Masonry Laboratory Testing Technician

Definition

A Masonry Laboratory Testing Technician is an individual who has demonstrated the knowledge and ability to perform laboratory procedures required for preparation and testing of masonry construction-related materials, including concrete masonry units, prisms, mortars, and grouts.

Scope and Knowledge

This program requires demonstration of the knowledge and hands-on skills covered in the Job Task Analysis (JTA) for ACI Masonry Laboratory Testing Technician Certification.

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.

ASTM Test Methods & Practices

The program requires a working knowledge of laboratory procedures selected from the following ASTM test methods and practices:

• ASTM C90 – 16a – Loadbearing Concrete Masonry Units
• ASTM C140/C140M – 18a – Sampling and Testing Concrete Masonry Units and Related Units
• ASTM C270 – 19a – Mortar for Unit Masonry
• ASTM C780 – 18a (including Annex) – Preconstruction and Construction Evaluation of Mortars for Plain and Reinforced Unit Masonry
• ASTM C1019 – 18 – Sampling and Testing Grout
• ASTM C1314 – 18 – Compressive Strength of Masonry Prisms

• ASTM C1552 – 16 – Capping Concrete Masonry Units, Related Units, and Masonry Prisms for Compression Testing

Supplemental Resources

Additional resources that may aid in this program include:

• ASTM C39/C39M – 18 – Compressive Strength of Cylindrical Concrete Specimens
• ASTM C109/C109M – 16a – Compressive Strength of Hydraulic Cement Mortars (Using 2-in. or [50-mm] Cube Specimens)

• ASTM C617/C617M – 15 – Capping Cylindrical Concrete Specimens

Certification Requirements

ACI will grant certification only to those applicants who meet both of the following requirements:

• Obtain a passing grade on the ACI written examination; AND

• Successfully complete the ACI performance examination.

Written Examination

• Duration: 1.5 hours
• Type: Open-book
• Format: Approximately 70 multiple-choice questions

• Content: 8 to 12 questions on each ASTM test method and practice

Passing Criteria:

• At least 60% correct for each of the required test methods and practices; AND

• A minimum overall score of 70%.

Performance Examination

• Type: Closed-book

• Requirement: Candidates must successfully demonstrate select field procedures described in ASTM test methods:

• ASTM C140/C140M
• ASTM C780
• ASTM C1019

• ASTM C1552

• The examinee is judged on their ability to correctly perform (or describe, where allowed) required steps for each procedure.

Certification Validity & Recertification

Certification is valid for a period of five years from the date of successfully completing all requirements.

Recertification: Recertification requires successful completion of both the written and performance examinations.