Concrete Strength Testing Technician


    A Concrete Strength Testing Technician is an individual who has demonstrated the knowledge and ability to properly perform, record, and report the results of four basic laboratory procedures related to the determination of concrete compressive and flexural strength.

    Note: To become ACI Concrete Laboratory Testing Technician Level I certified you must obtain both the ACI Concrete Strength Testing Technician and the Aggregate Testing Technician Level I certifications.
    Pittsburg State University offers ACI exams and training on a regular basis. Please check for scheduled events and registration information.


    The program requires a working knowledge of the following ASTM test methods and practices:

    • C617/C617M—Capping Cylindrical Concrete Specimens

    • C1231/C1231M—Unbonded Caps for Concrete Cylinders

    • C39/C39M—Compressive Strength of Cylindrical Concrete Specimens

    • C78/C78M—Flexural Strength of Concrete


    ACI will grant certification only to those applicants who meet both of the following requirements:

    1. A passing grade on the ACI written examination, and

    2. Successful completion of the ACI performance examination.

    The one-hour written examination is closed-book and consists of approximately 40 multiple-choice questions. There are at least eight questions on each of the practices and test methods.
    To pass the written examination, both of the following conditions must be met:

    1. At least 60% correct for each of the required practices and test methods, and

    2. A minimum score of 70% overall.

    The performance examination is also closed-book and requires actual demonstration of the required practices and test methods. The examinee is judged on his/her ability to correctly perform all of the required steps for each procedure.

    Recertification is necessary every five years and requires successful completion of both the written and performance examinations.