A proctored proficiency test is required to fully complete the VDOT Central Mix Aggregate Plant certification (CMA). It is designed to prove an individuals’ understanding of Sampling Aggregates (AASHTO T2), Reducing Samples of Aggregate to Testing Size (AASHTO T248), Total Moisture Content of Aggregate by Drying (AASHTO T255), Sieve Analysis of Fine & Course Aggregate (AASHTO T27), Materials Finer then No. 200 in Mineral Aggregates by Washing (AASHTO T11), Determining the Liquid Limit of Soils (AASHTO T89), and Determining Plastic Limit & Plasticity Index of Soils (AASHTO T90). The deadline to register for the CMA Proficiency is December 6, 2019, there will be no exceptions. Certifications are provided by VDOT. You must bring a valid ID.
You must have passed the general knowledge portion of the CMA prior to registering for a proficiency test.
You will be emailed an assigned time with site-specific instructions about 1 week before the class.