These tests methods are used for quantitative determinations of bitumen in hot-mixed paving mixtures and paving samples for specification acceptance, service evaluation, control and research.

These methods prescribe the solvent or solvents that can be used for the binder extraction and recovery.

We are proposing several models of extraction system, including the Automatic Closed-System Asphalt Analyzer.

The representative bitumen sample can be used to perform other tests such as penetration, softening point, etc. Aggregates, including filler, are also separated and remain available for sample grading.

Operating principle:

The remaining bitumen/solvent solution is distilled and separated in two different tanks. Part of the bitumen/solvent solution can be drained off before distillation and connected to a flask for use with a rotary evaporator to recover a bitumen sample for other tests. The clean distilled solvent is recycled for other extractions.

The asphalt sample (maximum 3.5 kg) is placed in a washing drum lined with a sintered multilayer mesh with openings 0.063, 0.075 or 0.090 mm wide and it is fitted into the washing chamber. Bitumen and filler are separated from the sample by washing with solvent and ultrasonic motion. The mixture of filler/bitumen/solvent is then centrifuged and the filler is separated. The aggregates and filler are dried by forced air circulation and the residue of solvent recovered by condensation. 

The analyzer shall be connected to a suitable water cooling unit to feed the three different cooling coils of the apparatus.

Main Features:

Fully automatic test cycle:

Condensation of solvent vapor in a stainless steel tank including cooling coil

Automatic recovery of solvent by a continuous distillation process

Easy binder recovery for further tests such as penetration, softening point, etc.

7" touch screen swinging panel

Version incorporating a balance for an accurate measurement of asphalt sample (10 Kg ± 0.1 g) also available

High extraction capacity: up to 300 g of filter for each extraction

Automatic sample drying after extraction

Washing of the asphalt sample (up to 3.5 kg) with solvent and ultrasonic motion, with simultaneous heating and rotation of the drum lined with screening mesh

High speed extraction centrifuge for separation of filler from binder solution

Fast connection for rotary evaporator flask available as option

Extraction time reduced to approx. 55 minutes (including drying)

No toxic fumes in the laboratory, conforming to latest anti-pollution requirements

Silent operation.