having a flared edge that forms an angle that is elongated and configured to redirect particles and fluid and/or solvent away from the joint system.

Another feature of a fire- and water-resistant expansion joint system is that it has a first substrate; a secondary substrate, which is coplanar with the first substrate and an expansion mechanism that is able to compress between the first and the second substrate. The system of expansion comprises: open celled foam having a fire retardant material infused into it, and where the proportion of the fire retardant material instilled into the foam that is open is within a range of about 3.5:1 to approximately 4:1 by weight; and a layer of an elastomer disposed on the open celled foam. The foam that is open-sealed as well as the elastomer layer make up an elongated portion. The section is located horizontally in relation to the coplanar first substrate (and second substrate) and features an end section that slants around an angle. The portion at the end of the section is vertically-oriented. The expansion joint also includes a termination section located on the vertically oriented section, which is designed to angle around the corner, the termination section comprising an end with a flare that forms an angle with the vertically-oriented end portion and configured to channel particles and fluids and/or solventaway from the expansion joint system.

Another aspect of the invention is that a terminus section consists of: a core and an elastomer layer that is positioned on it; wherein the termination portion is designed for an expansion joint system that consists of an elongated segment configured to be vertically oriented among coplanar substrates. The termination section is located at the one end of the extended section. It comprises an elongated section that forms an angle with the elongated sections . This angle is able to direct solvents, particles or fluids away.

According to a further aspect, a terminus section is comprised of the core; and an elastomer layer that is positioned on the core in which the termination section is designed to be used in an expansion joint system that comprises an elongated section configured to beoriented horizontally between substantially coplanar substrates and having an end portion that is designed to angle in a corner, the end portion is vertically oriented. The termination section is configured to be placed at the end portion to be angled around the corner. It comprises a flared end configured to create an angle to the vertically inclined end portion, and to direct or particles and/or solvents away from the expansion joint system.

According to an additional point, a kit comprises an end section designed to be attached to an elongated part of an expansion joint. The termination section comprises: a core; and an elastomer layer placed on the core. The terminal section is an end with a flare that can form an angle with a portion of the elongated section and is able to direct particles, fluids or solvents away from the expansion joint system.

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