Aggregate Lab Technician 1 - Jan 8 - 9, 2020

January 08, 2020 8:00 AM to January 09, 2020 5:00 PM

Millennia Professional Services
2600 Warrenville Rd., #203
Downers Grove, IL 60515

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 773-775-7558, or at [email protected], 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-µm (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.