Title: Arctic Ice Management
Summary: Climate change is causing Arctic sea ice to melt faster during the summer months than it can be replenished during the winter, leading to a deficit of sea ice in the Arctic. Arctic Ice Management (2017) proposed a plan to promote the growth of Arctic ice during the winter months by pumping seawater to the surface of the ice. This study tests this hypothesis by setting up an experiment in a large walk-in refrigerator and freezer to simulate Arctic temperatures.
Contributors: Johnathan Gamaunt, Dr. Steven Desch, Dr. Hilairy Hartnett, Dr. Christopher Groppi, Antonio Acuna
Title: Relating nano-mechanical response to qualitative chemical maps of ultra-high performance cementitious binders
Summary: The objective of this research was to characterize the microstructural properties of ultra-high-performance (UHP) cement pastes commonly used to repair bridges. Following micromechanical testing via nanoindentation and elemental mapping via energy dispersive X-ray, statistical clustering was performed to group the micromechanical and chemical responses, identify major reaction products, and reveal the large disparity in their mechanical properties. The study found that incorporation of aluminum into hydration products, a cause of chemical attack and cement deterioration, depended more on the Ca/Si ratio in the cement rather than the amount of Al in the starting materials.
Research Advisor: Dr. Narayanan Neithalath
Other Contributing Researchers: Dr. Christian G. Hoover and Dr. Barzin Mobasher