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Aggregate Testing Technician


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An Aggregate Testing Technician - Level 1 is an individual who has demonstrated the knowledge and ability to properly perform, record, and report the results of basic field and laboratory procedures for aggregates.

For more information, please contact the Illinois Chapter Office at 847-635-1390, or at RegisterACI-IL@concretece.com, and one of our chapter members will assist you.

T2 / D75 Sampling Aggregates T248 / C702 Reducing Samples of Aggregate to Testing Size T11 / C117 Materials Finer Than 75-┬Ám (No. 200) Sieve in Mineral Aggregates by Washing T27 / C136 Sieve Analysis of Fine and Coarse Aggregates T85 / C127 Specific Gravity and Absorption of Coarse Aggregate T84 / C128 Specific Gravity and Absorption of Fine Aggregate T255 / C566 Total Moisture Content of Aggregate by Drying T21 / C40 Organic Impurities in Fine Aggregate for Concrete

ACI will grant certification only to those applicants who meet both criteria:

A passing grade on the Written Examination; and Successful completion of the ACI Performance Examination

The two-hour written examination is "open book" and consists of approximately 100 multiple choice questions. There are 8 to 12 questions on each of the Standards. To pass the written examination, both of the following conditions must be met: (a) at least 60% correct for each of the required standards; and (b) a minimum score of 70% overall.

The performance examination is "closed book" and requires actual demonstration of the required Standards. The examinee is judged on his/her ability to correctly perform or describe all of the required procedures for each standard.

Recertification is necessary every five (5) years, and requires successful completion of both the written and performance examinations.

Frequently Asked Questions

1. How do I register?

You can register online and complete the registration form and email or fax it in

2. What forms of payment do you accept?

You can pay your registration fees with a check, money order, Visa, Discover or MasterCard.

3. How and when do I get my study guide?

You will receive your study guide the first day of class. It can be mailed to you in advance at an additional cost of $18.95.

4. Where do the testing and review sessions take place?

The testing and review sessions are at the location noted on the schedule.

5. What is your cancellation policy?

The latest you can cancel your registration for a full refund is 5 business days prior to the start of class. Cancellations less than 5 days forfeits your registration fee.

6. Do I have to attend the procedure review session?

No, the review session is optional, however we strongly recommend it for all first-time certification attendees. It could be optional for those renewing their certification. If you need additional clarification, please contact us at 847-635-1390 or RegisterACI-IL@concretece.com and someone will assist you.

7. What time do classes start?

All sessions will start at 8:00 am unless otherwise noted. Please plan to arrive at least 15 minutes early to allow for check-in.

8. What do I need to bring with me to class?

Calculator (Cellphones NOT Allowed), pencil, highlighter, safety shoes, safety glasses, and ACI study guide if you received it in advance.

9. When will I receive test results?

Results will be sent to you by ACI national via U.S. mail within 2 to 4 weeks from test date. Do not contact us about availability of your test results. The Illinois Chapter does not grade the exams.

10. What if I fail the written exam?

Click here for information.

11. What if I fail the performance exam?

You will need to re-register with us to take it again. You can register online and complete the registration form and email or fax it in.