Developed to measure the amount of force necessary to shear the interface between pavement layers and the tack coat between them.
Heavy steel frame holds fixed and moveable shear plates. The moveable plate incorporates friction reducing roller bearings to minimize drag between the plates and is centered directly over the shear plane, not offset.
A calibrated spring with a dial indicator controls the amount of lateral load on the specimen.
The apparatus is furnished with insert adapters to allow testing of either 100mm or 150mm diameter cores.
Shear plane gap is 0.5 inches (12.5mm). Maximum shear travel is 0.5 inches (12.5 mm)
Apparatus fits in most standard Marshall Load Frames with a minimum of 10-inches of space.