Certification Programs

Aggregate Testing Technician—Level 1

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.

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.

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Study Material:
Go to the ACI Bookstore on this website to order and/or obtain current pricing on any items listed below:

CP-44, 8th Ed. Technician Workbook for ACI Certification of Aggregate Testing Technician—Level 1

This workbook contains information about the ACI Aggregate Testing Technician—Level 1 (ATT1) certification program, performance checklists, and reprints of all of the resource materials referenced by the certification examinations.

An errata has been issued for the first and second printings and can be found here.