The equipment is suitable for extracting asphalt binder from mixtures made with petroleum asphalt. By determining the asphalt content (binder ratio), it helps evaluate the quality of asphalt materials during road construction. It is also widely used in pavement investigation and maintenance to analyze asphalt content in existing roads.

Centrifuge Asphalt Extractor for Asphalt Binder Content Testing

Model:TD722-3

I. Product Overview

The TD722-3 Centrifuge Asphalt Extractor is developed and manufactured by Hebei Tianqixingzi Inspection Equipment Co., Ltd. in accordance with the Chinese standard JTG 3410-2025 (T0722). It is designed for determining the asphalt (bitumen) content in asphalt mixtures using the centrifugal extraction method.This instrument is an essential device for highway construction companies, quality control laboratories, research institutes, and educational institutions.

Reference or applicable standards:ASTM D2172, AASHTO T 164, EN 12697-1,JTG 3410-2025

II. Technical Specifications

1.Bowl Capacity: ＞1.5 L

2.Rotational Speed: ≥3000 r/min (adjustable)

3.Power Consumption: 400 W

4.Power Supply: AC 220V, 50 Hz

5.Net Weight: ≈30 kg

6.Dimensions (Diameter × Height): Φ390 × 510 mm

III. Key Features and Advantages

High-speed centrifugal system for efficient asphalt extraction;

Adjustable rotation speed for different test requirements;

Accurate and reliable binder content determination;

Durable structure with stable operation;

Suitable for laboratory and field testing applications;

Easy operation and maintenance;

Compatible with multiple international testing standards.

IV. Installation and Debugging

1. The instrument must be installed on a solid concrete floor (or foundation), ensuring the spindle is vertical. If necessary, the main unit can be secured using the 4-M8 expansion bolts in the mounting holes of the base.

2. The instrument uses 50Hz 220V AC power and a single-phase three-prong flat socket. Grounding must be reliable.

V. Test Procedure

1.Pour industrial trichloroethylene solvent into the beaker containing the sample (or directly into the centrifuge bowl) to fully immerse the specimen, and record the amount of solvent used. After soaking for 30 minutes, stir the mixture gently with a glass rod to ensure the asphalt is fully dissolved.

2.Transfer the mixture and solvent into the centrifuge bowl. Rinse any residue adhering to the beaker and glass rod with a small amount of solvent and add it completely into the bowl.

3.Weigh a clean ring-shaped filter paper with an accuracy of 0.01 g. (Note: The filter paper should not be reused repeatedly. If mineral powder adheres to it, clean it thoroughly with a brush.)

4.Place the filter paper along the upper edge of the centrifuge bowl and secure the lid tightly. Position a recovery container with a capacity of more than 1700 mL under the discharge outlet, and close the liquid inlet on the outer cover.

5.Connect the power supply and start the motor. Turn the control knob to gradually increase the rotational speed of the motor and centrifuge bowl to above 300 r/min. The asphalt solution will flow into the recovery container through the discharge outlet. Stop the machine after the flow is complete.

6.Add fresh solvent through the liquid inlet on the upper cover in an equal amount. After standing for 5 minutes, repeat the operation described in step 5. Repeat this process several times until the discharged solution becomes a clear light yellow color.

7.Stop the machine. Remove the upper cover and the lid of the centrifuge bowl, then carefully take out the ring-shaped filter paper. Dry it by evaporation in a fume hood or indoor environment, and then place it in an oven at 105℃ ± 5℃ for drying. Weigh the mass; the increased mass (m) represents part of the mineral powder.

8.Carefully remove the aggregate from the centrifuge bowl. After evaporation in a fume hood or indoor environment, dry it in an oven at 105℃ ± 5℃ (usually for about 4 hours). Then place it in a desiccator to cool to room temperature and weigh the aggregate mass (m1).

9.Recover the asphalt solution from the collection bottle using a pressure filtration system. The mineral powder that has entered the filtrate can be obtained from the mass increase (m) of the filtrate.

VI. Safety Precautions

Good ventilation or an exhaust system should be maintained during use;

The top cover must not be opened before the equipment has been completely stopped;

The use of solvents must comply with laboratory safety regulations.