ROBERT F. KENNEDY GRAN PRIX RACEWAY

Echelon paving train includes two Blaw-Knox material transfer devices.

Aggregate Industries Mid-Atlantic recently won the right to construct a very challenging project. This raceway is 1.7 miles long and a minimum of 45 feet in width. The paving section consists of three lifts of Superpave. Four inches of 25mm Superpave utilizing PG 76-22 liquid asphalt, 3 inches of 19mm Superpave utilizing PG 76-22 liquid and a final 2 inch surface of 12.5mm Superpave utilizing PG 82-22 binder.

The high speed racing facility will feature championship race cars and will be used for the first time in the summer of 2002. Strategic planning was an integral part of the successful construction of this facility. In order to have hot longitudinal construction joints, two Blaw-Knox pavers were used in conjunction with two Blaw-Knox material transfer devices and eight rollers.

Over fifty trucks supplied the 3,800 ton per day paving operation.

Herb Haller of Aggregate Industries Mid-Atlantic was the on sight construction coordinator. Herb always had an additional paver and material transfer device on site in case of equipment failure. Fifty-three trucks were needed for timely delivery of the Superpave.

Both Aggregate Industries plants were utilized to supply materials. The finalsurface course of 3,800 tons was placed in a single day. Annapolis Junction and Waldorf production facilities are both approximately a forty-five minute haul from the race track.

Density was constantly monitored with a Troxler Nuclear Density Gauge. The eight rollers easily achieved compaction of 97%. Ingersoll-Rand rollers included a single DD130, several DD110’s, DD90’s and smaller 5 ton rollers.

Staggered paver operation allowed construction of a hot longitudinal joint.

Fully extended screeds were fed by material transfer devices and a steady steam of trucks.

The second paver exits a tight corner while the intermediate roller compacts mix in next lane.