Tyfo SCH-41S 030622.pdf

TYFO® SCH-41S

Composite using Tyfo® S Epoxy

DESCRIPTION

The Tyfo® SCH-41S Composite is comprised of the Tyfo® S Epoxy and Tyfo® SCH-41S reinforcing fabric. Tyfo® SCH-41S is a custom, uni-directional carbon fabric orientated in the 0o direction. The Tyfo® S Epoxy is a two-component epoxy matrix.

USE

The Tyfo® SCH-41S fabric is combined with Tyfo® S Epoxy to provide an ambient-cure, wet-layup, composite system for strengthening bridges, buildings and other structures.

ADVANTAGES

• Tyfo® Systems are NSF/ANSI Standard 61-G certified

• Proven long-term performance and durability

• Excellent wet-out and handling properties

• 100% solids, solvent-free epoxy matrix

• Low viscosity, long working time

• Ambient cure application

PACKAGING

Tyfo® SCH-41S: 24” x 300 lineal ft. (600 sq. ft.)

Typically ships in 12” x 13” x 27” boxes.

Tyfo® S Epoxy: Pre-measured 5-gallon units with a combined material volume of 4 gallons or in 55-gallon drums.

COVERAGE

Approximately 3 to 4 units of Tyfo® S Epoxy per roll of the Tyfo® SCH-41S fabric.

CONSUMPTION RATE

Fabric-to-epoxy ratio by weight:

For Tyfo® SCH-41S: 1:0.8

SHELF LIFE

Epoxy - two years in original, unopened and properly stored containers.

Fabric - 10 years in proper storage conditions.

STORAGE CONDITIONS

Store epoxy at 60°F to 100°F (15°C to 38°C).

Resin is susceptible to crystallization at temperatures below 50°F. If crystallized, epoxy must be reheated until clear. Store fabric rolls flat, not on ends, and at temperatures below 100°F (38°C). Avoid moisture and water contamination.

Typical Dry Fiber Properties

Material properties are based on standard laboratory conditions (23oC, 50 percent relative humidity.)

Property Typical Test Value

Tensile Strength 600,000 psi (4.1 GPa)

Tensile Modulus 35.0 x 106 psi (242 GPa)

Ultimate Elongation 1.5%

Density 0.065 lbs./in.3 (1.81g/cm3)

Minimum weight per sq. yd. 24 oz (810 g/m2)

Fabric roll weight 103 lbs (47 kg)

Composite Gross Laminate Properties

Property3 ASTM Method

ACI 440.2R

Properties1 Design Properties2

Ultimate Tensile Strength in Primary Fiber Direction

D3039

131,000 psi (903 MPa)

131,000 psi (903 MPa)

Elongation at Break 0.90% 0.90%

Tensile Modulus 14.6 x 106 psi (100 GPa)

12.6 x 106 psi (87 GPa)

Tensile Strength per inch width

D7565

5,240 lbf/in width (918 N/mm)

5,240 lbf/in width (918 N/mm)

Tensile Stiffness per inch width

584 x 103 lbf/in width (102 kN/mm)

504 x 103 lbf/in width (88 kN/mm)

Nominal Laminate Thickness D1777 0.04 in. 0.04 in.

1 Strength is defined as the mean strength (177 ksi) minus 3 standard deviations. Modulus is defined as the reported mean modulus, and elongation is defined as the calculated strain from the design strength and modulus.

2 Tensile modulus is defined as the 5th percentile value representing the 80% lower confidence bound of a 2 parameter Weibull distribution (ASTM D7290).

3 Design values may require additional reduction factors based on expected exposure conditions, type of application, and design life assumptions.

4 Contact FyfeFRP LLC engineers to confirm project specification values and design methodology

Additional Composite Properties

Property4 ASTM Method

Typical Test Values Design Values

Flexural Strength D790

110,000 psi (758 MPa)

82,500 psi (569 MPa)

Flexural Modulus 8.5 x 106 psi (58.6 GPa)

7.0 x 106 psi (48.3 GPa)

Longitudinal Compressive Strength G8 50,000 psi

(344.8 MPa) 42,500 psi (293 MPa)

Longitudinal Compressive Modulus

D149

11.2 x 106 psi (77.2 GPa)

9.5 x 106 psi (65.5 GPa)

Longitudinal Coefficient of Thermal Expansion 3.6 ppm/oF

Transverse Coefficient of Thermal Expansion D570 20.3 ppm/oF

INSTALLATION THE TYFO® SCH-41S SYSTEM

DESIGN

The Tyfo® SCH-41S system is designed to meet specific project criteria dictated by the engineer of record and any relevant building codes and/or guidelines. The design shall be based on the allowable strain for each type of application and the design modulus of the material.

FyfeFRP LLC engineering staff may provide preliminary design, specification wording and application details based on the project requirements.

