Aggregate Base Testing Technician—AASHTO Methods

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Aggregate Base Testing Technician—AASHTO Methods


Definition:

An Aggregate Base Testing Technician—AASHTO Methods 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 using AASHTO standards.


Scope and Knowledge:

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

JTA for ACI Aggregate Base Testing Technician Certification

The JTA is a detailed list of specific points of knowledge 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 and/or ASTM standards:

  • AASHTO R 90-18—Standard Practice for Sampling Aggregate Products
  • AASHTO R 76-23—Standard Practice for Reducing Samples of Aggregate to Testing Size
  • AASHTO R 58-22—Standard Practice for Dry Preparation of Disturbed Soil and Soil-Aggregate Samples for Test
  • AASHTO T 89-22—Standard Method of Test for Determining the Liquid Limit of Soils
  • AASHTO T 90-22—Standard Method of Test for Determining the Plastic Limit and Plasticity Index of Soils
  • AASHTO T 88-22—Standard Method of Test for Particle Size Analysis of Soils
  • AASHTO T 265-22—Standard Method of Test for Laboratory Determination of Moisture Content of Soils
  • AASHTO T 180-22—Standard Method of Test for Moisture-Density Relations of Soils Using a 4.54-kg (10-lb) Rammer and a 457-mm (18-in.) Drop
  • AASHTO T 99-22—Standard Method of Test for Moisture-Density Relations of Soils Using a 2.5-kg (5.5-lb) Rammer and a 305-mm (12-in.) Drop


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 75 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:

  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.


Find a Testing Location Near You:


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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–47, 1st Ed. Technician Workbook for ACI Certification of Aggregate Base Testing Technician—AASHTO Methods Coming Soon

This comprehensive workbook contains all the information needed to prepare for the exams, including: program information and instructional material, JTA, standard reprints, study questions, and sample checklists.