A laboratory apparatus used to determine the stability and flow characteristics of compacted bituminous (asphalt) mixtures — a key test in asphalt mix design and road construction quality control.
Features:
Digital or analog load and flow readout
Motorized loading frame with breaking head to hold cylindrical asphalt specimens
Constant loading rate (typically 50.8 mm/min per ASTM D1559 / AASHTO T245)
Measures maximum load (stability) the sample withstands and the corresponding deformation (flow)
Often paired with a water bath for specimen conditioning before testing