Videos, Webinars & More

Larry Rowland at Heidelberg Materials discusses Heidelberg's steps to reduce carbon emissions in the built environment. Circular economy and carbon capture and storage are discussed, as well as Heidelberg's Ecocem products.

Concrete materials and mixture proportions are changing to reduce the global warming potential (GWP) associated with concrete production. To reduce the GWP of concrete the industry is moving to replace cement clinker with supplementary cementitious materials (SCM, e.g., natural pozzolans, recycled glass, industrial by-products, or carbonated cement fines) that are emerging to reduce the GWP of concrete mixtures. This presentation will discuss the need for accurate quantification of the reactivity of these materials. Calculation of the environmental product declaration (EPD) of concrete will be discussed along with the shortcomings of using this approach.

Green concrete, carbon-neutral concrete, sustainable design… so many terms and so much to learn about how to make it happen. Andrea Schokker, NEU technical consultant and board advisor, provides an overview of sustainable concrete basics from material choice to design, plus discusses what to do now and what we can expect for the future.

The results of a low-carbon concrete tilt-up wall panel demonstration project will be presented that evaluated three concrete mixtures: a base level Type IL (Mix#1), the Type IL with 25% replacement with slag cement (Mix #2), and an ASTM C1157 cement with less than 5% portland cement (Mix#3). Extensive laboratory testing determined the bleed rate, initial and final set, compressive strength, splitting tensile strength, modulus of elasticity, and drying shrinkage of the three mixtures as well as establishing maturity relationships. Considerable information was obtained through testing and in situ monitoring providing lessons on how to use concrete with significantly lower carbon even under difficult temperature conditions.

Karen Scrivener, FREng, EPFL Switzerland, discusses changing the pattern of cement use and the most promising approach to reducing the clinker factor. She explains calcined clays and why they are the only realistic option for extending the use of SCMs.

Gaurav Sant, Ph.D., professor and Pritzker chair in Sustainability, and Institute Director at the University of California - Los Angeles, discusses what CCUS (Carbon Capture, Utilization and Storage) could mean for the sector.