Shear strength test (IMAGE) RMIT University Caption Researchers used special machinery to assess how the recycled material performed under frictional force, replicating the pressures of being driven over by countless vehicles. Credit RMIT University Usage Restrictions Credit RMIT University 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.