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Externally Bonded FRP Composites

A painful expectation in asset ownership is that all infrastructure tends to degrade and, if untreated, ultimately fails. Remediation is often costly in terms of both capital and time. Properly designed composite materials afford options in tailorability and custom fitment in ways that conventional materials cannot.

For remediation in aggressive environments, we employ fiber-reinforced polymer (FRP) composites as a differentiating tool in the remedial toolkit. Designed using an advanced analysis tool, FRP structural remediation approaches can be developed to allow us to tailor strength and stiffness to achieve target performance.

Degrading structures require structural strengthening or repair to maintain or improve operating capacity. Conventional material approaches often include remove-and-replace or shoring, which are costly and intrusive. Externally bonded FRP composites allow engineers to design a minimally-intrusive strengthening of pipes, beams and columns by encasing the existing structure with high-strength and stiffness reinforcement embedded in a polymer matrix.


Continuous or field fabricated

A fiber system is bonded externally or into cut grooves to provide the requisite stiffness and strength.


Reinstates structural capacity to deteriorating or overloaded structures

Increased capacity due to changes in use

High strength and stiffness
Resistant to a broad range of chemical and aqueous environments that cause rust and rot

Resins, surface veils and coatings are included to provide protection to underlying structural layers.
Certified safe for potable water (NSF/ANSI Standard 61) and incidental food contact

Product Forms

  • Structural strengthening
  • Pipe repair
  • Fire-resistant systems
  • Ballistic and blast systems

The Bottom Line

Externally bonded FRP composites are ideal for structural remediation and strengthening where:

  • Quantifiable improvement in structural performance of reinforced concrete or steel walls, beams, columns, pipes or other structures is required
  • Installation speed or operational continuity are important to overall project economy
  • Hot works remediation approaches are costly or prohibited
  • Environmental conditions inhibit surface preparation
  • Codified design is required
  • Non-corroding materials will limit or eliminate future maintenance costs; this is unachievable with conventional materials

Like any multi-material solution, design and implementation require extensive knowledge of the mechanical, thermal and corrosion behaviors of all materials in the structural system, as it is susceptible to a variety of failure modes if not properly detailed and monitored for quality during installation.


Contact Us

Composites are not a one-size-fits-all product. We work with every client—from start to finish—to understand their challenges and address their specific needs. Contact us today to discuss how composites can elevate your project.