New design toughens cement-based material (IMAGE) Princeton University, Engineering School Caption Researchers Reza Moini, left, and Shashank Gupta create stronger and more durable building materials. Credit Sameer A. Khan/Fotobuddy Usage Restrictions non-commercial use License Original 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.