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

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

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

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

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

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

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

Cement placed on existing asphalt Trinity Industrial Park Roadways

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

Trinity Industrial Park Roadways After Dry Mixing Trinity Industrial Park Roadways

Adding Water & Mixing Again Trinity Industrial Park Roadways

Adding Water & Mixing Again Trinity Industrial Park Roadways

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

Trinity Industrial Park Roadways

Trinity Industrial Park Roadways