Aggregate Soils Base Testing Technician


An Aggregate Soils Base Testing Technician 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 and soils.


Training Registration Fee Member: $385 Non Member: $460

Includes all four nights of classroom/laboratory training.

Certification/Recertification Fee Member: $420 Non Member: $475

For those individuals certifying for the first time or recertifying. Fee includes ACI study guide, written and performance exams.  (Fee does not include training session.)

Written/Performance Exam Only Member: $205 Non-Member: $260

For those individuals who failed their written or performance exam on their first testing attempt.  Fee includes written or performance exam. (no study guide)



Monday 5:30 p.m. - 8:30 p.m.
Classroom/Laboratory Training  

Tuesday 5:30 p.m. - 8:30 p.m.
Classroom/Laboratory Training

Wednesday 5:30 p.m. - 8:30 p.m.
Classroom/Laboratory Training

Thursday 5:30 p.m. - 8:30 p.m.
Classroom/Laboratory Training


Friday 5:30 p.m. - 7:30 p.m.
Classroom Review

Saturday 7:00 a.m. - 1:00 p.m.
Written/Performance Exams

*Times and days are subject to change without notice.
There is absolutely no photography, audio or video recording allowed at the training, review, or testing sessions.


Individuals requesting special accommodations enabling them to participate in ACI certification examinations must submit a letter from their primary physician to the Las Vegas Chapter ACI describing the physical challenge and providing a proposed solution (i.e. more time, a reader for the questions, physical assistance, etc.).  The Las Vegas Chapter ACI will forward the request and physician’s letter to ACI for direction.  Since the notification and formulation of appropriate accommodations takes time, candidates must make their request and submit the physician letter to the Las Vegas Chapter ACI at least three weeks prior to a certification examination session to formulate appropriate accommodations, arrange for their availability at the session, and accept the registration.


Participant can cancel registration by emailing a request to [email protected] five (5) business days prior to a certification training/testing/seminar/or chapter event to receive a refund of the registration fee less a $125.00 cancellation fee. Substitutions may be made at any time prior to the event by emailing [email protected]


This program requires demonstration of the knowledge and hands-on skills covered on the Job Task Analysis (JTA):

JTA for ACI Aggregate Base Testing Technician Certification

The program requires a working knowledge of the following ASTM test methods and practices:

  • T2/D75—Sampling Aggregates

  • T248/C702—Reducing Samples of Aggregate to Testing Size

  • R58/D421*—Dry Preparation of Disturbed Soil and Soil-Aggregate Samples for Test

  • T89/D4318—Determining the Liquid Limits of Soils

  • T90/D4318—Determining the Plastic Limit and Plasticity Index of Soils

  • T88/D422—Particle Size Analysis of Soils

  • T265/D2216—Laboratory Determination of Moisture Content of Soils

  • T180/D1557—Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop

  • T99/D698—Moisture-Density Relations of Soils Using a 2.5-kg (5.5-lb) Rammer and a 305-mm (12-in.) Drop


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 eight to 12 questions on each of the standards. 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.

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