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Webinar — Topping Slabs: Aren’t They All the Same?

May 28, 1:00 pm - 2:00 pm CDT

ICRI Webinar, May 28, 2024, 1-2pm, Topping Slabs: Aren't They All the Same?



Program Description

Bonded and unbonded topping slabs may seem similar, but their behaviors are fundamentally different and they required different design and construction. Failure to appreciate the differences can result in cracking, debonding, and performance issues. This session will explore the differences between the two, discuss materials- and installation-related causes of failures, and provide guidelines to properly implement each type of topping slab.


Learning Objectives

Through attending this program, registrants will understand the following concepts and be able to apply them to their professional practice:

  1. Explain the different behaviors of bonded and unbonded toppings and how they are different.
  2. Understand how to design and construct the two types of topping slabs.
  3. Identify, understand, and recognize common causes of failures.
  4. Select materials and proportions to enhance the likelihood of successful topping installation.
  5. Describe proper techniques to successfully install overlays and toppings.






Matthew Sherman

Matthew Sherman

Simpson Gumpertz & Heger, Inc.

Matthew Sherman, PE, is a Senior Principal with Simpson Gumpertz & Heger, Inc. of Waltham, Massachusetts and is a registered Professional Engineer in multiple states and a Fellow of the American Concrete Institute and the International Concrete Repair Institute. Mr. Sherman received his B.S. in Civil Engineering from Cornell University in 1991 and his M.S. in Civil Engineering (Structural) from The University of Texas at Austin in 1993. Matthew has over 25 years of experience in consulting and heavy construction throughout the United States. His specialties include concrete materials, bonded toppings, thermal and durability simulation, non-destructive testing, corrosion mitigation, and concrete repair.


Continuing Education

Through participating in this webinar, attendees are eligible to receive the following continuing education units:

  • 1.0 Professional Development Hours (PDH)
  • 1.0 American Institute of Architects Learning Units (AIA LU)

For questions regarding your continuing education credits, please contact ICRI’s Director of Professional Development Operations, Danial Davis, at [email protected].


Disclaimer: the ideas expressed in this ICRI-hosted webinar are those of the speaker(s) and do not necessarily reflect the views and opinions of ICRI, its board, committees, or sponsors.




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