1. Corrosion-free Prestressed Concrete Piles with Stainless Steel Reinforcement Binh H. Bui Research Implementation Manager Principal Investigators: Dr. Kimberly Kurtis, Dr. Lawrence Kahn, Dr. Alvaro Paul, and Dr. Preet Singh Research Project Manager: Supriya Kamatkar

2. How to mitigate corrosion in bridge piles? Corrosion in Bridge Piles Corrosion of concrete piles in marine environments Hamilton III, H.R. (2007), St. George Island Bridge Pile Testing. 2007, FDOT The I-95 at Turtle River Bridge in Brunswick, Georgia

3. Bridge Pile Corrosion in Georgia’s Coastal Counties Replacement of bridges after less than 40 years in service A growing expense for Georgia DOT

4. Stainless Steel Reinforced Piles Develop precast prestressed concrete piles for marine environment with 100+ year service life Use most economical stainless steel Three 16-in. square, 70-ft. piles with stainless steel (1/2-in. strand) Two 70-ft. piles with conventional steel (7/16-in. strand) Different strand sizes to give same prestress force

5. Material Strength, Strand Development Lengths f c ’ = 10.2 ksi GDOT marine pile concrete mix 440 days

6. Conclusions & Implementation Pile construction with 2205 stainless steel strand and 304 transverse reinforcement is identical to that with conventional reinforcement Used for Liberty County bridge opened in June 2016 SS 2205 for strand is now produced in the USA and satisfies “Buy America” requirements

7. Latest Implementation

8. Thank You!Questions? Acknowledgements - GDOT State Bridge Engineers, Mr. Paul Liles and Mr. Ben Rabun along with Research Engineer, Ms. Supriya Kamatkar, the engineers and technicians at Standard Concrete Products Company