PRECAST PAVEMENT

Concrete Pavement Systems

Precast Pavement Systems

The two most common precast concrete pavement systems (PCPS) are jointed precast pavement systems (JPPS) and precast prestressed concrete pavement (PPCP).

Jointed Precast Pavement Systems

Jointed precast pavement systems consist of precast panels designed to expand and contract at each panel joint. It doesn’t require structural reinforcing steel for service loads but does need to be reinforced for handling and transportation. Jointed precast pavement system panels can also be reinforced by prestressing, leading to reduced panel thickness.

Jointed precast pavement systems are easily integrated with the surrounding pavements. The panels are sized and jointed to match the surrounding pavement, so the slabs will expand and contract similar to the surrounding preexisting pavement. Jointed precast pavement systems are also more easily fabricated than precast prestressed concrete pavement as there are no post-tensioning blockouts and prestressing ducts, which require precision to place to ensure constructability. In addition, jointed precast pavement systems are smaller and easier to transport.

Jointed precast pavement systems are the best option for intermittent repair applications and are also useful in continuous repairs of all lengths. They have successfully been used in the following applications:

  • Intermittent repair
  • Continuous installations on mainlines and ramps
  • Intersections
  • Underpasses at bridges
  • Bridge approach slabs
  • City streets
  • Bus pads
  • Airfield runways, taxiways, and aprons

Precast Prestressed Concrete Pavement

PPCP consists of precast panels tied together with post-tensioning after installation on the worksite. The pavement slab is prestressed in two directions, enhancing the structural characteristics of the panel, counteracting load and temperature-related stresses, and keeping joints tightly closed.

PPCP has a proven track record for reduced cracking, reduced slab thickness, and increased structural capacity. Prestressing helps compensate for nonuniformities in support which could be present before installing a base to fill small voids under the slabs. Prestressing also helps keep the joints between panel tightly closed, which can improve ride quality over each assembled slab.

CONTACT US

Tell us about your pavement needs

We welcome your questions and comments about anything.