Sustainable concrete (IMAGE) Flinders University Caption Flinders University sustainable construction materials lead researcher Dr Aliakbar Gholampour, right, and PhD civil engineering candidate Zakir Ikhasi who use natural fibres, lead slag (black sand) and waste glass sand materials in new-age concrete mixes. Credit Flinders University Usage Restrictions Courtesy Flinders University 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.