Concrete Strength Testing Technician


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.

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. 


Certification/Recertification $650  
For those individuals certifying for the first time or those who are recertifying. Fee includes workbook, written exam, and performance exam. (Workbook will be mailed upon request.)
Written Exam Only $450  

For those individuals who failed their written exam on their first testing attempt.  Fee includes review session and written exam. (Workbook not included.)

Performance Exam Only $500  

For those individuals who failed their performance exam on their first testing attempt.  Fee includes review session and performance exam. (Workbook not included.)


Written/Performance Exams

Saturday: TBD - Prior to the exam date, you will receive an email regarding your scheduled time, as class size restrictions are currently in place.


Individuals requesting special accommodations enabling them to participate in ACI certification examinations must submit a letter from their primary physician to the Central Texas Chapter ACI describing the physical challenge and providing a proposed solution (i.e. more time, a reader for the questions, physical assistance, etc.).  The Central Texas Chapter ACI will forward the request and physician’s letter to ACI National for direction.  Since the notification and formulation of appropriate accommodations takes time, candidates must make their request and submit the physician letter to the Central Texas Chapter ACI at least three weeks prior to a certification examination session to formulate appropriate accommodations, arrange for their availability at the session, and accept the registration.


All refunds requested prior to 2 weeks before the exam date will be subject to a $100 handling fee. No refund will be granted and no request to move to another exam date will be accepted within 2 weeks of the exam date.


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.

Job-task analysis (JTA) for ACI Certification of Concrete Strength Testing Technician