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Steps to Reduce Unwanted Cracking in Concrete |
Presented by:
Jason Weiss, Purdue
(BIO)
Time: 11:30
am EST │
1.5 hours duration
Pricing: $50
(Members & Non-Members)
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register online: Click
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Instructions for webinar participation will be provided by
GoToWebinars.com, not NRMCA. Please add them to your
contacts in order to ensure proper delivery. Login
instructions
will be sent within two business days of registration.
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System
Requirements
PC-Based Attendees │
REQUIRED: Windows® 2000, XP Home, XP Pro, 2003 Server.
Macintosh®-Based Attendees
│ REQUIRED: Mac OS® X 10.3.9 (Panther®) or newer.
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Webinar Description:
There is an age old adage that states that
there are two types of concrete: Concrete that has cracked and concrete that
will crack. Unfortunately this is all too true in much of the concrete that
is placed. This webinar is designed to help design and place concrete that
has a reduced potential for cracking.
The discussion will begin by outlining the fundamentals aspects of early-age
concrete. Specifically discussions will focus around how the material
behaves before and after setting. Concepts of plastic shrinkage cracking,
shrinkage cracking and thermal cracking will be discussed. Further, the
concepts associated with autogenous, drying and thermal shrinkage will be
discussed. The presentation will provide simple rules of thumb that can
reduce cracking. In addition, simulations will be shown that illustrate the
influence of good and bad construction operations on the cracking
performance.
Crack mitigation will be discussed from the perspective of the conditions
that the material is placed in, the mixture proportions that are used, and
new additives (SRA, internal curing).
This Webinar aims at providing attendees with an understanding of some of
the common causes of cracking but more importantly it discusses strategies
to minimize the potential for cracking.
Presenter Bio:
Jason
Weiss is Professor of Civil Engineering at Purdue University in West
Lafayette Indiana. Jason is also the Associate Director of the Center for
Advanced Cement Based Materials and the Director of the Pankow Materials
Laboratory at Purdue. Jason earned a BAE from Penn State University and an
MS and PhD in Civil Engineering from Northwestern University.
Jason is well known for his work on crack prediction, detection and
mitigation. Jason’s research group has focused on the development of test
methods and models to assess a materials susceptibility to cracking. He has
used these models to optimize construction operations like timing of sawcuts.
He has substantial experience with shrinkage reducing admixtures and
internal curing.
He has received TRB’s Mather and Brugraff Best Paper Awards, ACI’s Wason
Medal for Materials Research, and RILEMS L’Hermite Medal. He has also
received eight awards while at Purdue for teaching excellence. He is an
associate editor of the American Society of Civil Engineers (ASCE) journal
of civil engineering materials, is an associate editor of RILEM’s Materials
and structures Journal. He is currently the Chair of the Transportation
Research Boards Committee on Concrete Materials and Placement. Further
details on his background and publications are available
HERE.
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Association, 2010
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