1. Pavement Rehabilitation Method
Full-Depth Reclamation
Pavement Rehabilitation Method
existing asphalt, CABC and a pre-determined depth of the subgrade soils are uniformly pulverized and blended
Chemical additive (cement) and water are added, material is mixed and compacted
“Reclaimed” material acts as a new base material for the placement of a new asphalt course

2. Full-Depth Reclamation
Referenced by NCDOT Section 541
Flexible Pavement Reclamation Using Portland Cement - on NCDOT Geotechnical Engineering Unit website
geotech/supportserv/geopavement/
Then choose “FDRwithcement.pdf”

3. Recently Performed for 2 S&ME Projects
Full-Depth Reclamation
Recently Performed for 2 S&ME Projects
Trinity Industrial Park Roadways (documented with photos herein)
Forsyth Technical Community College Greene Hall Parking Lot

4. Trinity Industrial Park Roadway Prior to Improvement – Subjected to Relatively Heavy Truck Traffic Volume

5. Full-Depth Reclamation
Asphalt pavement had moderate to severe distress with cracking, potholes, and rutting
14 cores encountered 1.25“ to 3.25“ asphalt and 2.25” to 9.75” of aggregate base course
Borings encountered variably compacted, high plasticity clay fill to depths of 2 to 4.5 feet
Trinity Industrial Park Roadway Prior to Improvement – Subjected to Relatively Heavy Truck Traffic Volume

6. Trinity Industrial Park Roadways
Full-Depth Reclamation
Trinity Industrial Park Roadways
Obtained bulk sample of asphalt, base course, soils and performed LABORATORY MIX DESIGN
Mix design for cement contents of 3%, 6% and 9% by weight
Performed standard Proctor test for each cement content
Compressive strength specimen were molded at each cement content – compressive strength testing performed
A target compressive strength between 300 and 400 psi is recommended by research and industry literature for the reclaimed materials
Laboratory test results indicated a compressive strength of 350 psi for approx. 6.5% cement by weight

7. Trinity Industrial Park Roadways
Full-Depth Reclamation
Trinity Industrial Park Roadways
New pavement section – 4 inches asphalt / 12 inches of reclaimed material was recommended as option to conventional remove/replace
Full-Depth Reclamation was bid as well as conventional remove/replace pavement construction
Full-Depth Reclamation was lowest cost

8. Cement placed on existing asphalt Trinity Industrial Park Roadways

9. Materials Pulverized & Mixed - 12 inches deep
Trinity Industrial Park Roadways

10. Trinity Industrial Park Roadways
After Dry Mixing
Trinity Industrial Park Roadways

11. Adding Water & Mixing Again Trinity Industrial Park Roadways

12. Adding Water & Mixing Again Trinity Industrial Park Roadways

13. Trinity Industrial Park Roadways
Reclaimed material was compacted and then proofrolled prior to placement of new asphalt
Reclaimed material was stable during proofroll evaluation
No undercutting was necessary prior to, during, or after FDR was performed
Trinity Industrial Park Roadways

14. Trinity Industrial Park Roadways

15. Trinity Industrial Park Roadways