Asphalt Wheel Tracking Device Specimen Molding Machine pneumatic rutting Roller compactor
Applicable Standards
The Hydraulic Wheel-track Molding Machine consists of a temperature control module, pressure control module, the number of Roller Compacted control module, hydraulic, servo cylinders, Roller Compacted wheels, the standard test mold and so on. You can set the temperature of Roller Compacted wheel, Roller Compacted and compacting the number of line loads.
1. This method specifies the preparation of asphalt mixture specimens in the laboratory using the wheel rolling method for use in testing the physical and mechanical properties of asphalt mixtures.
2. The wheel rolling method is suitable for forming plate-shaped specimens measuring 300 mm long, 300 mm wide, and 50-100 mm thick. These specimens can be cut into prismatic specimens using a cutting machine or drilled using a coring machine in the laboratory. The density of the formed specimens shall meet the Marshall standard for compacted specimen density of 100% ± 1%.
3. The thickness of the asphalt mixture specimens can be selected based on the aggregate particle size and project requirements. For asphalt mixtures with a nominal maximum aggregate size of less than or equal to 19 mm, a 300 mm long × 300 mm wide × 50 mm thick plate mold should be used for molding; for asphalt mixtures with a nominal maximum aggregate size of greater than or equal to 26.5 mm, a 300 mm long × 300 mm wide × 80-100 mm thick plate mold should be used for molding.
Technical Parameters
1. Test mold Size: 300mm × 300mm × 50mm; 300mm × 300mm × 100mm
2. Compaction line loads control range: 200 ~ 400 N / cm (factory setting is: 300 N / cm).
Compaction line loads control accuracy: ± 2 N / cm
Compaction line loads control accuracy: ± 2 N / cm
3. Roller Compacted Length: 300mm
4. Roller Compacted times can be set from 0 to 9999 times
5. Roller Compacted speed: 17 per minute round trip (one round trip per Roller Compacted is about 3.5S)
6. Temperature control range: 50 ~ 200 ℃ (factory setting is: 100 ℃).
7. Temperature control accuracy: ± 5 ℃. Oil heating.
8. Bitumen Pneumatic Wheel Tracking Device Rated power: 3.5kW 380V AC,
9. Ambient temperature: 5 ~ 40 ℃.
10. Dimension: 1340 × 700 × 2000mm
11. Weight: 600 kg
Features and Advantages
The Specimen Molding Machine generally produces plate-shaped specimens measuring 300mm long, 300mm wide, and 50-100mm thick. The specimen thickness can be selected based on the aggregate size, and other thicknesses can also be used as needed. Considering the relatively thick asphalt pavement in my country and the widespread use of asphalt-stabilized macadam and large-size asphalt macadam, this revision has removed the 300mm long, 300mm wide, and 40mm thick specimen size. Instead, the test mold should be selected based on the nominal maximum aggregate size to better reflect actual conditions.
For ordinary asphalt mixtures, 50mm thick specimens can be compacted according to the specified number of times. However, for specimens thicker than 50mm, the required number of compactions must be determined through testing. For S-type compacted mixtures, SMA mixtures, and mixtures containing modified asphalt, high-viscosity asphalt, or other modified materials, the number of compaction cycles must also be determined through testing. Because different gradations have different compaction characteristics, the number of compaction cycles required will also vary.
FAQ（Frequently Asked Questions）
1. International Standards & Application Scope
Q: Which international test and compaction standards does this Pneumatic Roller Compactor comply with?
A: This specimen molding machine is engineered to meet EN 12697-33, AASHTO TP320, and BS 598-110 standard specifications. It is specifically designed to fabricate homogeneous asphalt slab specimens under realistic compaction rolling actions for subsequent Wheel Tracking (Rutting) tests (EN 12697-22 / AASHTO T324), Beam Fatigue tests (EN 12697-24), and dynamic modulus slab cutting.
2. Compaction Modes, Load Range & Thickness Control
Q: What compaction modes are supported, and how is the target specimen density/thickness achieved?
A:Dual Compaction Modes: Supports both Compaction to Target Height/Thickness (stops automatically when the preset thickness is reached) and Compaction by Target Load/Number of Passes (controls continuous compaction force up to a preset number of cycles).
Pneumatic Rolling Load: Continuously adjustable vertical rolling load up to 30 kN (3000 kgf) applied through a curved segmental compaction foot or pneumatic tire segment.
Thickness Resolution: Precision linear displacement encoder monitors real-time slab reduction with a resolution of 0.01 mm, accommodating slab thicknesses from 30 mm to 150 mm.
3. Mold Sizes, Segment Types & Custom Configurations
Q: What slab mold dimensions are supported, and can the roller segment be interchanged?
A:Standard Mold Sizes: Ships standard with a 300 *300 mm or 500 *305 mm hardened steel mold assembly (depths: 50 mm, 75 mm, 100 mm). Optional kits for 400 * 305 mm or customized core extraction molds are available.
Roller Foot Types: Equipped with a standard radiused steel compaction sector (simulating a full-scale road roller drum). Interchangeable pneumatic multi-tire compacting segments can be configured upon request.
Preheating Option: Optional mold base heating elements (PID temperature controlled up to 180°C) maintain constant mix temperature during extended compaction cycles.
4. Automation, Control Interface & Data Logging
Q: How are compaction sequences programmed, and does the machine log compaction curves?
A:PLC & Touchscreen: Managed via a high-response PLC and an industrial color touchscreen HMI. Users can easily program multi-stage compaction profiles (e.g., progressive pressure increases across sequential passes).
Real-Time Data Plotting: Live graphical displays illustrate Applied Load vs. Passes and Slab Thickness Reduction vs. Passes.
Data Export: Integrated USB and Ethernet ports enable immediate export of compaction history, pass counts, and density progression files in CSV, Excel, or PDF formats.
5. Pneumatic Source, Power Requirements & Safety Enclosure
Q: What are the compressed air, electrical, and safety requirements for installation?
A:Compressed Air Supply: Requires an external clean, dry industrial air line or dedicated silent air compressor operating at 6–10 bar (0.6–1.0 MPa) with a flow rate of 300 L/min
Electrical Configuration: Available in single-phase 220V/230V (50/60Hz, 1.5–2.2 kW) or three-phase 380V/415V/440V upon request.
Safety Protections: Complete heavy-duty transparent safety enclosure with dual interlock switches (the machine halts immediately if the service doors are opened), physical mechanical travel stops, and an emergency stop button.
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