Ductility Testing Machine

About Ductility Testing Machine

Ductility Testing Machine is a precision laboratory instrument used to determine the ductility (elongation property) of bituminous materials. The test measures the distance in centimeters to which a standard briquette of bitumen can be stretched before breaking under specified conditions of temperature and speed.

The apparatus consists of a water bath with thermostatic temperature control, a motor-driven carriage, briquette mould holders, and a calibrated scale. The sample is pulled apart at a constant speed (typically 50 mm/min) while maintained at a controlled temperature (usually 2527C) to ensure accurate and repeatable results.

It is widely used in civil engineering laboratories, highway construction projects, research institutes, and quality control labs for evaluating the flexibility and binding properties of bitumen.

Key Features

• Motorized carriage with constant pulling speed
• Thermostatically controlled water bath
• Stainless steel inner tank for durability
• Simultaneous testing of up to 3 specimens
• Digital or analog temperature control options
• High accuracy and repeatability

Technical Specifications

• Speed: 50 mm/min (standard)
• Temperature Range: 5C to 30C (with cooling option)
• Specimen Capacity: 3 samples (standard models)
• Power Supply: 220230V AC, 50 Hz
• Material: Mild steel body with SS tank
• Standards: ASTM D113, IS 1208, AASHTO T51, EN 13398

Applications

• Determination of ductility of bitumen and asphalt
• Road construction and pavement design testing
• Quality control in highway projects
• Research and educational laboratories

Working Principle

A molded bitumen specimen (briquette) is placed in the machine and immersed in a temperature-controlled water bath. The two ends are pulled apart at a constant speed until the sample breaks. The elongation distance at the breaking point is recorded as the ductility value.