July 30, 2020 - 12:00pm to 1:00pm

The development of early age cracking and the primary contributing factors will be discussed, including:

  • plastic shrinkage
  • autogenous shrinkage
  • subsidence
  • thermal effects

The typical cracking patterns associated with these early age crack will also be presented.

A case study will be presented where early age transverse cracking developed in numerous western Montana bridge decks. Within the first few years of service, the cracking progressed to cause full depth holes (penetrations) in two of the decks. A brief overview of project will be presented: including field investigation, laboratory studies, and finite element modeling analyses.

Learning Objectives

  1. Develop an understanding of the types of early age concrete cracking and associated cracking patterns
  2. Learn about the causes of early age cracking patterns
  3. Discover how early age cracking can be diagnosed and prevented by reviewing a case study

1 CE hour will be awarded. Certificates will be emailed within a week of this webinar.

Registration

Members - $25
Non-members -  $50

Register by July 28th at 11:59 pm CST to reserve your space​

About the Speaker


Todd Nelson, Associate Principal
Wiss, Janney, Elstner Associates, Inc.

Mr. Nelson has been with Wiss, Janney, Elstner Associates, Inc. (WJE) since 2000 and has more than twenty years of experience in the concrete industry. Mr. Nelson is an Associate Principal at WJE, which includes responsibilities as a project manager, project advisor, and mentor. His project management experience includes a wide variety of concrete forensic investigations, laboratory evaluations, applied research and repair projects. Concrete repair and forensic projects include a wide variety of concrete infrastructure including bridge decks, pavements, water structures, nuclear plants, parking garages, and slabs-on-ground. Mr. Nelson promotes and utilizes many field investigation techniques (such as non-destructive testing, hands-on distress mapping, physical measurements, and sample procurement), laboratory evaluations (such as concrete petrography, chemistry, and physical testing) and analytical tools for concrete forensic investigations and repair projects. Mr. Nelson also has a strong background in evaluation of concrete materials for durability, physical properties, and high performance characteristics (low permeability, durability, high strength, acid attack, ultra-high performance concrete - UHPC, self-consolidating concrete -and SCC).

1

Participants

Matthew Shelton ( H.W. Lochner, Inc. )
Nancy Radler ( SEAOI )
Stephanie Crain ( SEAOI )
Mary Jane Davis ( SEAOI )
Sophie Hui Liu ( ESCA Consultants, Inc. )
James Pawlikowski
Benjamin Sexton ( Thornton Tomasetti )
Dennis Penepacker
Harish Virmani ( Harish C. Virmani Structural Engineer Consulting, Inc. )
Donald Hamlin ( Thornton Tomasetti, Inc. )
HAIDER HIMAIRI ( Thornton Tomasetti )
Brian Spencer ( Architechnics, Inc. )
Steven Megginson ( Hampton Lenzini & Renwick )
John Owen ( Owen Engineering LLC )
Michael Schmidt ( Spancrete )
Pinit Wichaimethawee ( MWRDGC )
Rachel Jackson ( Thornton Tomasetti, Inc. )
John Grendzinski ( Landmark Structures )
Jeffie Chang ( WSP )
Daniel Allen ( Allen Engineering Corporation )
Seth Hoffman ( Brierley Associates )
Praaveenyan Vangara ( Willett Hofmann & Associates, Inc. )
Peter Pascua ( Willett, Hofmann & Associates, Inc. )
Edward Gapatan ( Willett, Hofmann & Associates, Inc. )
Adam Kueny ( Willett Hofmann & Associates, Inc. )
Brian Converse ( Willett, Hofmann & Associates, Inc. )
Michael Leslie ( Willett, Hofmann & Associates, Inc. )
Jordan Primus ( Willett Hofmann & Associates, Inc. )
Michael Wagner ( Willett, Hofmann & Associates, Inc. )
Ian Nilausen ( Willett, Hofmann & Associates, Inc. )
Erik Larson ( Willett, Hofmann & Associates, Inc. )
Satyam Mandloi ( Willett Hofmann & Associates )
Rami Asfahani ( Ciorba Group )
David Holdener ( Thouvenot, Wade & Moerchen, Inc. )
Bruce Schopp ( Oates Associates )
Jason Dreyer ( Oates Associates )
Moshe Calamaro ( Moshe Calamaro & Associates )
Charles Giovannetti ( Moshe Calamaro & Associates )
Jared D'Amico ( K2N Crest )
John Lewis ( John O. Lewis and Company )