Aggregate Testing Technician—Level 1

2026 Aggregate Level 1 Scheduling Changes:

Shared Sessions
In an effort to maximize our available space and to more efficiently utilize our Supplemental Examiners, all ACI Aggregate Level 1 exam sessions will occur in tandem with Strength exams. 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 of these exams on the same date.

2026 Aggregate Level 1 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 Aggregate Testing Technician—Level 1. 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 AASHTO/ASTM standards:

• AASHTO R 90/ASTM D75—Sampling Aggregates
• AASHTO R 76/ASTM C702/C702M—Reducing Samples of Aggregate to Testing Size
• AASHTO T 11/ASTM C117—Materials Finer Than 75-µm (No. 200) Sieve in Mineral Aggregates by Washing
• AASHTO T 27/ASTM C136—Sieve Analysis of Fine and Coarse Aggregates
• AASHTO T 85/ASTM C127—Specific Gravity and Absorption of Coarse Aggregate
• AASHTO T 84/ASTM C128—Specific Gravity and Absorption of Fine Aggregate
• AASHTO T 255/ASTM C566—Total Moisture Content of Aggregate by Drying
• AASHTO T 21/ASTM C40/C40M—Organic Impurities in Fine Aggregate for Concrete

Certification Requirements:

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 two-hour written examination is open-book and consists of approximately 100 multiple-choice questions. There are 8 to 12 questions on each standard.

To pass the written examination, both of the following conditions must be met:

1. At least 60% correct for each of the required standards, and
2. 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.

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.