EP #126: What the “State-of-the-Art” PLC Report Quietly Admitted About Concrete Performance

In this episode of the Concrete Logic Podcast, Seth Tandett breaks down the 2010 “State-of-the-Art Report on Use of Limestone in Cements” that helped launch Portland Limestone Cement (PLC) into the U.S. market. You’ll hear what the report got right, what it left out, and why Europe’s cement playbook may not fit American concrete. If you're in the industry, this episode will help you question the assumptions behind the biggest cement shift in decades. Takeaways  What happens to concrete strength when limestone content isn't properly optimized? Could higher limestone levels reduce your mix's sulfate resistance? How does increased limestone affect carbonation depth and long-term durability? Is PLC more likely to cause long-term shrinkage or expansion issues? Why are curing practices in Europe so different—and does it matter? How critical is mix design when using PLC instead of traditional cement? Are we relying on research we haven’t actually read or fully understood? Chapters 01:57 Exploring the 2011 State of the Art Report 04:25 Positive Aspects of Portland Limestone Cement 05:49 Cautions and Concerns with PLC 13:25 Comparative Analysis: Europe vs. US Practices 19:20 Conclusion and Importance of Research ============================= Take Your Knowledge Further – Join Concrete Logic Academy! Gain access to expert video lessons, live Q&As, and professional development hours (PDHs). Learn what textbooks won’t teach you. Start Learning: https://www.concretelogicacademy.com Support the Podcast – Be Part of the Concrete Revolution! Help us keep the Concrete Logic Podcast going strong. Your donation helps the entire concrete community get better and smarter. Donate here: https://www.concretelogicpodcast.com Want your company to sponsor the podcast? Learn how: https://www.concretelogicpodcast.com/p/partner-with-concrete-logic-podcast/ Producer: Jodi Tandett Music by: Mike Dunton (Instagram: @Mike_Dunton) Stay Connected & Watch More! Host: Seth Tandett Email: [email protected] LinkedIn: https://www.linkedin.com/in/seth-tandett/ YouTube: https://www.youtube.com/@concretelogicpodcast Website: https://www.concretelogicpodcast.com LIKE, SUBSCRIBE, COMMENT & SHARE for more concrete truth bombs.