In cooperation with the Ontario Ministry of Transportation and the United States Transportation Research Board, researchers at Carleton University in Ottawa, Canada have developed the In-Situ Shear Stiffness Test (InSiSST) - a new field test facility for measuring shear stiffness of compacted asphalt concrete surface layers. To date, various field-testing programs have been conducted to evaluate the in-situ shear stiffness of asphalt concrete mixes using the newly developed InSiSST. In this paper, a brief overview of the InSiSST facility is presented, together with the results of testing completed in Ottawa, Bancroft, Toronto, and at the Long Term Pavement Performance (LTPP) SPS-9A test site located in Petawawa, Ontario. The Petawawa site (870900) is of particular interest as four of the six test sections consist of SuperPave asphalt mixes, while the remaining two sections were designed using the Marshall method.
Samenvatting