The TDOT Aggregate Technician is an individual who can demonstrate the knowledge of and ability to interpret the results of aggregate tests as well as perform calculations necessary to report the data from each test.
Scope of Course
AASHTO - R 90/ASTM D75 - Sampling of Aggregates
AASHTO - R 76/ASTM C702 - Reducing Samplesof Aggregate to Testing Size
AASHTO - T 255/ASTM C566 - Total Evaporable Moisture Content of Aggregate by Drying
AASHTO - T 11/ASTM C117 - Materials Finer Than 75-mm (No.200) Sieve in Mineral Aggregates by Washing
AASHTO - T 27/ASTM C136 - Sieve Analysis of Fine and Coarse Aggregates
AASHTO - T 84/ASTM C128 - Specific Gravity and Absorption of Fine Aggregate
AASHTO - T 85/ASTM C127 - Specific Gravity and Absorption of Coarse Aggregate
AASHTO - T 104/ASTM C88 - Soundness of Aggregates by Use of Sodium or Mangesium Sulfate
AASHTO - T 96/ASTM C131 - Resistance to Degradation of Small-Size Coarse Aggregate by Abrasion and Impact in the Los Angeles Machine
- TDOT will grant certificaiton to those applicants who meet both of the following requirements: A passing grade on both the written and performance examinations.
- The written examination is "Closed Book". To pass the written examination a minimum score of 70% is required.
- The performance exam is "Closed Book" and requires demonstration of ability to perfrom and describe AASHTO T 11/ASTM C117 and AASHTO T 27/ASTM C 136.
- Recertification is necessary every five (5) years by successfully completing the written and performance examinations.