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Introducing ConcreteTech, a brand new video training series covering important concrete technical matters, presented by veteran industry technical expert and acclaimed instructor Gary Mullings.Gary is noted for his depth of knowledge and warmth of delivery. Designed to be presented as a part of formal or informal training programs, this series will inform viewers on technical issues and procedures for testing ready mixed concrete. Look for upcoming videos which will include discussions on Sampling, Slump Procedures, Testing Concrete for Air Content, Testing High Strength Concrete, Temperature, and many more.

Quality Assurance Testing Series
 

Volume #1

Preparation of 4"x8" Compression Test Specimens

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4"x8" compressive strength specimens are allowed by ASTM C31. They are faster and easier to prepare, and result in easier-to-handle eight pound cylinders (as compared to the 30 pound cylinders produced by 6"x12" specimens). And research shows that the 4"x8" specimens produce virtually the same test results.

This information-packed, easy-to-follow 14-minute video, details the steps and procedures that an ACI Grade I Field Testing Technicians (or equivalent) should follow in preparing 4"x8" compressive strength specimens in accordance with ASTM C31, including:

• Sampling: Selecting a composite sample in accordance with ASTM C172

• Molding: Proper molding, including consolidating by rodding or vibrating

• Curing: Steps for both initial and final curing

• Identifying and Reporting: Recording accurate testing information

Proper preparation of compression testing specimens is a vitally important part of a comprehensive quality assurance testing program. Make sure your field testing technicians have the support they need to do produce accurate results. Order this video today.

Order now in three convenient formats: NRMCA Members: $35. Non-Members: $140
Online Purchases8DVD.8VHS8Computer CD8 Purchase by Fax  (PDF)
8Phone/Email Orders/ Info: Jacques Jenkins, 888-846-7622,  x1165, jjenkins@nrmca.org

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Gary Mullings, NRMCA Senior Director of Operations & Compliance, is a Certified Concrete Technologist with 32 years of service to National Ready Mixed Concrete Association. Gary serves as chairman of the Concrete Density Task Group for American Standards of Testing Materials (ASTM) and is a member of Committee C-9 on concrete. He is also an active member of the American Concrete Institute, the National Safety Council, and the American Trucking Association’s Maintenance Council. Gary is a principal instructor for the NRMCA Short Course on Concrete and Aggregates, the Environmental Course, the NRMCA Safety Course, Plant Manager Certification Course and NRMCA’s Dispatcher Training Course, and has provided instruction for thousands of students during his career. You can reach him at 240/485-1161 or via email at gmullings@nrmca.org.