Cement mixing (IMAGE) Massachusetts Institute of Technology Caption The high temporal and spatial resolution Raman imaging technique opens opportunities to answer millennia-old questions regarding cement chemistry. This high-resolution Raman image shows the hydration of alite (white) forming C-S-H (blue) and portlandite (red). Other components are belite (green) and calcite (yellow). Credit Image courtesy of Franz-Josef Ulm, Admir Masic, Hyun-Chae Chad Loh, et al Usage Restrictions Images are made available to non-commercial entities, press and the general public under a Creative Commons Attribution Non-Commercial No Derivatives license. You may not alter the images provided, other than to crop them to size. A credit line must be used when reproducing images License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.