The American Concrete Institute (ACI) has developed one of the most successful nationwide certification efforts devoted exclusively to the concrete industry. The examinations required for certification as a Concrete Field Testing Technician--Grade I cover physical testing of fresh concrete in accordance with standard methods of the American Society for Testing and Materials (ASTM). The following procedures are covered:

  1. Sampling (ASTM C 172)
  2. Slump test (ASTM C 143)
  3. Unit weight test (ASTM C 138)
  4. Air content test, pressure method (ASTM C 231)
  5. Air content test, volumetric method (ASTM C 173)
  6. Making cylinders (ASTM C 31)
  7. Temperature test

Qualifying to receive an ACI certificate requires performing all the test correctly in the practical exam and successfully completing the written exam.