The Asphalt Prism Shear Box Compactor provides the latest in asphalt specimen preparation and mix evaluation technology. The unique shearing action of the Asphalt Prism Shear Box Compactor closely replicates the conditions under which asphalt is placed in the field and produces specimens with excellent homogeneity and volumetric properties, giving an exceptional measure of workability. Asphalt Prism Shear Box Compactor produces high quality asphalt prisms from which beams and cylinders with excellent air voids distribution, homogeneity and particle orientation can be cut.

The Asphalt Prism Shear box Compactor features a PC interface for user entry of compaction parameters, and provides a real-time graphic display of data, e.g. specimen height, vertical stress and air voids per cycle.

The Asphalt Prism Shear Box Compactor also provides an accurate measure of the workability (relative effort required for compaction) of Hot Mix Asphalt (HMA) needed in the field to achieve a target void content.

Technical Specifications:

Shearing motion: Electromechanically driven at 4°

Specimen size: 450 x 150 x 120 - 185 mm (l x w x h)

Vertical stress: Pneumatic user defined up to 2 MPa

Integrated specimen extruder

Specimen Loading: Easy loading with included accessory kit (includes: distribution chute, levelling tool & comb)

Compaction Frequency: 3.7 cycle/min +/- 16 s/cycle

Mould surface: finish smoother than 1.6 µm

Mould hardness: 50 Rockwell C (minimum)

Platen hardness: 50 Rockwell C (minimum)

Numbers of cycles: user definable (unlimited)

Air supply: clean dry air supply at minimum 600 kPa

Loading platen size: 448 x 149 mm (l x w)

Loading platen finish: smoother than 1.6 µm

Size (h x w x d): 1540 x 1765 x 1050 mm

Weight: 1100 kg.