bejs-bridge-expansion-joint-system-tech-data-sheet-emseal.pdf

PRODUCT DATA SHEET BEJS System Watertight Joint System for Bridges and Roads

BEJS SYSTEM sample shown here is displayed in substrate mock-up

Product Description The BEJS System from Sika Emseal, Bridge Expansion Joint System, builds on a track record of over 30 years of sealing horizontal plane joints with pre-compressed foam sealants.

The System is comprised of a precompressed, silicone-and-foam hybrid installed into field-applied epoxy adhesive on the joint faces;

with the silicone bellows locked to the joint faces with a silicone sealant band (see Fig. 1).

The BEJS System features an innovation in sealant technology in the form of a microsphere-modified, 100% acrylic impregnation infused into the cellular foam base material.

The material is odorless, clean handling, UV stable, non-staining, and features low temperature flexibility not previously available in asphalt, wax, or isobutylene-based predecessors or competitors.

The result is extension of the usability of the product to applications where asphalt and wax-based predecessors did not work well under conditions of thermal shock (rapid opening and closing of joints during large temperature swings). These applications include joint-face adhered installations on bridge decks, wing walls, abutments, jersey barriers, precast panels, etc.

Suitability is further extended to applications in colder geographical regions to which asphalt and wax-based predecessors have not previously been recommended.

Uses

• Watertight, traffic durable, joint-face-adhered, precompressed, primary seal for retrofit and new expansion joints in road bridges, wing walls, abutments, jersey barriers, longitudinal joints, precast panels, etc.

• Ideal for new construction and retrofit bridge preservation of old or failed joint Systems in concrete or rebuilt joint edges. Use in embedded metal angles where demolition or removal of the metal angles is not feasible and where existing joint opening is suited to the movement capability of BEJS.

• Ideal for lasting replacement of failed caulk joints.

Features Watertight – the tensionless silicone bellows are installed just below the deck surface. This ensures watertightness is achieved at the deck surface.

Non-Invasive Anchoring – there are no hard metal-to-concrete connections with the BEJS System. This includes embedded pins, anchors, screws, bolts or tracks, trays or rails. The System is locked to the joint faces by means of the backpressure of the foam; the epoxy adhesive; and the injected silicone sealant band at the joint face to foam and silicone bellows interface.

Continuity of Seal – as in all Emseal expansion joint Systems, continuity of seal through changes in plane and direction is an essential performance differentiator. “Universal 90s*“ Kickout Terminations” and “Custom Transitions” are factory fabricated transition pieces from Emseal that can be installed at inside corners and outside corners as needed and are warranted by Emseal to be watertight through the entire movement capability of the product.

Alternatively, details for field-fabricated transitions from deck to wall, at curbs, sidewalks, parapets, tees, and crosses are available from Emseal.

Movement Capability +60% and -60% (Total 120%) of nominal material size.

Aesthetics & Versatility Standard color is black. Uniform bellows appearance, fuel resistance, and an enhanced ability to handle variations in joint size are among other System features.

Performance

• Substrates must be parallel, plumb and capable of resisting approx. 2.5 psi backpressure from the foam.

• Standard sizes from 1/2” (12mm) to 4” (100mm). Other sizes available subject to review of application: consult Emseal.

• Fuel Resistance: Silicone sealant is not degraded by contact with fuel. Some swelling of the silicone material will normally occur, but it will return to its original shape upon evaporation of the fuel.

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BEJS SYSTEM PRODUCT DATA

AUGUST 2022, PAGE 2 OF 4

Composition

• BEJS is produced by coating an impregnated cellular foam with highway-grade silicone.

• The silicone external facing is factory applied to the foam at a width greater than maximum joint extension and is cured before final compression.

• Silicone application and curing takes place in a factory-controlled environment. In contrast to field applied liquid sealant and backer rod installations, no movement takes place during curing that can cause deformation or stresses in the material.

• When compressed, a bellows is created in the coating. As joint movement occurs the bellows simply folds and unfolds free of tension on the bondline, and virtually free of tensile stresses in the silicone material.

• The foam provides a resilient backing to the silicone coating, making the System capable of resisting reasonable transient point loads.

• BEJS System is precompressed to less than the joint size for easy insertion. After removal from the shrink-wrap and hard board restraining packaging, it expands gradually.

