New Ways of Looking at Delaminations and Other Surface Defects

March 17, 2021
11:30 AM - 1:00 PM
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Zoom Meeting


About the Topic

The repair and remediation of delaminations, blisters and other surface defects can set projects back considerably in terms of time and money. Although documenting the areal distribution and depth of these defects in concrete is often relatively straightforward; a good understanding of the factors that contribute to the problem is often more obscure. In many cases, it is not just that finishing was mis-timed, and petrographic investigation is often an effective tool to develop an understanding of material properties that may also contribute to the problem. In this presentation we describe new techniques such as fluorescence microscopy and image analysis that allow us to document quantitatively different aspects of surface defects and re-visit tried and true techniques that help us understand the causes of surface defects.

About the Speaker

David Rothstein, Ph.D., P.G., FACI, has more than twenty-five years of professional experience in petrographic analysis. He has performed more than 1,400 petrographic investigations on more than 8,000 samples of construction materials from projects throughout the world. David is a professional geologist and an active member of ACI and ASTM where he serves as a voting member on committees involved with concrete durability, petrography, aggregates and chemical reactions. He is the President of DRP, A Twining Company in Boulder, Colorado.

Webinar Link

The link to this webinar will be emailed to each registered attendee on March 16, 2021.

The Deadline to Register for this presentation is March 15, 2021.


$10.00 Members

$20.00 Non-Members