What if the answer to today’s concrete durability and sustainability challenges isn’t new—but something we left behind decades ago? In Episode #129 of the Concrete Logic Podcast, host Seth Tandett talks with Joseph E. Thomas, Executive Director of the Natural Pozzolan Association, about a material used in the Hoover Dam and Roman aqueducts: natural pozzolans. Joseph explains how these natural pozzolans are making a quiet comeback and why they may deserve another look. What You'll Learn: - What exactly are natural pozzolans, and how do they compare to fly ash? - Can natural pozzolans genuinely enhance concrete durability? - Why have iconic structures like the Pantheon and Hoover Dam relied on natural pozzolans? - What are the realistic limitations, such as water demand and regional availability? - How natural pozzolans stack up against traditional cement and fly ash. - Emerging trends and the growing role of activated pozzolans in construction. Chapters: 00:00 - Intro 02:15 - Understanding Natural Pozzolans 07:30 - Historical Examples & Real-World Performance 14:05 - Benefits vs. Limitations in Today's Market 20:20 - Challenges: Water Demand & Availability 27:50 - Where Natural Pozzolans Fit in Future Projects 33:15 - Summary & Closing Thoughts ============================= 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/donate Want your company to sponsor the podcast? Learn how: https://www.concretelogicpodcast.com/p/partner-with-concrete-logic-podcast/ Guest Information: Joseph E. Thomas Executive Director, Natural Pozzolan Association Website: https://www.naturalpozzolan.org Email:
[email protected] Producer: Jodi Tandett Music by: Mike Dunton (Instagram: @Mike_Dunton) Stay Connected & Watch More! Host: Seth Tandett Email:
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