Fig.3: BEJS System in Existing Steel Angles – Retrofit

Fig.5: BEJS System in New or Rebuilt Joint Edges with Nosing Material

Note: Material sizes less than 1 1/4” (30mm) are supplied on 12-LF long reels with a smooth, convex single bellows as shown.Field-injected silicone sealant bands

Epoxy adhesive for joint faces

BEJS acrylic impregnated foam

Factory-applied and cured silicone bellows facing

Damaged concrete at back edges of embedded angles routed and sealed (by others)

Factory-applied and cured silicone bellows facing

Asphalt or concretewearing surface (by others)

Impact – absorbing nosing material (emcrete by emseal or aternative by others)

Optimize rebar spacing & configuration for support Of headers (by others)

Depth of rebar To suit (by others)BEJS impregnated foam Epoxy adhesive both sides of joint faceConcrete structural slab

(by others)

Fig.1: BEJS System in Typical Installation

— New or Retrofit

Field-applied silicone corner beads and sealant band Injected along side of BEJS as shown — both sides

Existing steel angles where removal is not feasible

Fig.2: BEJS-ON-A-REEL for Joints 1/2” (12mm) – 1 1/4” (30mm)

Fig.4: BEJS System in Existing Strip-Seal Retrofit

EMSEAL non-sag epoxy filled strip seal channels

Field-applied silicone sealant installation bands (both sides)

Field-applied silicone sealant corner beads (both sides)

3/4 IN (20mm)*

3/4 IN (20mm)

3/4 IN (20mm)

*Note: When surface edge is chamfered measure distance from the bottom of the chamfer to the top of the bellows.

Installation IMPORTANT: The following instructions are a summary. Refer to “BEJS System Install Data” and job-specific instructions of an Emseal technician for complete procedures.

• Store indoors at room temperature. Expansion is quicker when warm, slower when cold.

• Properly prepare substrates.

• Ensure material nominal size matches joint size.

• Manufacturer recommended minimum installation temperature: 40° F and rising

• Mix epoxy and trowel a thin layer onto the joint faces to at least the depth of the BEJS foam

• Apply a thin layer of epoxy to both sides of the joint face.

• Remove shrink-wrap packaging, hardboard. If necessary, heat using torch to expand material to a snug fit in the joint.

• Insert material into joint with a 3/4” (20mm) recess. For reels recess 1/2” (12mm).

• Join lengths by pushing silicone coated ends firmly together.

• Wipe silicone facing using clean, lint-free rag made damp with solvent.

• Before the epoxy cures, force the tip of the sealant tube between the foam and the substrate and inject a silicone sealant band.

Tool overflow sealant into a cove bead between the top of the silicone bellows and the substrate. Tool silicone between joined lengths so that bellows is not restrained by excess silicone.

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AUGUST 2022, PAGE 3 OF 4

Table 2: Typical Physical Properties of Silicone Coating & Sealant Bands The highway grade silicone coating is cured in a factory environment and installed in the field with the SAME fuel resistant, UV resistant, highway grade silicone. Continuity of seal is achieved using ONLY a single component to join and seal the Preformed Pre-Compressed, Silicone Coated, Self-Expanding Sealant System When sized correctly silicone is NEVER in tension.

Property Value Test Method Single Component Coating Sikasil® WS-295 Coatings, Joints, and Bands

Shore A Hardness Min. 25 ASTM C661

Movement Capability +50%, -50% (Total 100%) ASTM C719

Tensile Strength Min. 175psi ASTM D412

Elongation at Break Min. 600% ASTM D412

Table 1: Typical Physical Properties of Preformed, Precompressed, Foam Supported Silicone Expansion Joint System The base material is an odorless, clean handling, UV stable, non-staining polyurethane open cell foam with 100% acrylic, microsphere-modified, water based impregnation infused into the cellular foam base material Continuity of seal can be achieved using field or factory fabricated transitions.

Property Value Test Method Thermal Movement 500 cycles at -60%, +60% Movement, Pass ASTM E1399

Acrylic Impregnation 100%, Microsphere Modified, Water-based

Base Material Min 5.65 kg/m³ Cellular, High Density, Polyurethane Foam

ASTM D3574

Density Min. 6 lbs/cu ft ASTM D545

Tensile Strength Min. 18 psi ASTM D3574

Elongation Min. 150% ASTM D3574

UV / Moisture Resistance No Changes - 2000 hours, Pass ASTM G155-00A

Compression Set Max 3% ASTM D3574

Temperature Service Range -40°F to 185°F [-40°C to 85°C] ASTM C711

Note: All testing conducted with a minimum silicone coating, at center line of the joint seal (between silicone coating bellows), of 1.5mm

Table 3: Typical Physical Properties of Epoxy Adhesive The 2-component, 100% solids, solvent free, moisture tolerant, high strength, structural epoxy adhesive applied to the substrate at the approximate depth of the joint seal at a paper thin (≈1/16”) thickness.

