World of Concrete postpones 2021 Las Vegas show Jonathan Ng, Las Vegas Review-Journal · September 30, 2020 at 1:46 am The largest construction convention, World of Concrete, will be pushed back to June, the trade show announced Tuesday. The trade show, with its annual bricklaying competition, attracts tens of thousands of contractors, sales representatives and industry experts from all over the world. World of Concrete said it will now host its 2021 annual convention June 8-10 at the Las Vegas Convention Center. Previously, the trade show was scheduled for January. “We have a commitment to our exhibitors and attendees to provide a valuable and productive face-to-face experience at WOC each year,” World of Concrete’s Jackie James said in a statement.