Concrete structures are designed to last, but over time they can suffer from deterioration, increased load demands or changes in use that require strengthening. One of the most effective modern solutions is the use of carbon fibre reinforced polymer (CFRP), which is a lightweight, high-strength material that’s ideal for reinforcing concrete beams and columns.
At Composites Construction UK, we specialise in the design and installation of CFRP systems to strengthen and extend the life of critical structural elements. Here’s how the process works and why it’s become the go-to solution for many engineers, building owners and contractors across the UK.
What is CFRP?
CFRP is made up of carbon fibres embedded in a polymer resin. It’s incredibly strong for its weight (offering tensile strengths many times greater than steel), as well as much lighter and resistant to corrosion. This makes it ideal for use in confined or difficult-to-access spaces where traditional strengthening methods may not be suitable. CFRP can be applied in flexible sheets, strips or bars, depending on the type and scale of reinforcement required.
Strengthening concrete beams
Concrete beams may need strengthening due to cracking, excessive deflection, changes in loading or damage caused by corrosion. CFRP is typically applied to the tension face of the beam (usually the underside) to increase its flexural capacity.
After surface preparation and priming, the CFRP is bonded to the concrete using a high-performance epoxy resin. Once cured, it acts like an external reinforcement layer, significantly improving the beam’s strength and performance under load.
Where shear strengthening is required, CFRP can also be applied in U-wraps around the sides of the beam to improve resistance to diagonal cracking and improve overall durability.
Reinforcing concrete columns
Columns are primarily designed to resist axial loads, but they can also be subject to bending, buckling or seismic activity, especially in older structures that haven’t been designed to modern codes.
To strengthen concrete columns, CFRP is typically applied as a confinement wrap, encircling the column to increase its load-bearing capacity and improve ductility. This is especially useful in seismic retrofitting, where energy absorption and deformation capacity are critical.
The installation is relatively fast and non-intrusive, allowing for strengthening works to be carried out with minimal disruption to ongoing operations, making it ideal for commercial, industrial and public-sector buildings.
The benefits of using CFRP
Compared to traditional methods like steel jacketing or concrete encasement, CFRP offers several advantages:
- High strength-to-weight ratio
- Corrosion resistance
- Minimal increase in structural dimensions
- Fast installation with limited disruption
- Long-term durability and reduced maintenance needs
It’s also more aesthetically discreet, making it a preferred option for heritage structures or visible architectural elements.
You can trust the specialists at CCUK
We bring specialist knowledge, certified installers and extensive experience in delivering CFRP strengthening solutions across the UK. Whether you’re dealing with ageing infrastructure, structural upgrades or damage repair, CFRP offers a cost-effective and future-proof way to reinforce concrete beams and columns, keeping your structures safe, compliant and built to last.
Book your free feasibility survey for carbon Fibre wrap today
If you’ve noticed cracks in your concrete structures, book a free feasibility survey with Composites Construction UK today. We’ll visit your site to see whether carbon Fibre wrap is suited to your requirements and provide a complimentary quote. We look forward to hearing from you!
To learn more about carbon fibre, browse our blog section
When to consider carbon fibre strengthening
FRP vs traditional strengthening
