LM-IV Asphalt Mixture Maximum Theoretical Density Meter

1、 Scope of application

This instrument is suitable for determining the theoretical maximum relative density of asphalt mixture using vacuum method, and is used for asphalt mixture mix design, road condition investigation, or pavement construction quality management calculation of void ratio, compaction degree, etc. The instrument is not suitable for asphalt mixtures with porous aggregates that have a water absorption rate greater than 3%. This instrument consists of a frame, an imported vacuum extractor, a vibrator, an air valve, a vacuum gauge, an absolute pressure gauge, and other vacuum containers, as well as control electrical appliances. Its structure is reasonable and easy to use, and it can perform parallel tests on two samples simultaneously. This instrument adopts negative pressure control method to avoid the phenomenon of insufficient or excessive vacuum extraction caused by the original equipment. Equipped with a precision pressure regulating device and a high-precision digital absolute pressure sensor, coupled with our newly developed dedicated controller, it can automatically control the negative pressure of the container at 3.7KPa ± 0.3KPa, completely avoiding the requirements of the latest JTG 3410-2025 "Test Code for Asphalt and Asphalt Mixtures in Highway Engineering" T0711-2025 vacuum method mixture theoretical maximum relative density test specification.

2、 Main technical parameters and features:

Technical Specifications:

Power supply voltage: 220V ± 10%

Exhaust fan power: 160W

Vibration motor power: 30W

Pressure range: 0-100kpa

Container capacity: 4300ml x 2 pieces

Net weight: 32kg

Gross weight: 45kg

Dimensions: 520 * 500 * 580mm

Packaging size: 600 * 595 * 620mm

Features:

1. Large screen Chinese LCD display, absolute pressure digital display.

2. Tap the touch screen to operate.

3. Intelligent program control, one click foolproof operation, automatic vacuum control, vibration timing, and pressure relief.

4. The pressure relief speed can be adjusted.