Concrete Strength Testing Technician

2026 Strength Scheduling Changes:

Shared Sessions
In an effort to maximize our available space and to more efficiently utilize our Supplemental Examiners, all ACI Strength exam sessions will occur in tandem with another exam. The listed capacity for these dates is the total capacity for the day which will be shared across both exams. Examinees CANNOT register for more than one exam on the same date.

2026 Strength Exam Dates [Not Yet Open for Registration]:

PLEASE NOTE: While we do aim to open registrations at the start of the day they’re scheduled to be opened, there may be times where this isn’t possible and registration won’t open until later in the day. This is most likely to happen when the date falls on a Monday or immediately after a Holiday or large CRMCA event. We appreciate your patience and understanding when these situations arise.

*This is the anticipated schedule for 2026. Dates and locations are not expected to change, but may be adjusted if needed.*

Scope and Knowledge:

This program requires demonstration of the knowledge and hands-on skills covered on the Job Task Analysis (JTA): JTA for ACI Certification of Concrete Strength Testing Technician. The JTA is a detailed list of specific points of knowledge and skills that may be included in the examinations for this ACI Certification program. ACI urges candidates to use the JTA to prepare for the certification exams. The program requires a working knowledge of the following ASTM practices and test methods:

• C617/C617M – 15—Capping Cylindrical Concrete Specimens
• C1231/C1231M – 15—Unbonded Caps for Concrete Cylinders
• C39/C39M – 18—Compressive Strength of Cylindrical Concrete Specimens
• C78/C78M – 18—Flexural Strength of Concrete

Certification Requirements:

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

• A passing grade on the ACI written examination, and
• 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:

• At least 60% correct for each of the required practices and test methods, and
• 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. Certification is valid for a period of five years from the date of successfully completing all requirements. Recertification requires successful completion of both the written and performance examinations.