This instrument is designed and manufactured in accordance with the People's Republic of China industry standard JTG E20-2011 "Testing Procedures for Highway Engineering Asphalt and Asphalt Mixtures." It specifically addresses the requirements specified in T 0705-2011 (Surface Dry Method), T 0706-2011 (Water Gravity Method), and T 0707-2011 (Wax Seal Method) for density testing of compacted asphalt mixtures.

• Surface dry method testing for various asphalt mixture specimens with water absorption rate ≤ 2% (T 0705 standard)
• Water gravity method testing for dense asphalt mixture specimens with water absorption < 0.5% (T 0706 standard)
• Wax seal method testing for asphalt concrete or asphalt gravel mixture specimens with water absorption rate > 2% (T 0707 standard)
• Weighing aerial mass of dry specimens and calculating gross volume relative density and density (T 0708 standard)

• Multi-functional design meeting requirements for surface dry, water weight, wax seal, and volume methods
• Microcomputer-controlled water bath temperature with simple, reliable operation
• Detachable electrical control box with aviation plug connections
• High-precision electronic balance with large measuring range and stable performance
• Stainless steel overflow water tank with automatic water level stabilization
• Electric lifting mechanism with push rod motor for smooth, quiet operation
• Composite rationalized board work surface providing stable platform

• Power Supply: AC (220±10%) V, 50Hz
• Overflow Tank Dimensions: 440mm × 410mm × 200mm (L×W×H)
• Circulating Water Pump Flow: 10L/min
• Electronic Balance: Maximum weighing 15kg; Sensitivity 0.1g
• Water Bath Temperature Control Accuracy: (25±0.5)℃