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CatStrong CFRP Development at U. of KY: High Performance Structural Repair

Explore the innovative CatStrong CFRP rods and panels developed at the University of Kentucky. Learn about applications in bridge repair and the strength comparisons with steel, fabric, and laminate. Discover the process and benefits of using high-performance materials in structural repair.

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CatStrong CFRP Development at U. of KY: High Performance Structural Repair

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  1. CatStrongCFRP Rod PanelsDeveloped at U. of KY

  2. CatStrong Fiberglass mesh backing 6” (152 mm) 6” (152 mm) CFRP rods 12” (305 mm) 48” (1219 mm)

  3. CatStrong

  4. CRP-195 vs. Steel WS= 11.45 lb/ft ≈ 26 WC WC = 0.43 lb/ft tS = 0.28 in A36 Steel tC=0.156 in CatStrong CRP-195 1.0 ft 1.0 ft Ultimate Load = 195 kip

  5. CRP-195 vs. CFRP Fabric WF = 0.125 lb/ft ≈ 0.3 WCRP WC = 0.43 lb/ft (without epoxy) (without epoxy) tF =0.16 in SikaWrap Hex 103C CFRP Fabric (4 plys) (with epoxy) tC =0.156 in CatStrong CRP-195 1 ft 1 ft Ultimate Load = 195 kip

  6. CRP-195 vs. CFRP Laminate WL= 0.35 lb/ft WC= 0.43 lb/ft (without epoxy for 2.6 laminates) (without epoxy) tL=0.047 in SikaCarboDur S1012 Ultimate Load = 75 kip/laminate tC=0.156 in CatStrong CRP-195 4 in 4 in 2.4 in 1 ft Ultimate Load = 195 kip

  7. CRP 195 Strength = 195,700 lbs/ft = 88 768 kg/ft = 291 233 kg/m Type 1 Truck W = 40,000 lbs = 18 144 kg Type 3 Truck W = 73,500 lbs = 33 339 kg Type 4 Truck W = 80,000 lbs = 36 287 kg

  8. CatStrong Field Applications

  9. Repair of the KY218 Bridge Over Blue Springs Creek, Hart County, KY First Application of CatSrong CRP80 (week of September 19, 2011) Step 1: Application of resin on concrete girder Step 2: Application of CRP80 on resin Girder strengthened with CRP80 Step 3: Application of resin coat on CRP80

  10. Caldwell Road over Blue Grass Parkway

  11. Caldwell Road over Blue Grass Parkway

  12. Retrofit of Impacted Girderon the Sunnyside-Gotts Road over I-65

  13. Impacted Girder

  14. Impacted Girder

  15. Day 1,2: Preparation of Damaged Zone

  16. Day 3: Bonding Agent on Steel and Concrete

  17. Day 3: Formwork for Repair Mortar

  18. Day 4: Patching of Defects

  19. Day 5: Crack Injection

  20. Day 6: Grinding of Crack Injection Ports

  21. Day 6: Sand Blasting of Retrofit Surface

  22. Day 6: CatStrong CRP 195 Application

  23. Day 6: CFRP Fabric Application

  24. Day 6 (Dawn of Day 7): Retrofitted Zone Retrofitted Girder Stronger Than Original Girder

  25. KY 81 Bridge, McLean County, KY

  26. Removal of Loose Concrete, Rust From Steel, etc. (8/9/12)

  27. Beam Brought Back to Original Shape (8/10/12)

  28. Application of CatStrong (9/17/12)

  29. Application of CFRP Fabric (9/18/12)

  30. Beam After Repair (9/18/12) (Repaired beam is stronger than the original beam when the bridge was first opened to traffic)

  31. Outline - Introduction - High Performance Material -Conclusions - Acknowledgment

  32. Conclusion - HP Materials are now viable alternative construction material - Structural repair is an area where HP Materials - Health Monitoring

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