CAOXY Deteriorating Concrete (IMAGE) Drexel University Caption A compound, called CAOXY, that forms when road salt interacts with concrete is behind the deterioration of road surfaces and the formation of potholes. Drexel University researchers are trying to thwart CAOXY formation using a special kind of bacteria. 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.