The development of early age cracking and the primary contributing factors will be discussed, including:
- plastic shrinkage
- autogenous shrinkage
- 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.
- Develop an understanding of the types of early age concrete cracking and associated cracking patterns
- Learn about the causes of early age cracking patterns
- 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.
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).