Joint Stabilizer Toronto Pearson Airport Case Study

TORONTO PEARSON AIRPORT JOB DETAILS: MARKET: Transportation PRODUCT: Joint Stabilizer DATE: 2012

BEFORE

INSTALLATION

SUBSTRATE: Prepared Concrete CONTRACTOR: In-House ENGINEER: In-House LOCATION: Toronto, Ontario AFTER

Stonhard Construction Solutions, in conjunction with the Engineering Team at Toronto Pearson Airport recently undertook a Joint Stabilizer installation on the concrete aprons located on the approach to Gate C25. This area is on the wheel path run into the docking facility for passenger aircraft, this particular joint could be shut down without impacting other gates or surrounding areas.

application with a Volvo Front End Loader. The deflection as the vehicle travelled over the joint was measured with a Face Consultants Dipstick.

Following the initial testing, the positions of the Stabilizers were plotted. In this instance we tried two differing configurations of Stabilizer Placement, one at half the normal spacing and the balance at the normal spacing, but with two stabilizers placed The movement of the joint was assessed both prior per hole. This was due to the thickness of the slab to the application of the Joint Stabilizers and post which was measured at 13 inches.

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In total, 16 holes were drilled and 22 Stabilizers placed. All holes were 3" in diameter and drilled to the full depth of the slab. The bottom of each hole was filled with expanding foam to prevent any water siphoning up through the stabilizer as the concrete slab was loaded.

One 1 ½" epoxy coated steel dowel bar was drilled through during the application process.

The Stabilizers were placed then torqued to 85lbs/ft as required, in areas where two Stabilizers were required, the first was inserted and torqued and then the second placed over the top. We used a combination of 7” Stabilizers and either a 6” or 5” above.

Lower Stabilizer is aligned with the direction of the joint, then torqued to 85lbs/ft.

To prevent the Stabilizer’s dropping too far into the holes, they are hand tightened to open them out slightly then tapped into place.

The area was then cleaned and post application readings were taken.

Conclusion: The Joint Stabilizers improved the deflection in the slab between 75-100%. In each case, the movement was bought down to a level deemed to be acceptable from a damage limitation perspective.

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