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FCS Concrete Repairs is one of the leading structural strengthening contractors in Sydney and have completed many Carbon Fibre Reinforced Polymer (CFRP) based concrete strengthening projects, and is a preferred and approved contractor for:
Sika® Carbodur®, SIKA® CARBOSHEAR®, Sika Wrap® Systems. MasterBrace 4000®, MasterBrace® Laminate
Our Recent Projects
FCS Concrete uses Pull-off Testing technology to ensure bonding strength of underlying structure before application of Carbon Fibre Reinforced Polymer (CFRP) structural strengthening material.
What is Carbon Fiber Reinforced Polymer (CFRP)?
Carbon fiber reinforced polymer (CFRP) is a type of composite material consisting of carbon fiber and polymer. The carbon fiber provides the strength and stiffness while the polymer acts as a cohesive matrix to protect and hold the fibers together. Carbon fiber is a highly proven technology that has been used for years for the strengthening of concrete bridges, construction of commercial buildings and high rises, multi level parking structures, foundations, and almost anywhere extreme strength is needed. Originally developed for NASA and the U.S. Military for applications demanding extreme strength, CFRP is now applicable to many industrial, commercial, and consumer applications.
Over the past two decades, CFRP has become a notable and preferred material in many structural engineering applications. Carbon fiber reinforced polymer provides remedies for many problems associated with the deterioration of infrastructure such as bridges and buildings. It is a cost-effective solution and is proven throughout multiple industries to be a highly effective product for structural reinforcement. Using CFRP in new concrete can eliminate potential corrosion problems and substantially increase a building’s structural strength. It is a thin wall application, making it non-intrusive and easy to paint over, making it simple to hide repairs. It’s tensile strength is stronger than steel, and carbon fiber straps will not rust or deteriorate.
CFRP are manufactured as strips, bars, and sheets using different production techniques like filament winding, pultrusion, and hand lay-up processes. CFRP is a proven solution that is more cost-effective than traditional strengthening techniques.
How can I use CFRP?
Applications where carbon fiber reinforcement can be used include:
- Crack prevention or crack reduction
- Beam strengthening
- Seismic upgrading or earthquake damage repair
- Strengthening after structural modifications
- Pre-stressed strengthening
- Column strengthening
- Increase load capacities
- Compensate for construction or design defects
- Allow modification or removal of existing structural elements such as columns, walls, and slabs
In particular, CFRP can be used as the best solution to foundational problems. Typically used in basement foundation repairs, CFRP helps with horizontal wall cracks and slightly bowed walls.
What are the benefits of using CFRP?<br />
There are many advantages of using CFRP over traditional systems. CFRP is:
- Alkali resistant
- Acid resistant
- Low thermal conductivity
- Short curing time, leading to shorter application time
- High ultimate strain
- High fatigue resistance
- Bad conductor of electricity
- Easy to handle and install
- Low aesthetic impact
- Flexible, and can be easily wrapped around complex shapes
What are the conditions for use?<br />
The existing concrete substrate strength is important for bonded materials and must have sufficient strength to transfer the flexural or shear stresses. Temperature and surface moisture of concrete affect the performance of the CFRP system and surface preparation to create a bond between the CFRP and the existing concrete is critical.
Curing of the CFRP system depends on time and temperature. The higher the temperature, the quicker it will cure but 24 to 72 hours can be taken as a guide.
What is the installation process?<br />
The primer penetrates the concrete and epoxy filler is used to provide a smooth surface for bonding while a saturating resin is used to impregnate the fabric and bond it to the prepared substrate a protective coating is applied. Surface preparation is critical to the bond between the CFRP system and the existing concrete. Any existing deterioration or corrosion of internal reinforcement must be resolved prior to installation to prevent delamination of the concrete substrate.
The installation process is quick, low cost, and provides incredible strength. Upon completion, it requires no further attention and is incredibly low maintenance.
CFRP Strengthening Systems Applications
The use of a building or civil engineering structure may change throughout the course of its service life, as for example:
- its whole function can change
- loads can increase,
- higher building standards may be required and the structure must be made compliant.
Get a quote from our director
Licenced Builders Number :292418C