PRESENTED BY: CONCRETE LOGIC ACADEMY Practical education and ongoing development for concrete professionals at every stage of their career.  Join here: https://www.concretelogicacademy.com/EPISODE SUMMARYThirty years ago, concrete mix designs were simpler, more prescriptive, and easier to predict.Today, they’re optimized, blended, engineered, and heavily influenced by admixtures, SCMs, and cement chemistry.In this episode, Seth talks with Jeff Slagle from Chaney Enterprises about how ready-mix designs actually evolved over the last three decades—what changed, why it changed, and what that means for producers, engineers, and finishers working with today’s concrete.WHAT YOU’LL LEARNWhat ready-mix designs actually looked like in the 1990s (and why they were so prescriptive)Why SCMs like slag and fly ash were initially resisted—and how producers got buy-inHow high-range water reducers quietly changed everythingWhy performance-based specs (P2P) shifted control back to producersWhat Type IL cement changed in real-world placement and finishingWhy data centers are driving new mix demandsWhat problems the next generation of concrete still hasn’t solvedCHAPTERS00:00 – Why this episode matters 03:20 – Jeff Slagle’s path through the ready-mix business 06:10 – What mix designs looked like 30 years ago 09:50 – When SCMs actually entered the Mid-Atlantic market 11:30 – Slag vs fly ash: field realities, not theory 14:45 – Prescriptive specs vs performance-based design (P2P) 17:00 – High-range water reducers and the air-entrainment nightmare 19:30 – Aggregate blending and plant complexity 20:30 – Type IL cement and the end of “cheap” SCMs 23:40 – Finishing challenges and jobsite adaptation 26:30 – What the future might look like for concrete mixes 29:00 – Cement supply, imports, and market pressureGUEST INFOJeff Slagle Director of Key Aggregate Accounts Chaney Enterprises Email: JSlagle@chaneyenterprises.com Website: https://www.chaneyenterprises.com CONCRETE LOGIC PARTNERSINTELLIGENT CONCRETEConcrete not behaving the way it should?Intelligent Concrete combines lab-level testing with real-world field experience to identify the true root cause of concrete performance issues—not just treat the symptoms.Reach out for help: https://www.concretelogicpodcast.com/intelligent-concrete CONCRETE LOGIC ACADEMYEarn PDHs in the same straight-talk format as the podcast:Join now: https://www.concretelogicpodcast.com/academySUPPORT THE PODCASTDid you get value out of the show? Give some value back:https://www.concretelogicpo