This procedure measures the amount of the more volatile constituents in cutback asphaltic products. The properties of the residue after distillation are not necessarily characteristic of the bitumen used in the original mixture, nor of the residue which may be left at any particular time after field application of the cutback asphaltic product. The presence of silicone in the cutback may affect the distillation residue by retarding the loss of volatile material after the residue has been poured into the residue container.

• Electric heater supported on a height adjustable platform, with main switch and heater power regulator.
• Chimney 117 mm diameter with insulated metal shield and insulated cover split in two halves.
• Distillation Flask, 500 ml, side-arm.
• Adapter made in glass with angle of 105°.
• Water jacket condenser and nozzle extensor 450 mm.
• Cylinder 100 ml capacity.
• Stand with clamp to hold the glass cooler.