Airfields around the world face unique maintenance and repair challenges due to the specific conditions that they are subjected to. These include intense weather conditions, exposure to aggressive chemical substances, and high-frequency, heavy aircraft movements. Over time, these conditions can degrade the quality of concrete taxiways and hard-standings, contributing to increased risk of foreign object damage (FOD).
The Challenge
RAF Waddington had experienced significant issues with their taxiways and hard-standings, which were showing signs of deterioration due to weathering and chemical attacks from aircraft hydraulic fluids. The ground erosion caused by aircraft movements further exacerbated the situation, creating dangerous voids and damage at joint arises. The airfield was looking to find a cost-effective, swift, and durable solution to not only reinstate the damaged areas but also prevent future deterioration and potential FOD threats.
The Solution
Jointline turned to a state-of-the-art repair and coating system, which started with the use of Fastfill, a rapid-hardening, single-pack repair mortar. This compound requires only two hours to cure, significantly minimising downtime and ensuring the taxiway could be quickly reopened to aircraft movements.
Post-Fastfill application, the surfaces were thoroughly prepared and saturated with water. This was followed by the application of Cemprotec EF Primer to seal the surfaces. Next, a 2mm application of Cemprotec E-Floor, a cement and epoxy-modified coating, was applied.
To cure the surface and provide a slip-resistant finish, silica sand was immediately broadcast into the freshly coated surface. The following day, after the sand had time to cure, the excess sand was removed. The surface was then sealed with Sandseal 75, a chemically resistant clear polyurethane, to ensure the longevity of the repair and protection against harsh environmental and operational conditions.
The Benefits
RAF Waddington benefited immensely from this innovative solution. The fast-acting Fastfill repair mortar allowed for quick repair turnarounds, reducing the downtime of the taxiways and minimising disruption to aircraft operations. The protective coatings of Cemprotec EF Primer, E-Floor, and Sandseal 75 added layers of protection against weathering, chemical attacks, and physical erosion.
The application of silica sand offered an added layer of safety, providing a slip-resistant surface that contributed to safer aircraft and ground crew movements. The overall solution was cost-effective, considering the longevity of the repair and the reduced risk of FOD, making it a worthy investment for the airport.
This case study illustrates the potential of leveraging modern repair materials and techniques to mitigate the physical and operational challenges that airfields face, paving the way for more resilient and safer airfield infrastructure worldwide.
