Micro-Deval Apparatus

Micro-Deval Apparatus: Advanced Aggregate Abrasion Testing

The Micro-Deval Apparatus is an advanced, second-generation machine designed to measure the abrasion resistance and durability of mineral aggregates. This state-of-the-art system is essential for quality control in construction materials, providing reliable data on how aggregates will perform under wear and tear.

The Micro-Deval Test Method

The increasingly popular Micro-Deval test is a superior method for determining aggregate quality. It involves placing a sample of fine or coarse aggregate into a sealed stainless steel jar. An abrasive charge, consisting of up to 5,000g of 9.5mm diameter stainless steel balls, is added along with water. The jar is then rotated at a precise 100rpm for a specified duration, typically two hours.

The quality and durability of the aggregate are determined by calculating the percentage loss of mass after the test, based on gradation analysis. Compared to other abrasion testing methods like the Los Angeles (LA) Abrasion test, the Micro-Deval method is simpler, safer, and more cost-effective. It requires smaller equipment, smaller sample sizes, and a more straightforward procedure, making it a highly efficient choice for modern labs.

Superior Design and Safety

Our Micro-Deval Apparatus is engineered for unparalleled precision and safety, setting it apart from other models on the market.

Advanced Electronic Control: A sophisticated electronic controller with an optical sensor system provides exceptional accuracy. It tracks test time, total revolutions, and the RPM of the jars. This allows tests to be controlled by either elapsed time or total revolutions, ensuring the jars stop within a fraction of a single rotation at test completion. This data also serves as a critical verification of the machine's performance.

Unmatched Safety: The jars rotate securely behind transparent Lexan™ doors equipped with safety interlocks. This design ensures that all moving parts are completely enclosed during operation, eliminating the hazards present in other machines that use unguarded open rollers.

Sturdy and Efficient Construction: The apparatus features a robust, two-tier steel frame. Each tier holds a 5L stainless steel jar (194mm ID x 170mm IH) with a secure locking cover. The rubber-covered rollers are powered by a reliable 3/4hp electric motor through a durable gear transmission and chain drive.

Compliance and Specifications

This Micro-Deval machine meets the rigorous requirements of current ASTM, AASHTO, and various Canadian and Texas DOT test methods. It's important to note that this contemporary version should not be confused with older, European-origin Micro-Deval tests, which utilize different equipment and protocols.

Meets Standards:

• AASHTO T 327
• ASTM D6928
• ASTM D7428
• Tex-461-A
• ONTARIO LS-618

Key Features:

• Industry-Leading Safety & Ease of Use: Designed for safe, straightforward operation.
• Precision Control: Multi-function electronic controller tracks time, speed, and total revolutions for verifiable accuracy.
• Cost-Effective: Smaller equipment size and lower sample quantities simplify the process and reduce operational costs.
• Fully Compliant: Meets stringent ASTM, AASHTO, Canadian, and Texas DOT specifications.
• Enclosed Operation: Lexan™ doors with safety interlocks protect operators from moving parts.

Included Items:

• Micro-Deval Apparatus
• Two (2) Stainless Steel 5L Jars with locking covers
• Two (2) 5,500g Abrasive Charge Sets
• Retrieval Magnet for easy removal of the steel ball charge

To maximize your lab's efficiency and reduce testing turnaround times, consider ordering additional Micro-Deval Jars and Micro-Deval Abrasive Charges.

Product Specifications:

• Electrical: 115V, 60Hz
• Product Dimensions (WxDxH): 20.5 x 13.5 x 38in (521 x 343 x 965mm)