ASH 2 (IMAGE) Rice University Caption A scanning electron microscope image shows spherical particles in type C fly ash used by Rice University engineers to make cementless binder for concrete. Credit Multiscale Materials Laboratory/Rice University Usage Restrictions None 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.