Under Sealing Concrete Interstate

Under Sealing Concrete Interstate with Polyurethane in Harrisburg, PA

Problem: 

Voids under base concrete pavement slabs of the Pennsylvania Turnpike caused reflective cracking through multiple asphalt pavement overlays and deterioration of the concrete slabs.

Constraints:

Lane closure restraints from traffic volume, special events and adjacent milling and paving.  Work areas had to be open to unrestricted vehicle traffic immediately after work sessions.

Solution:

High density polyurethane injection for under sealing concrete slabs without lifting. Specially-formulated undersealing polyurethane foam was chosen for its slow reaction speed to allow for complete void filling with no lifting.  Micrometers were used to measure for lift; injection was stopped when treated slabs moved 1/100th of an inch.

Result:

Concrete Jack stabilized 38 lane miles of interstate highway using four polyurethane injection crews.