This Symposium Publication contains the proceedings from the Tenth CANMET/ACI International Conference on Recent Advances in Concrete Technology, held in Seville, Spain, in October 2009. The 21 papers include Durability of Ultra-High-Performance Concrete, Shrinkage Reducing Effect of a Combination of Internal Curing and Shrinkage Compensating Agents on High-Performance Concrete, and Geopolymer Concrete--Sustainable Cementless Concrete.