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Micro Deval Apparatus

Conforms to ASTM D6928,  ASTM D7428, and AASHTO T327 test standards Meets current standards, including more stringent Texas DOT requirements. Multi-function electronic controller tracks time, speed, and total revolutions. Easier, safer, and less expensive to operate. Lexan doors and safety interlocks insure no exposed moving parts. The Micro-Deval test measures abrasion resistance and durability of […]

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  • Conforms to ASTM D6928,  ASTM D7428, and AASHTO T327 test standards
  • Meets current standards, including more stringent Texas DOT
    requirements.
  • Multi-function electronic controller tracks time, speed, and
    total revolutions.

  • Easier, safer, and less expensive to operate.
  • Lexan doors and safety interlocks insure no exposed moving
    parts.


The Micro-Deval test measures abrasion resistance and durability of mineral aggregates. An aggregate sample is placed in a sealed stainless steel jar with an abrasive charge of up to 5,000g of 9.5mm diameter stainless steel balls and water, then rotated at 100rpm for two hours. Aggregate quality is determined by percentage loss in gradation results at completion. Smaller equipment size, lower sample quantities and a simpler procedure make the method easier and less costly to perform than traditional methods.


The MD-2000 meets current Canadian ASTM and AASHTO standards, as well as more stringent Texas DOT requirements. This contemporary version of the Micro-Deval test should not be confused with older versions originating in Europe which use different equipment and test protocol. Gilson’s MD-2000 Micro-Deval Apparatus is a second generation, state-of-the-art machine. A sophisticated electronic controller with optical sensing system accurately tracks test time, total revolutions and rpm of jars. Test duration may be controlled by either elapsed time or total revolutions. Jars stop within a fraction of one revolution at test termination. Jar revolution and speed data may also be used as a verification of machine performance.
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