Abstract

Concrete petrography is an important tool for quality assurance. In this webinar we use case studies to illustrate how we determine if the mixture in place matches the concrete mix design. This information is often pivotal for putting jobs that have issues such as low strength, early age cracking, surface defects and more back on track. DRP routinely uses innovative approaches with fluorescence microscopy and other methods to de-convolute the w/cm and other parts of concrete mixtures. See how these methods work through case studies that range from strength issues in pier columns to developing mix designs with new supplemental cementitious materials.

David Rothstein, Ph.D., P.G., FACI

David has more than twenty-five years of professional experience in petrographic analysis. He has performed more than 2,000 petrographic investigations on more than 10,000 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, CO.