RenewWrap Carbon Fiber Bars and Tapes

Our line of pre-cured carbon fiber bars and tapes is designed to be used in near surface mounted (NSM) strengthening applications. The bars are made with a textured or ribbed surface to promote good adhesion with the bonding resin.

Applications

• Flexural strengthening of one-way slabs, beams, and walls
• Shear strengthening of beams
• Negative moment strengthening of one-way slabs and beams

 

Contact Us

Applications

• Flexural strengthening of one-way slabs, beams, and walls
• Shear strengthening of beams
• Negative moment strengthening of one-way slabs and beams

 

Contact Us
RenewWrap Carbon Fiber Bars and Tapes
The RenewWrap™ CF bars may be used to strengthen or retrofit a wide range of concrete and masonry structural members where it is necessary to embed the reinforcement for additional protection. Typical applications include negative moment areas on the tops of slabs and decks where vehicular traffic may damage traditional fabric strengthening systems.

 

Technical Documents

Applications

• Flexural strengthening of one-way slabs, beams, and walls
• Shear strengthening of beams
• Negative moment strengthening of one-way slabs and beams

Benefits

• High strength, high modulus bars are corrosion resistant
• Textured surface promotes good adhesion with bond adhesive without special surface preparation of bars
FAQs
RenewWrap Strengthening System
Have questions? Check out our frequently asked questions regarding our RenewWrap FRP system. Contact us if you would like to know more.

An FRP, or fiber-reinforced polymer, is made up of a fiber and a resin. Three types of fibers are used in most FRPs: carbon, fiberglass or Aramid (Kevlar®). Fibers provide the strength and stiffness to an FRP and can also influence other physical properties, such as durability, the coefficient of thermal expansion and density.  

Polymers can be one of many resin types, like epoxy, polyester or PVC. The polymer holds the fibers in alignment, protects the fibers from damage, transfers stress from fiber to fiber, influences the durability of the FRP and chemically resistant and helps to create a usable FRP form like a plate, bar or grid.  

Fibers and polymers must be chemically compatible because not all fiber and polymer combinations result in a usable FRP material. Carbon fibers are manufactured to be compatible with epoxy resins. Its use with other resin types would typically result in sub-optimal performance. 

FRPs are externally bonded to or wrapped around existing concrete or steel members to increase their strength. They can be used where additional rebar or steel plates are desired. FRPs compete with many strengthening techniques but are often the least costly option. 

FRPs are categorized as wet lay-up or pre-cured systems. Wet lay-up is the most common FRP form used in the United States. In this process, dry fabrics made with continuous fibers are wet out with a saturating resin in the field and adhered to or wrapped around an existing concrete member. Heavier weight fabrics may need to be pre-saturated to ensure adequate impregnation of the fibers. Wet lay-up is used for strengthening all types of members because it can easily conform to the shape of a structure and wrap around members, like columns.  

Learn more about FRP installations in our white paper, “The Fundamentals of FRP Strengthening.”

FRPs are structurally very high strength and stiff but lightweight. The lightweight fabrics and easy installation contribute to overall cost savings on most projects by reducing the labor and equipment requirements. The thin and corrosion-resistant material makes for durable and aesthetically pleasing repairs that are unnoticeable to the community once the material has been painted. 

FRPs are used to strengthen or retrofit a wide range of structures. DOTs around the country commonly use FRPs to reinforce the following types of members: 

  • Arch Slabs 

  • Decks and Deck Overhangs 

  • Girders 

  • Pier Caps  

  • Pier Columns 

  • Piles 

  • Retaining Walls 

Learn more about these structural repairs in our white paper, “The Fundamentals of FRP Strengthening.” 

There are many methods that inspectors can use to determine if the FRP repair is acceptable. Visually, the inspector can verify if the contractor is following the correct installation procedure, verify the ply orientation and verify that the correct number of layers is applied.  

There are many inspection techniques employed on FRP projects, but it is important to specify these based on if the project is contact-critical or bond critical and if it is a structural or non-structural application.  

Read more about FRP inspections in our white paper, “The Fundamentals of FRP Strengthening.”

Our Products At Work in the Field


RenewWrap® System: Umpqua River Bridge Strengthening


Reedsport, OR
June 17, 2017

Overview
The Umpqua River Bridge along the Oregon Coast Highway (US 101) is a swing-span bridge flanked by two tied reinforced concrete arches on each side. The bridge was opened in 1936 and was added to the National Register of Historic Places in 2005. Due to the age and deterioration of the bridge, along with increased loading, the structure required strengthening in several locations. The goal of the Oregon DOT was not only to strengthen the deck and beams to support today’s truck loadings, but to keep the bridge in service during construction. 

A detailed analysis of the existing bridge structure revealed the several deficiencies that required attention. The Oregon DOT designed and specified an FRP solution for the flexural deficiencies in the decks of the tied arch spans and interior concrete girders of the approach spans. 

Project Details
ODOT required the positive moment regions of the decks spanning between floor beams to be strengthened using a near surface mounted (NSM) technique and provide a strength equivalent to #4 steel rebar @ 15” o.c. To provide the specified strength RenewWrap™ CF bars were bonded into shallow slots cut into the deck soffit. Pioneer Waterproofing, the FRP installation contractor worked from scaffolding suspended from the bridge over the river to provide full access to the underside of the bridge. Pioneer developed an innovative method for quickly and accurately cutting the slots which was one of the most challenging aspects of the project. 

For the positive moment regions of the interior girders of the approach spans ODOT required additional strength equivalent to one #11 steel rebar. Pioneer installed the RenewWrap CF600 carbon fiber strengthening system to the bottom of the girder to meet ODOT’s requirement. The CFRP was coated to provide UV-protection and an aesthetic finish.

Renew Wrap_Bridge Strengthening_Umpqua_BridgeRenewWrap_Bridge Strengthening_Umpqua_NSM Bar and EpoxyRenewWrap_Bridge Strengthening_Umpqua_Filling SlotsRenewWrap_Bridge Strengthening_Umpqua_Placing BarsRenewWrap_Bridge Strengthening_ Umpqua_Tooling SurfaceRenewWrap_Bridge Strengthening_Umpqua_Scaffolding

In the News
Check out recent articles featuring Milliken Infrastructure and the RenewWrap system.