Zealchon Electronic
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Asphalt mixture theoretical density tester is an instrument used to determine the theoretical maximum relative density of asphalt mixture. It mainly adopts the vacuum method by placing the asphalt mixture sample in a negative pressure container and discharging the air to calculate density based on buoyancy or weighing methods.
Standard Compliance: This instrument complies with the industry standard of the Ministry of Transport "Highway Asphalt and Asphalt Mixture Test Procedure" for determining theoretical large relative density at 25°C.
Determining the theoretical maximum relative density provides critical data for calculating void ratio and compaction degree in mix design, road investigation, and pavement construction quality management. The accuracy of these values directly impacts the control of pavement construction quality.
The tester features a reasonable structure for parallel testing of two samples simultaneously, consisting of a frame, vacuum pump, vibrator, regulating valves, and digital control electrical appliances.
Composed of a vacuum pump used to extract air from the negative pressure container to achieve specified vacuum levels.
Includes a vibration motor and table to help discharge bubbles from the mixture during the vacuuming process.
Available in types A, B, or C (usually 4000ml or 4300ml), made from stainless steel or plexiglass to hold samples and water.
Features a single-chip microcomputer and display screen for automatic control of vacuum degree, vibration time, and frequency.
Includes vacuum gauges and pressure sensors to monitor real-time changes and balances for accurate mass weighing.
| 1. Oscillation Mode | Continuous/Interval |
| 2. Amplitude | 0.2mm |
| 3. Vacuum Negative Pressure Range | -0.1MPa ~ 1 standard atmosphere (adjustable) |
| 4. Container Negative Pressure | 3.7kPa ± 0.3 kPa (27.5mmHg ± 2.5 mmHg), Digital real-time display |
| 5. Pumping Power | 120W |
| 6. Timer | User-settable |
| 7. Vacuum Barrel | 2 pieces of plexiglass; 4300ml capacity each; Ø190mm × 170mm depth |
| 8. Power Supply | 220V ± 10% |
| 9. Dimensions | 500 × 500 × 500mm |
