EP #152: Concrete Mix Design Isn’t Complicated… Here’s the Proof

PRESENTED BY: GPRS Construction professionals know that utilities and concrete reinforcements can cause big problems when you’re on the job. GPRS helps you avoid them. We use ground penetrating radar to detect rebar, conduit, and post tension cables before you cut, core, or drill. And our concrete scans are 99.8% accurate… we guarantee it—helping you reduce hits, downtime, expenses, and keep your people safe. To keep your jobsite safer, visit https://www.concretelogicpodcast.com/GPRS SUMMARYIf you’ve never built your own concrete mix design… this episode fixes that.Dr. Jon Belkowitz walks through the ACI 211 method step-by-step, showing exactly how a mix is built from scratch.By the end, you’ll see that mix design isn’t magic.It’s just decisions… and a little math.WHAT YOU’LL LEARNWhat actually goes into a cubic yard of concrete — and why it mattersWhy mix design is basically a “choose your own adventure”How slump, aggregate size, and air content drive your entire mixThe simple math behind water-cement ratio (and why it controls everything)How to calculate cement, water, rock, and sand — step by stepWhy yield matters (and how getting it wrong costs real money)The difference between a design mix vs batch mixWhat changes when moisture shows up in your aggregates (this comes up near the end) CHAPTERS00:00 – Intro and how to support the show 02:20 – Shoutout to this episode’s Producer 03:00 – Why PDHs should actually be useful 05:20 – What is a cubic yard of concrete? 06:30 – Absolute volume method explained 09:50 – ACI 211 and “choose your own adventure” 13:30 – Selecting slump, water, and air content 17:00 – Adjusting water for admixtures 19:00 – Water-cement ratio and strength 21:00 – Aggregate proportions and why they matter 25:30 – Start of the actual math 31:30 – Calculating coarse aggregate 34:00 – Converting weights to volumes 36:30 – Solving for sand (the missing piece) 39:30 – Final mix design breakdown 40:10 – Design mix vs batch mix (what’s next) GUEST INFODr. Jon Belkowitz Intelligent Concrete Website: https://www.concretelogicpodcast.com/intelligent-concreteCONCRETE LOGIC ACADEMYGot a concrete problem no one can explain?Bring it to the Concrete Logic Academy.Ask questions. Share what you’re seeing. Get real answers you can use on the next pour.Simple as that. Free trial for pros here: https://www.concretelogicpodcast.com/pro SUPPORT THE PODCASTIf this episode helped you…If you learned something…If it made you think differently…Support the show here: https://www.concretelogicpodcast.comThis podcast runs on Value for Value.Give whatever you think the episode was worth. PARTNERSKUIU (performance gear Seth actually uses): https://www.concretelogicpodcast.com/kuiuInterested in advertising or working with us? Email: [email protected] CREDITSProducers: Joseph Swann, Jodi Tandett & Concrete Logic MediaMusic by Mike Dunton: https://www.mdunton.com/WHERE TO FIND CONCRETE LOGICWebsite: https://www.concretelogicpodcast.com YouTube: https://www.youtube.com/@concretelogicpodcast LinkedIn: https://www.linkedin.com/in/sethtandett/Instagram: https://www.instagram.com/concretelogicpodcast/