FILTERLESS CENTIFUGE EXTRACTOR AZA0947

Principle of Operation

A known weight of bituminous mixture is placed inside the rotating extractor bowl. A suitable solvent (such as trichloroethylene or methylene chloride) is added to dissolve the bitumen binder. During rotation, centrifugal force separates the dissolved binder–solvent solution through a permanent fine mesh or screen integrated within the bowl, while retaining aggregate particles inside.

The extraction cycle is repeated until the aggregate is visibly clean. The aggregate is then dried and weighed, and the bitumen content is calculated by difference from the original sample weight. The collected solvent–bitumen solution may be processed further using a solvent recovery unit (e.g., AZA0949) for reuse of solvent and recovery of binder.

Key Advantages

• Filterless Design: No disposable filter papers required, reducing operating cost and preparation time.
• Rapid Testing: Faster extraction cycles enable higher laboratory throughput.
• High Accuracy: Uniform centrifugal separation ensures precise determination of bitumen content.
• Reduced Error: Eliminates errors associated with torn, saturated, or improperly seated filter papers.
• Durable Construction: Designed for continuous use in demanding laboratory environments.

Applications

• Bitumen content determination in hot mix asphalt (HMA)
• Quality control at asphalt batching plants
• Mix design verification and compliance testing
• Aggregate recovery for post-extraction sieve analysis
• Pavement research and academic studies

Standards Compliance

• ASTM D2172 – Quantitative Extraction of Asphalt Binder from Asphalt Mixtures
• AASHTO T164 – Quantitative Extraction of Asphalt Binder from HMA
• IS 2720 (Part 4) – Sieve analysis of recovered aggregate (post-extraction)
• Widely accepted under MoRTH specifications for Indian road projects

Technical Specifications

Safety Features

• Lid safety interlock to prevent operation when open
• Enclosed chamber to contain solvent vapors and splashing
• Integrated braking system for rapid rotor stop

Standard Supply

• Filterless rotating bowl with integrated mesh
• Bowl cover
• Collecting pan / receiver
• Locking nut and spanner

Optional Accessories

• Solvent Recovery Unit (AZA0949)
• Suitable extraction solvents
• Drying oven for recovered aggregate
• Electronic balance for precision weighing

Frequently Asked Questions (FAQ)

Q1: What is the main benefit of the filterless design?
The filterless system eliminates consumable filter papers, reducing cost, preparation time, and handling errors.

Q2: Which standards does the AZA0947 comply with?
It conforms to ASTM D2172, AASHTO T164, and relevant IS 2720 procedures for aggregate analysis.

Q3: Is solvent recovery possible?
Yes. The extracted solution can be processed using a solvent recovery unit such as AZA0949.

Q4: Is the equipment suitable for continuous laboratory use?
Yes. The robust construction and high-torque motor make it suitable for routine QC and research applications.

Q5: What sample capacities are available?
Typical configurations include 1500 g, 3000 g, and 5000 g capacities, depending on project requirements.

Summary of Features

• Filterless centrifugal extraction system
• Rapid and accurate bitumen content determination
• Reduced operating cost and consumables
• High safety with enclosed, interlocked design
• Fully compliant with ASTM, AASHTO, and IS practices

The AZA0947 Filterless Centrifuge Extractor is an ideal solution for laboratories seeking faster testing, lower consumable usage, and reliable compliance with international pavement testing standards.