Instrumentation

A simple and effective laboratory method used to determine the particle density (true density) of soil and fine aggregates using a gas jar and displacement technique.

Key Features

• Accurately determines particle density using water displacement in a gas jar.

• Non-complex setup ideal for academic and field laboratories.

• Glass gas jar with calibrated markings for precise volume measurement.

• Inexpensive and easy-to-use alternative to pycnometers.

• Complies with IS: 2720 (Part 3/Sec 1) and other standard methods.

• Suitable for soils, sands, and fine aggregates.

A Vicat Tester is a laboratory instrument used to determine the Vicat softening point of materials, primarily plastics, rubbers, and other thermoplastic materials. This test measures the temperature at which a material begins to soften under a specified load, providing critical information about the material’s thermal behavior and processing characteristics. The Vicat softening point is an essential parameter for evaluating the heat resistance and processing conditions of thermoplastic materials used in manufacturing and product design.

• Precise Temperature Measurement: The Vicat tester is equipped with a temperature control system that allows for accurate measurement of the softening point of materials. It typically heats the specimen at a controlled rate, while monitoring the point at which the material begins to deform under a specific load.

• Test Method: The Vicat test involves applying a needle or plunger with a specific weight to the material, then heating the sample at a constant rate (usually 50°C per hour) until the needle penetrates a predetermined distance into the specimen. The temperature at which this happens is the Vicat softening point.

• Digital and Manual Models: While traditional Vicat testers are manual, modern versions may feature digital interfaces for enhanced accuracy, ease of operation, and data recording. Digital models often come with pre-set temperature ramps, automatic stopping mechanisms, and data logging capabilities.

• Temperature Range: Vicat testers typically have a wide temperature range, making them suitable for testing a variety of materials, from low-temperature plastics to high-performance thermoplastics. The typical range is between 50°C to 300°C.

• Customizable Settings: Many Vicat testers allow the user to adjust parameters such as heating rate, load weight, and needle penetration depth, depending on the material being tested and the specific requirements of the test.

• User-Friendly Interface: The digital versions of the Vicat tester feature intuitive interfaces, with touchscreens or buttons that allow the user to easily adjust settings and track results in real time. Data is typically displayed in graphical or numerical form for quick interpretation.

• Safety Features: Built-in safety features often include over-temperature protection, auto-shutoff, and alarms to prevent overheating or unsafe conditions during testing.

• Compliance with Standards: The Vicat tester is designed to meet international standards such as ASTM D1525 and ISO 306 for testing the Vicat softening point. This ensures the test results are consistent and comparable across different laboratories and industries.