Not All Concrete Is the Same: Low Embodied Carbon Dry-Cast Concrete Masonry

Concrete masonry units (CMUs) are made from dry-cast concrete, which uses less cement and sequesters carbon at a faster and greater rate than wet-cast concrete. This course begins with an overview of concrete products and the differences between dry- and wet-cast concrete, then explores the relationship between concrete and the carbon cycle, recent research into CMU sequestration rates, and the results of mini life-cycle assessments comparing different wall systems. Finally, some practical strategies for further reducing embodied carbon are reviewed.

Upon completion of this course, the Learner should be able to:

• Recall the differences between dry-cast (CMU) and wet-cast (ready-mix) concrete and how these differences contribute to CMU assemblies having lower embodied carbon and higher carbon sequestration rates.
• Explain why concrete sequesters carbon dioxide by first looking at the larger geologic carbon cycle and then the cement production carbon cycle.
• Observe the embodied carbon differences for several types of wall assemblies and for CMU assemblies, incorporating recent industry carbon sequestration test results.
• Recall several different strategies to lower the embodied carbon of dry-cast (CMU) structures at the design phase, cradle-to-gate stage, use stage, and end of life.

Approximately 1 hour, 15 minutes. Delivered online, at your own pace.

Presented by Nicholas Lang on behalf of Concrete Masonry & Hardscapes Association (CMHA). View the Privacy Policy .