Loss on Heat / Rolling Thin Film Oven

Determines the effect of heat and air on a moving film of asphalt to serve as an indicator of approximate change in properties during conventional hot-mixing. The results are reported in terms of the changes in selected properties such as viscosity, penetration and ductility brought about by the RTFO test, as evidenced by test data taken before and after the 75 minute oven cycle.

Conforms to the specifications of: ASTM D2872; AASHTO T240
Touch Screen Display with 4.5" color control panel
Timer Function
Visual Warnings
Digital Air Flow Control

Safety Features:
Automatic Over-Temperature Switch
Door Switch
Pilot Lamp and Alarm for Door Open with Fan still running
Magnetotermic Switch

Double-walled electrically heated convection oven for rolling thin film oven tests on asphalts. Incorporates all required features per ASTM specifications, including: door with double-pane viewing window; symmetrical top and bottom vents; air plenum; squirrel cage-type 1725 rpm fan; digital indicating thermostat to control oven temperature at 163°C ±0.5°C; vertical circular carriage to mechanically rotate the samples at 15±0.2 rpm; air jets to blow heated air into each sample bottle at its lowest point of travel; and a calibrated flowmeter to control air flow at 4000 mL/min. An over-temperature cut-off circuit disconnects power to the unit in the event of control failure.

Dimensions: 29.6 x 29.6 x 35.5"H