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, including the new ACI Building
Code 318-08 exposure categories. 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.
WHO SHOULD ATTEND?
contractors who attend this seminar will benefit in their discussions
with design professionals. Equipped with in-depth knowledge about improving
concrete specifications, they will better 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.
WHAT YOU WILL LEARN
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
Another part of this course provides the necessary details required for an
efficient concrete mixture submittal following the ACI 318 flowchart for
Selection of Concrete Mixtures. Analysis of a typical mixture submittal will
be conducted as a group exercise.
Print out of the
Guide to Improving Concrete
Flowchart of ACI Mixture
Research to Support P2P
(Prescriptive to Performance specification)
Computer program for
analyzing concrete test results
- No. 133—In-Place
Concrete Strength Evaluation
A Recomended Practice
- No. 179—Variables
that Influence Measured
- 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
Group Analysis of Typical Mixture Design Submittal
10:30 am: Break
10:45 am: Specification revisions for all around benefits.
12:00 pm: Lunch
1:00 pm: Concrete Test Reports
What do they
1:45 pm: What causes low strength tests and how does it affect my
2:30 pm: Break
2:45 pm: Who is responsible for the low break (testing, construction,
3:30 pm: Using the computer program to analyze concrete strength
3:45 pm: Investigating concrete
When to use
NDT, coring, load test, petrography?
Luke M. Snell, P.E., FACI, FASCE,
is a Concrete Consultant Concrete and an Emeritus Professor of Construction from Southern Illinois University Edwardsville.
He has done extensive consulting work on construction and concrete problems throughout the U.S. and internationally.
He has also written over 400 articles on concrete, construction materials, and construction education.
He has been instrumental in starting concrete certification programs in China, India, Taiwan, Mongolia and Saudi Arabia.
He is the past chair of several ACI committees including the ACI 120 History of Concrete, The Educational Activities Committee and the Chapter Activities Committee.
Snell is an ACI Fellow and has received numerous awards and was named one of the Ten Most Influential People of the Year in the Concrete Industry by
Concrete Construction and Concrete Producer magazines (2007), Construction Laureate of Mongolia (2007), the Henry L Kennedy Award from ACI (2008), a
Honorary Doctorate from Aria University of Sciences and Sustainability (2011) and the ACI Certification Award (2015). He is a licensed Professional Engineer in Missouri and Illinois.
Ph.D., P.E., FACI, is Vice President, Technical Services at NRMCA. With over 25 years of experience in concrete technology, he is responsible for NRMCA’s concrete producer quality initiatives as well as various educational and technical programs. He supports NRMCA’s P2P initiative and directs the activities of the NRMCA Research Laboratory. A fellow of ACI and a winner of ACI’s Young Professional Achievement Award and ASTM Award of Appreciation from the Sustainability and Concrete Committees, Dr. Obla is an active member of various ACI, ASTM, and TRB technical committees. He has served as chair for ASTM 09.49—Pervious Concrete, and ACI 232—Fly Ash and Natural Pozzolans. He has published a book on concrete quality and a chapter in a book on concrete sustainability and has over 80 technical articles and reports. He holds a B. Tech in civil engineering from IIT (BHU) Varanasi, India and a M.S. and Ph.D. from the University of Michigan, Ann Arbor. He is a licensed professional engineer in the state of Maryland and has served as vice-president and president for the ACI San Antonio Chapter.
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
Certified Concrete Professional program.
(Members & Non-Members)
For more information, contact
Meghan Callahan, 240-485-1135, NRMCA meetings