The American Concrete Institute (ACI) today announced registration is open for the Spring 2026 ACI Concrete Convention, March 29 – April 1, 2026, in greater Chicago, Ill., USA. Discounted rates available until March 27, 2026. The official hotel for the ACI Concrete Convention is the Hyatt Regency O'Hare Chicago, and all Convention events will take place at this hotel. Known as the world’s gathering place for advancing concrete, the event will bring together engineers, contrac