EP #111: How Do Standards and SCMs Shape Concrete Durability?

In this episode of the Concrete Logic podcast, host Seth Tandett speaks with Larry Sutter, principal engineer at Sutter Engineering, about the development of standards and specifications for supplementary cementitious materials (SCMs) like fly ash and slag. They discuss the differences between standards and specifications, the role of fly ash in improving concrete durability, and the challenges of variability in materials. Larry also highlights emerging test methods for evaluating SCMs and the importance of performance-based specifications in the industry. 

Takeaways 

• Standards are documents developed through a consensus process. 
• Specifications serve as contracts between buyers and sellers. 
• Fly ash is the most used SCM in concrete. 
• SCMs improve concrete durability by reducing permeability. 
• Variability in materials is a constant challenge in concrete engineering. 
• Performance-based specifications are preferred over prescriptive ones. 
• Emerging materials require new performance-based specifications. 
• Understanding the reactivity of SCMs is crucial for concrete performance. 
• The industry must adapt to evolving standards and specifications. 
• Future specifications aim to encompass a wider range of SCMs. 

Chapters 
00:00 Introduction to Standards and Specifications 
03:09 Understanding Standards vs Specifications 
10:17 The Role of Fly Ash in Concrete 
18:03 Mechanisms of Durability Improvement 
22:52 Emerging Test Methods for SCMs 
30:21 Challenges in SEM Usage and Specifications 
35:37 Performance-Based Specifications for SCMs 
39:43 Future Directions in SCM Standards 

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Episode References 
Guest: Larry Sutter | Sutter Engineering | [email protected]
Guest Website:⁠ https://www.linkedin.com/in/larry-sutter-217b358/

Producers: Jodi Tandett 
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Music: Mike Dunton | ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠https://www.mikeduntonmusic.com⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ | ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠[email protected]⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ | Instagram ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠@Mike_Dunton⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ 
Host: Seth Tandett, ⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠[email protected]⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠⁠ 
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