In this episode of the Concrete Logic Podcast, Dr. Jon Belkowitz and host Seth Tandett discuss the excessive costs and challenges associated with low carbon concrete, particularly Type 1L cement. They delve into the implications for the cement industry, the struggles faced by Departments of Transportation (DOTs) with new cement standards, and misconceptions surrounding blended cements. The conversation covers the shift towards performance-based design, the implications of ACI 323 on concrete practices, and the role of concrete pumping in quality assurance. They also highlight the importance of long-term testing for new materials and the need for research and development in ready-mix concrete to address industry challenges.
Takeaways
• Low carbon concrete has significant cost implications for the industry.
• Misconceptions about blended cements are prevalent in the industry.
• The shift to low carbon cements has led to premature cracking issues.
• Concrete performance is not solely determined by its strength.
• Performance-based design has shifted the responsibility from prescriptive to outcome-based.
• Long-term testing is crucial for new concrete materials to ensure reliability.
• Research and development in ready-mix concrete is often neglected in contracts. Chapters
00:00 Introduction to Low Carbon Concrete
04:31 The Cost Implications of Low Carbon Concrete
08:06 Challenges Faced by DOTs with New Cements
12:42 Understanding the Shift in Cement Standards
16:45 The Impact of New Cements on Concrete Durability
20:32 Misconceptions About Blended Cements
24:15 Abrasion Resistance and Concrete Performance
27:14 The Concrete Industry's Strength Assumptions
29:39 Performance-Based Concrete Design
31:24 Impact of ACI 323 on Concrete Practices
32:53 The Role of Concrete Pumping in Quality Assurance
34:51 Historical Challenges in the Concrete Industry
37:59 Research and Development in Ready-Mix Concrete
40:43 The Importance of Long-Term Testing
46:34 The Future of Type 1L Cements
49:43 Balancing Perspectives in Concrete Discussions
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Episode References
Guest: Dr. Jon Belkowitz | Intelligent Concrete
Guest Website: https://www.intelligent-concrete.com/
Producers: Jodi Tandett
Donate & Become a Producer: https://www.concretelogicpodcast.com/support/
Music: Mike Dunton | https://www.mikeduntonmusic.com | mikeduntonmusic@gmail.com | Instagram @Mike_Dunton
Host: Seth Tandett, seth@concretelogicpodcast.com
Host LinkedIn: https://www.linkedin.com/in/seth-tandett/
Website: https://www.concretelogicpodcast.com/
LinkedIn: https://www.linkedin.com/company/concrete-logic-podcast
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