The Asphalt Mixture Automatic Vacuum Sealing Apparatus is a specialized device for automatically vacuum-sealing asphalt mixture samples for conducting tests on density, porosity, and other related parameters.

Automatic Vacuum Sealing Instrument for Asphalt Mixtures

Model:LQ-HJ002

I. Product Overview: LQ-HJ002 Asphalt Mixture Specimen Sealing Apparatus

The LQ-HJ002 Asphalt Mixture Specimen Sealing Apparatus is a professional testing device developed by Hebei Tianqi Xingzi Testing Equipment Co., Ltd., specifically based on the sealing requirements for asphalt mixture specimens in the latest version of JTG 3410-2025 "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering".

This equipment is mainly used for vacuum sealing or heat sealing of asphalt mixture specimens (such as Marshall specimens, freeze-thaw splitting specimens, rutting specimens, etc.) before testing. This prevents moisture loss, contamination, or changes in condition of the specimens during storage or testing, ensuring that the specimens maintain their original performance state in tests such as splitting strength, freeze-thaw cycles, high-temperature stability, and durability. It is one of the core pieces of equipment in the pretreatment process of asphalt mixture laboratory specimens.

II. Applicable Standards

This equipment complies with the relevant requirements of JTG 3410-2025 "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering", and is particularly suitable for tests that specify concrete requirements for specimen sealing, such as T0709, T0729, and T0715.

Furthermore, this equipment meets the following international standards:

ASTM D6752/D6752M-25

ASTM D6857/D6857M-25

AASHTO T 331

III. Product Features

1. Designed specifically for asphalt mixture specimens

Suitable for sealing various asphalt specimens, including Marshall specimens, splitting slab specimens, and rutting slab specimens; Ensures stable moisture content and condition of specimens before curing, vacuum saturation, and freeze-thaw tests.

2. 304 Stainless Steel Vacuum Chamber

Corrosion resistant, easy to clean, and does not deform over long-term use, meeting the high cleanliness and durability requirements of laboratories.

3. Heat sealing + vacuum composite function (optional)

Equipped with a heat sealing strip for rapid sealing of specimens (heat sealing time adjustable: 15~30 seconds); Can also be used with a vacuum system to achieve high-vacuum sealing treatment, meeting different testing needs.

4. Compact structure and easy operation

Spring-loaded lid design for easy operation and labor saving; Small footprint and easy to move, suitable for various asphalt mixture testing laboratories, testing centers, universities, and research institutes.

5. Precise Vacuum Control

Minimum absolute pressure can reach 100Pa, providing high vacuum and excellent sealing performance;

The vacuum pump has a discharge capacity of 1.2 m³/h, enabling rapid and efficient vacuuming.

IV. Detailed Technical Parameters

V. Scope of Application

The LQ-HJ002 Asphalt Mixture Specimen Sealing Tester is widely used in:

Highway Engineering Testing Centers

Asphalt Mixture Laboratories

Engineering Quality Supervision Stations

Materials Laboratories of Research Institutes/Universities

Municipal Engineering and Expressway Construction Materials Research Units

Suitable for specimen pretreatment for the following tests:

Freeze-thaw splitting test (T0729)

Marshall stability test of asphalt mixture (T0709)

Indirect tensile test (splitting test)

Vacuum saturation test of asphalt mixture

Long-term preservation and anti-contamination treatment of specimens