AZA 0989 DORRY ABRASION TESTING MACHINE

Description

The AZA 0989 Dorry Abrasion Testing Machine is a precision laboratory instrument designed to evaluate the abrasion resistance of coarse aggregates used in construction, road building, and railway ballast. Manufactured by Azalab, this equipment helps engineers and researchers determine the durability and wear characteristics of aggregates subjected to mechanical forces during service life.

In infrastructure projects, materials like aggregates undergo constant stress from traffic loads, weathering, and mechanical impacts. Assessing abrasion resistance is crucial because it influences the lifespan and maintenance needs of pavements and concrete structures. The Dorry Abrasion Test simulates this wear process under controlled laboratory conditions, providing repeatable, reliable results to ensure aggregate quality.

How the AZA 0989 Works

The testing machine features a rotating steel disc driven by a motor, upon which a steel cylinder containing the aggregate sample is mounted. A loading arm applies a constant vertical pressure to the sample through a weight. The disc rotates at a controlled speed, causing the aggregate particles to rub against an abrasive material (typically emery powder) inside the cylinder.

This frictional action replicates the abrasive wear aggregates experience in real-life conditions. After a prescribed number of rotations (usually 200–300), the sample is removed, dried, and weighed. The abrasion loss or weight loss percentage is calculated, indicating the sample’s resistance to wear.

Importance of Abrasion Resistance Testing

The abrasion value derived from this test helps in:

• Quality control: Ensuring that the aggregates meet durability requirements for specific construction projects.

• Material selection: Choosing aggregates best suited for high-stress environments such as highways, airport runways, and railway beds.

• Design validation: Assisting engineers in formulating concrete mixes or pavement designs with durable materials to maximize service life.

The AZA 0989 Dorry Abrasion Testing Machine by Azalab is an advanced lab instrument designed for evaluating the abrasion resistance of coarse aggregates. It is primarily used to determine the suitability of aggregates for high-durability construction such as roads, railways, airport runways, and concrete structures.

In heavy-load applications, aggregates are subjected to significant mechanical stress, causing wear over time. The Dorry Abrasion Test simulates this process under controlled conditions, offering precise and repeatable results that help determine material quality and performance.

This machine conforms to the IS 2386 (Part IV) standard, which outlines the methodology for abrasion testing of coarse aggregates using the Dorry method. It is highly recommended for use in material testing laboratories, R&D centers, civil engineering departments, and construction companies focused on quality control.

✅ How It Works

The Dorry Abrasion Testing Machine consists of a rotating steel disc, a vertical load arm, and a suitable abrasive material (usually emery powder). Aggregates are placed inside a steel cylinder mounted on the disc, and a specified load is applied via the arm. The disc rotates at a constant speed, and as the sample rubs against the abrasive medium, it begins to wear.

After a set number of revolutions, the material is removed, and weight loss is calculated to determine the abrasion value. Lower weight loss indicates more durable aggregates.

🔗 External Follow Links

• IS 2386 (Part IV)

• NPTEL Civil Engineering (Aggregate Testing): 

• ASTM Aggregate Test Standards

These links provide in-depth resources about abrasion testing and aggregate quality standards.

Dorry Abrasion Testing Machine, aggregate wear test, AZA 0989, Azalab

⚙️ Specifications

📚 Applications

• Coarse aggregate abrasion testing

• Road and pavement material analysis

• Railway ballast strength validation

• Bituminous mix and concrete design

• Academic and research institutions

✅ Benefits

• Simple and accurate method for abrasion testing

• Strong frame for stable operation

• Cost-effective for construction material analysis

• Trusted by engineers and lab technicians globally

• Long service life with easy maintenance

❓ Frequently Asked Questions (FAQ)

Q1: What is the Dorry Abrasion Testing Machine used for?
It is used to evaluate the wear resistance of coarse aggregates for construction and road applications.

Q2: Which standard does the AZA 0989 conform to?
The machine conforms to IS 2386 (Part IV) for abrasion testing of aggregates.

Q3: Is this machine suitable for laboratory use?
Yes. It’s designed for academic labs, construction quality control, and R&D settings.

Q4: What type of aggregates can be tested?
Granite, basalt, limestone, and other coarse aggregates used in concrete and road construction.

Q5: Is technical support available?
Yes. Azalab offers installation help, spare parts, and maintenance services.