Cement Cores (IMAGE) Drexel University Caption In the lab of Drexel University assistant professor Yaghoob Farnam, researchers are using recycled materials, like slag, silica fume and fly ash to make concrete that can withstand the chemical deterioration caused by concrete's reaction with road salt. Credit Drexel 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.