The ACI Aggregate Testing Technician (ATT) certification is a vital credential for professionals working in the construction materials industry. This certification, provided by the American Concrete Institute (ACI), ensures that technicians have the necessary skills and knowledge to conduct aggregate testing in compliance with industry standards. Whether you are an experienced technician or entering the field, obtaining an ACI Aggregate Testing Technician certification can significantly enhance your career prospects. Aggregate testing plays a crucial role in the construction process, as aggregates form the foundation of concrete and asphalt materials. Proper testing ensures the quality, durability, and performance of construction materials, making it an essential aspect of infrastructure development.
Prepare for the ATT - ACI Aggregate Testing Technician exam with our free practice test modules. Each quiz covers key topics to help you pass on your first try.
The ACI Aggregate Testing Technician certification is essential for professionals in construction materials testing.
Level 1 and Level 2 certifications validate skills in performing standardized aggregate tests.
Certified technicians play a critical role in ensuring quality control and compliance with ASTM and AASHTO standards.
Study guides, training courses, and hands-on experience are key to passing the ACI certification exam.
ACI certifications are valid for five years and require recertification to stay up-to-date.
The ACI Aggregate Testing Technician certification is designed for professionals who perform tests on fine and coarse aggregates in accordance with ASTM and AASHTO standards. The certification is divided into two primary levels: Level 1 and Level 2, each with distinct requirements and competencies.
Enhances technical skills and industry knowledge.
Provides career advancement opportunities in the construction and materials testing industry.
Ensures compliance with ASTM and AASHTO standards for aggregate testing.
Demonstrates professional credibility and competency.
Contributes to quality control in construction projects.
An ACI Aggregate Testing Technician (ATT) is a certified professional responsible for performing standardized tests on aggregates used in concrete and asphalt production. These tests help determine aggregate properties such as gradation, specific gravity, absorption, and resistance to degradation.
Sampling and testing aggregates according to industry standards.
Measuring physical and mechanical properties of fine and coarse aggregates.
Ensuring quality control in material production and construction projects.
Following ASTM and AASHTO testing procedures to maintain consistency.
Documenting and reporting test results to engineers and project managers.
With the growing emphasis on infrastructure quality and sustainability, ACI-certified technicians are in high demand across various sectors.
ACI Aggregate Testing Technician - Level 1
The Level 1 certification focuses on fundamental aggregate testing procedures. To obtain this certification, candidates must demonstrate proficiency in the following tests:
Sampling Aggregates (ASTM C702/AASHTO T2)
Sieve Analysis of Fine and Coarse Aggregates (ASTM C136/AASHTO T27)
Specific Gravity and Absorption of Coarse Aggregates (ASTM C127/AASHTO T85)
Specific Gravity and Absorption of Fine Aggregates (ASTM C128/AASHTO T84)
Moisture Content of Aggregates (ASTM C566/AASHTO T255)
Materials Finer than No. 200 Sieve (ASTM C117/AASHTO T11)
The Level 2 certification builds upon Level 1 and includes additional testing methods such as:
Resistance to Degradation by Los Angeles Abrasion (ASTM C131 & C535/AASHTO T96)
Unit Weight and Voids in Aggregate (ASTM C29/AASHTO T19)
Sand Equivalent Test (ASTM D2419/AASHTO T176)
Each certification level requires passing a written and performance-based examination administered by ACI-approved testing centers.
To successfully obtain ACI Aggregate Testing Technician Level 1 certification, candidates should prepare thoroughly using study guides and training resources. Here are some essential study tips:
ACI Certification Study Guides (available through the ACI website)
ASTM and AASHTO Testing Standards
Practice Exams and Sample Questions
Hands-on Laboratory Training and Workshops
ACI Technical Documents and Field Testing Manuals
Understand Testing Procedures – Familiarize yourself with ASTM and AASHTO standard testing methods.
Practice Hands-on Testing – Gain experience by working in a materials testing lab.
Take Practice Tests – Review sample questions to assess your knowledge.
Attend ACI Training Sessions – Participate in training courses offered by ACI-accredited institutions.
Review Common Testing Errors – Learn from mistakes commonly made during aggregate testing.
By utilizing these study resources and techniques, candidates can increase their chances of passing the ACI certification exam.
ACI certifications, including the ACI Aggregate Testing Technician certification, are valid for a period of five years. After this period, technicians must renew their certification by retaking the written and performance examinations.
Schedule Recertification Exams – Contact an ACI-approved testing center to register for renewal exams.
Update Knowledge on Testing Standards – Review any changes in ASTM and AASHTO testing procedures.
Participate in Refresher Training – Attend workshops to reinforce technical skills.
Complete Performance Evaluations – Demonstrate competency in practical testing methods.
Maintaining certification ensures that technicians stay current with industry standards and continue delivering accurate test results.