Bridge Management, Inspection and Sustainability

Full Session with Abstracts

341437-1 - Achieving Sustainability through Use of Supplementary Cementitious Materials in Concrete

Friday, April 20
9:30 AM - 10:30 AM
Location: 203A

Concrete, made from the ordinary Portland cement (OPC), is the single most widely used man made material in the world. It is the second-most-used commodity in the world behind only water. High volumes of cement are produced every year because of the ubiquitous use of concrete for infrastructure development. However, use of each ton of OPC is associated with nearly 0.8 tons of carbon di-oxide (CO2) gas emission into atmosphere. Replacing OPC partially with supplementary cementitious materials (SCMs) that are derived from industrial by-products, such as fly ash and slag can significantly reduce carbon footprint. Every year in the United States, coal plants produce 60-70 million tons of fly ash. Among these, a few million tons (<38%) are used by the construction industry; the remainder is landfilled. Therefore, consumption of fly ash in concrete is beneficial as it reduces the need for landfilling. However, if we continue to use SCMs at the current replacement level, by 2020, the prediction is that the volume of OPC used will be 3 times the volume used in 1990. Therefore, it is critical to explore and implement methodologies that can increase the replacement level of SCMs in concrete. This presentation will review the currently available methodologies for use of SCMs in concrete, their pros and cons. The presentation will also discuss future possibilities on how to increase the replacement level of SCMs in concrete and use of other less utilized SCMs such as limestone fillers and natural pozzolans.

Paramita Mondal

Associate Professor
University of Delaware

Associate Professor Paramita Mondal earned her bachelor of science degree in civil engineering at Jadavpur University in India (2001); her master of science degree in civil engineering from the University of Connecticut (2004); and her Ph.D. in civil engineering from Northwestern University (2008). Before joining the University of Delaware in 2017, she was an Assistant Professor and Associate professor at the University of Illinois at Urbana Champaign since 2009 and 2016 respectively.
Her research focuses on the development of the processing-property-performance relation of cement-based construction materials, and the design of new materials through the application of multi-scale characterization, nanotechnology and biomimicry. She combines experimental studies with computation to provide innovative material solutions that allow reduction in cement use in concrete, development of concrete using alternative "green" cement, and, most importantly, assurance of longer life of concrete structures reducing the need for frequent repair and rebuilding.
She belongs to the American Concrete Institute, the American Ceramic Society. She is an active member of the ACI 236, Materials Science committee and was the former chair of the and American Ceramic Society Cements Division.

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