The concrete assembly ramps are 13 inches thick. Random fine cracks have developed as a result of the loading and unloading of C-17 aircraft taxiing across them over time. The cracks have enlarged, and additional small cracks have propagated from them. These cracks lead to the formation of concrete fragments, foreign object debris (FOD), which can become airborne and have the potential of being sucked into jet engines causing damage.
Boeing has investigated various methods including epoxy injection for stabilizing the concrete surface to prevent fragmentation and FOD. Surtreat West, LLC was invited to conduct a demonstration of the Surtreat® concrete protection and restoration process on a 750 sq. ft. section of the ramp August 17, 2001.
LEFT: Assembly Ramp 17, test area before SURTREAT application.