8/30/2021 6:00 AM
Staff members examine pieces of concrete removed from the debris pile at the site of the Champlain Towers South building collapse. Photo courtesy of NIST.
8/27/2021 6:00 AM
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8/25/2021 6:00 AM
8/24/2021 6:00 AM
University of Delaware microbiologist Julie Maresca holds one of the concrete cylinders she and her students have used to study bacterial communities that live in concrete. Photo courtesy of University of Delaware.
8/23/2021 6:00 AM
8/20/2021 6:00 AM
Photo courtesy of ICR Integrity.
8/19/2021 6:00 AM
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Image courtesy of Fraunhofer IMWS/Sven Doering.