INSTALLATION

The Tyfo® system is to be installed by FyfeFRP LLC trained and certified applicators in accordance with the FyfeFRP LLC quality control manual, project specifications, and design requirements.

SURFACE PREPARATION

The required surface preparation is dependent on the type of element being strengthened. In general, the surface must be clean, dry and free of protrusions or cavities to prevent voids behind the Tyfo® system. Column surfaces that will receive continuous wraps typically only require a clean, sound substrate. Discontinuous wrapping surfaces (walls, beams, slabs, etc.) require a minimum CSP-2 profile to prepare for bonding, achieved by light sandblast, grinding or other approved methods per ICRI 310.2R- 2013. Tyfo® Composite Anchors may be incorporated in the designs. FyfeFRP LLC engineering staff will provide the proper specifications and details based on project requirements.

MIXING TYFO® S EPOXY

For pre-measured units in 5-gallon containers, pour the contents of component B into the component A container. Mix thoroughly with a low speed mixer at 400 to 600 RPM until uniformly blended. Ensure epoxy is transferred between the A and B buckets. For 55-gallon drums, mix component A and component B per the appropriate weight or volumetric mix ratio. Resin may be heated to achieve desired viscosity (i.e. radiant heating, drum heaters, water bath). Mixed Tyfo® S Epoxy may be thickened by adding up to 7 percent by weight of fumed silica (such as Cab-o-sil TS-720) or approved filler such as HDPE fibers. DO NOT THIN. Solvents will prevent proper cure.

PROTECTIVE COATINGS

Apply a final coat of thickened Tyfo® S Epoxy to all fabric edges, including butt splice, termination points and jacket edges. Paint between 24 and 72 hours after final application of epoxy. If more than 72 hours after application, prepare the surface by light sandblast or hand sanding to lightly etch the surface. Please refer to FyfeFRP LLC’s NSF Listing for the NSF-61G listed application method (www.NSF.org).

LIMITATIONS

Recommended substrate temperature range is 50°F to 100°F (10°C to 38°C). All coating applications to be performed at a minimum of 5.4°F above the dew point. Maintain conditions for the first 48 hours of cure.

Temperatures below 50°F will significantly increase the viscosity of the mixed product. Higher viscosity will reduce fabric penetration, introduce additional air into the system, and extend the cure times beyond 48 hours. DO NOT THIN. Solvents will prevent proper cure.

CAUTION!

Statement of Responsibility: The technical information and application advice in this publication is based on the present state of our best scientific and practical knowledge. As the nature of the information herein is general, no assumption can be made as to the product’s suitability for a particular use or application, and no warranty as to its accuracy, reliability or completeness, either expressed or implied, is given other than those required by State legislation. The owner, his representative or the contractor is responsible for checking the suitability of products for their intended use. Field service, where provided, does not constitute supervisory responsibility.

Suggestions made by the FyfeFRP LLC, either verbally or in writing, may be followed, modified or rejected by the owner, engineer or contractor since they, and not the FyfeFRP LLC, are responsible for carrying out procedure appropriate to a specific application.

Consult safety data sheet (SDS) for more information.

For industrial use only.

Epoxy Material Properties

Cure schedule: 72 hour post-cure at 140°F (60°C)1

Property ASTM Method Typical Test Value

Glass Transition Temperature, Tg D4065/E1356 180°F (82°C)

Tensile Strength D638 Type 1

10,500 psi (72.4 MPa)

Tensile Modulus 461,000 psi (3.18 GPa)

Elongation 5.0%

Compressive Strength D695

12,500 psi (86.2 MPa)

Compressive Modulus 465,000 psi (3.2 GPa)

Flexural Strength D790

17,900 psi (123.4 MPa)

Flexural Modulus 452,000 psi (3.12 GPa)

Shore D Hardness D2240 87±3

Water Absorption (24 hours) Water Absorption (13 weeks) D570 0.33%

1.98%

Adhesion Strength2

Concrete (ASTM D7522) Steel Epoxy

D4541

>400 psi (concrete failure typ.)

>1200 psi >1200 psi

1 Testing temperature: 73°F (23°C).

2 Adhesion strength dependent on surface preparation and substrate thickness. Concrete adhesion strength is dependent on the concrete strength and is based on a minimum CSP-2 profile. Steel adhesion strength is based on SSPC-SP10 and SSPC-SP11 surface preparation methods. Cure schedule: 7 days at 73°F (23°C).

CLEANUP

Collect with absorbent material. Dispose in accordance with local disposal regulations. Uncured material can be removed with approved solvent. Cured materials must be mechanically removed.

HAZARDS

Consult the Safety Data Sheets (SDS) for associated hazards. SDS will be supplied upon request.

V: 03.06.2022© 2022 FyfeFRP, LLC. All rights reserved. Fyfe® and Tyfo® are the registered trademarks of FyfeFRP, LLC.

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