Title:
Raman Spectroscopy & Imaging: What, How, and Why?
Author(s):
Garg
Publication:
Web Session
Volume:
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
10/23/2022
Abstract:
Raman spectroscopy has been used in the characterization of cementitious materials for nearly 50 years. However, hyperspectral mapping or Raman imaging is a relatively new technique that produces phase maps or spectral images of sample surfaces by collecting a Raman spectrum on every pixel. Over the last 10 years, the capabilities of Raman imaging have significantly improved, primarily due to hardware and software advancements in the Raman confocal microscopes and spectrometers. In this talk, the audience will learn what is Raman spectroscopy and imaging and how this technique works on various concrete ingredients. Specifically, applications on heterogeneous ingredients of concrete (ranging from aggregate to cement clinkers) will be shared, where this technique enables accurate and precise phase quantification via a mapping approach at a high spatial, sub-micron resolution. Finally, with an outline of recent advancements and challenges, the audience will learn the potential future role of this tool in the domain of concrete characterization.