Handling Concrete Specifications

Handling Concrete Specifications, Low Strength Problems and Mixture Submittals

This will be an online course with live and recorded sessions that will be available on-demand.

February 15 – 17, 2022

online registration

REGISTRATION FEE: $295 (Members & Non-Members)


  • Welcome
  • Code and Specifications governing ready mixed concrete (ACI 318, 301, ASTM C94)
  • Mixture Design Submittals – What does the Engineer want? Group Analysis of Typical Mixture Design Submittal
  • Concrete Test Reports: What do they tell me?
  • Specification Revisions for all around benefits.
  • What causes low strength tests and how does it affect my business?
  • Who is responsible for the low break (testing, construction, manufacturing).
  • Using the computer program to analyze concrete strength results.
  • Investigating concrete: When to use NDT, coring, load test, petrography?


Dealing with concrete specifications, troubleshooting low-strength problems and ensuring proper mixture submittals can be expensive and time-consuming. This one-day course will get into the code and specification requirements (ACI 318, 301, ASTM C94) governing ready mixed concrete. It will suggest specification revisions for all around benefits in performance and cost based on a specification guideline document. The guideline document is the result of reviewing numerous concrete specifications (Section 03300) belonging to large owners, and it has been reviewed and supported by the NRMCA Research, Engineering & Standards (RES) Committee.

Troubleshooting low strength problems is perhaps the primary reason for back charges for a concrete company. This could be almost entirely avoided by knowledgeable concrete technical personnel. The course will cover the analysis of strength test results to identify the causes of low-strength problems, including technician competence, and will provide guidance in tracking compliance with specification requirements. Other topics to be discussed include non-destructive testing techniques (such as the Rebound Hammer), core testing, evaluating core test results for acceptance, and the assignment of responsibility.


Producers and contractors who attend this seminar will benefit in their discussions with design professionals. Equipped with in-depth knowledge about improving concrete specifications, they will be able to address performance issues, avoid conflict, and save money. Producers, contractors, engineers and testing labs will learn much from the discussions on investigating low-strength problems, helping them to avoid issues that impact partnering, project cost and schedule. For concrete producers, understanding how to do a proper mixture submittal is an essential skill, and it will be thoroughly covered during this seminar.


  • Print out of the presentations
  • Guide to Improving Concrete Specifications
  • NRMCA/ASCC Pre-Construction Checklist
  • Flowchart of ACI Mixture submittal process
  • Research to Support P2P (Prescriptive to Performance specification)
  • Computer program for analyzing concrete test results
  • NRMCA Publications:
  • No. 133—In-Place Concrete Strength Evaluation
  • A Recomended Practice
  • No. 179—Variables that Influence Measured
  • Concrete Compressive Strength
  • No. 185—Understanding Concrete Core Testing
  • Related Specification in Practice topics and P2P Presentation
  • Selected Publications by Mr. Luke Snell
  • Code and Standards Requirements for Acceptance Testing Presentation with notes and checklist



Architects and engineers will earn 8 Professional Development Hours upon completion of this program. A certificate of completion will be provided to all attendees. This program also fulfills some of the requirements for NRMCA’s STEPS™ Certified Concrete Professional program.


AUGUST 1 - DECEMBER 31, 2021

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