Universal Automatic Compactor

About Universal Automatic Compactor

Universal Automatic Compactor is a precision laboratory machine used for automatic compaction of soil and asphalt specimens in accordance with standard testing procedures. It eliminates manual compaction, ensuring uniform density, repeatability, and significant time savings in laboratory operations.

The equipment is designed with a motorized hammer mechanism, adjustable drop height, digital blow counter, and mould holding assembly. It supports both Standard and Modified Proctor tests, as well as CBR and Marshall specimen preparation, making it a versatile solution for geotechnical and civil engineering laboratories.

The machine is widely used in soil testing labs, construction sites, research institutes, and quality control laboratories for achieving consistent compaction results as per international standards.

Key Features

• Fully automatic operation with programmable blow counter
• Dual hammer configuration for different compaction energies
• Adjustable drop height and stroke length
• Digital display for blow count and control
• Rigid frame with mould holding arrangement
• Reduces manual effort and improves test accuracy

Technical Specifications

• Hammer Weight: 2.5 kg / 4.5 kg (standard & modified)
• Drop Height: 300 mm / 450 mm (adjustable)
• Blow Count: Programmable digital counter
• Power Supply: 220230V AC, 50 Hz
• Capacity: Suitable for Proctor, CBR, and Marshall moulds
• Standards: IS:2720 (Part 7 & 8), ASTM D698, D1557, AASHTO T99, T180

Applications

• Standard & Modified Proctor compaction tests
• CBR (California Bearing Ratio) sample preparation
• Soil density and moisture relationship testing
• Asphalt and bitumen specimen compaction

Working Principle

The mould filled with soil or bituminous material is placed in the machine. A motor-driven hammer repeatedly falls from a fixed height, applying controlled compaction energy. The machine automatically stops after reaching the preset number of blows, ensuring uniform and repeatable compaction.