NATIONAL AIR AND
SPACE MUSEUM
PROBLEM:
On January 21st, 2019, Carla Ramo referred Mr. Tim Mehall (Senior Estimator of Hardesty Concrete) to Coordinated Systems Consulting to design, furnish, and install Carbon Fiber Reinforced Polymer required by the National Air and Space Museum West Terrace Revitalization. The repair details for the revitalization project describe the reinforcement requirements for 12 columns located on Column line 1 and 2 and grid line A to F.
ANALYSIS:
In preparation to laying the CFRP, CSC technicians readied the area for repair by removing signs, stickers, and other obstructions and ensuring a properly cleaned surface. Work then progressed through installation of CFRP. The above photos show the surface prior to preparation as well as a surface ready for the application of the CFRP system.
SOLUTION:
Following proper surface preparation, a prime coat of thickened Tyfo® S Epoxy was applied to the substrate to fill all minor imperfections. The Tyfo® CFRP SCH-41 fabric was then hand saturated to ensure proper impregnation with Tyfo® S Epoxy. Saturated Tyfo® CFRP SCH-41 was then applied to the surface and smoothed to ensure no imperfections during its’ curing process. System was then leveled, set, and sealed using an additional coat of thickened Tyfo® S Epoxy. The following photos show the application process of the CFRP system as well as its’ completion.
After CFRP installation, a thorough inspection of the completed work was done confirming proper installation and that all materials used had been properly recorded. Sample panels were cast for future tensile testing (by others, if required) and provided to Hardestry Concrete. CSC Technicians ensured a clean and orderly work area was left prior to de-mobilization and completion of the CFRP installation.