Property Value Test Method Tensile Strength Min. 2900 psi ASTM D638

Elongation at Break 0.20% ASTM D638

Shear Strength Min. 2700 psi ASTM D732

Bond Strength Hardened Concrete, Min. 3100 psi Steel, Min. 3260 psi

ASTM C882

Compressive Strength Min. 9000 psi ASTM D695

Pot Life 60 minutes (at 72°F)

Tack Free Time 1.5 to 2.5 hours 30 mils (≈1/4”) thick https://bit.ly/3ly5ORD https://usa.sika.com/

AUGUST 2022, PAGE 4 OF 4

EMSEAL JOINT SYSTEMS, LTD

25 Bridle Lane Westborough, MA 01581 USA Phone: 508.836.0280 Fax: 508.836.0281 www.emseal.com

SIKA CORPORATION

201 Polito Avenue Lyndhurst, NJ 07071 USA Phone: +1-800-933-7452 Fax: +1-2019336225 www.usa.sika.com

EMSEAL, LLC

111 Royal Group Crescent Woodbridge, ON L4H 1X9 Canada Phone: +1-416-740-2090 Fax: +1-416-740-0233 www.emseal.com

Product Data Sheet Emseal BEJS System August 2022 Version SE-1.2

Table 4: BEJS SYSTEM Sizing (see “Performance” for movement capabilities & limitations)

Nominal Material Size

(Joint Size at Mean T˚F)

Depth of Seal

Min.

Joint

(closes to)

Max.

Joint

(opens to)

The following sizes are supplied on 12-LF (3.65 M) reels.

See BEJS-ON-A-REEL information sheet.

1/2” (12mm)

1 3/4” (45mm)

1/4” (6mm)

3/4” (20mm)

3/4” (20mm)

1-3/4” (45mm)

5/16” (8mm)

1-1/4” (30mm)

1” (25mm)

1 3/4” (45mm)

3/8” (10mm)

1-1/2” (40mm)

1-1/4” (30mm)

1 3/4” (45mm)

1/2” (12mm)

2” (50mm)

The following sizes are supplied in shrink-wrapped sticks of

6.56 ft. (2 M):

1-1/2” (40mm)

2-1/4” (55mm)

5/8” (16mm)

2-1/2” (65mm)

1-3/4” (45mm)

2-1/4” (55mm)

11/16” (18mm)

3” (75mm)

2” (50mm)

2-1/2” (65mm)

3/4” (20mm)

3 3/8” (80mm)

2-1/4” (55mm)

2-1/2” (65mm)

7/8” (22mm)

3-1/2” (90mm)

2-1/2” (65mm)

2-1/2” (65mm)

1” (25mm)

4” (100mm)

2-3/4” (70mm)

2-3/4” (70mm)

1-1/8” (28mm)

4-1/2” (115mm)

3” (75mm)

2-3/4” (70mm)

1-1/4” (30mm)

4-7/8” (120mm)

3-1/4” (85mm)

3-1/2” (90mm)

1-3/8” (34mm)

5-1/4” (135mm)

3-1/2” (90mm)

3-1/2” (90mm)

1-7/16” (36mm)

5-5/8” (140mm)

3-3/4” (95mm)

3-1/2” (90mm)

1-1/2” (40mm)

6” (150mm)

4” (100mm)

3-1/2” (90mm)

1-5/8” (43mm)

6-3/8” (160mm)

For joint sizes larger than 4-inches consult EMSEAL

Select nominal material size to correspond to joint-gap size at mean temperature.

CAD & Guide Specs Guide specifications and CAD details re available online at Emseal.com or by contacting Emseal.

Warranty Standard or project-specific warranties are available from Sika Emseal on request.

Availability & Price BEJS System is available for shipment internationally. Prices are available from local representatives and/or directly from the manufacturer. Sika Emseal reserves the right to modify or withdraw any product without prior notice.

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